1987 IROC-Z convertible. Are 4 IROCs too many? - Page 5 - Third Generation F-Body Message Boards

Go Back  Third Generation F-Body Message Boards > Tech Boards > History / Originality
Reload this Page >

1987 IROC-Z convertible. Are 4 IROCs too many?

History / Originality Got a question about 1982-1992 Camaro or Firebird history? Have a question about original parts, options, RPO codes, when something was available, or how to document your car? Those questions, answers, and much more!

1987 IROC-Z convertible. Are 4 IROCs too many?

Old 01-21-2018, 08:27 AM
  #201  
Supreme Member
iTrader: (3)
 
PurelyPMD's Avatar
 
Join Date: Jan 2013
Location: Newtown, CT
Posts: 3,017
Car: 1987 IROC Original Owner
Engine: LB9
Transmission: M39 MM5
Axle/Gears: G80 G92 J65
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

More is not always better!
PurelyPMD is offline  
Old 01-21-2018, 08:51 AM
  #202  
Moderator
 
scottmoyer's Avatar
 
Join Date: Jun 2000
Location: Florida
Posts: 7,808
Car: 87 IROC-Z, 82 Pace Car
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

It seems that the car on top of my lift gets used about as much as the one on the bottom. Granted, neither one gets enough time, but I've been trying to keep them both in service. Both cars need tires badly, so driving them is on hold until finances get me the tires and repairs they need.
scottmoyer is offline  
Old 01-23-2018, 12:28 AM
  #203  
Supreme Member
Thread Starter
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,537
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by scottmoyer View Post
It seems that the car on top of my lift gets used about as much as the one on the bottom. Granted, neither one gets enough time, but I've been trying to keep them both in service. Both cars need tires badly, so driving them is on hold until finances get me the tires and repairs they need.
Have you been happy with the lift, Scott? I'm pretty sure i'm going to get the same one in the Spring.

Last edited by chazman; 01-23-2018 at 02:34 AM.
chazman is offline  
Old 01-23-2018, 06:17 AM
  #204  
Moderator
 
scottmoyer's Avatar
 
Join Date: Jun 2000
Location: Florida
Posts: 7,808
Car: 87 IROC-Z, 82 Pace Car
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Very happy with it. One thing I found useful that I didn't get, but need to, is an additional rolling jacking tray. It comes with one that supports 4500#, and can have a scissor lift installed for around $700 that will lift the front or rear of the car off the runways for service work. For me, I want a second rolling jack tray so I can get all 4 wheels off the runways at the same time. Instead of the $700 hydraulic scissor jack, I'll just use bottle jacks and jack stands. So, consider getting two jacking trays when you order because they aren't light and shipping will be excessive for it.

Rolling Jack tray:


Jack tray with scissor lift installed:


The way I plan to use it:
scottmoyer is offline  
Old 01-23-2018, 09:06 AM
  #205  
Senior Member
 
Big&BadGTA's Avatar
 
Join Date: Jul 2013
Location: *member since 1999, I think - just can't remember my old name, and the big site crash...*
Posts: 735
Car: 89 GTA ASC Conv., Prev: 89 GTA 6.3L
Engine: 5.7L L98 TPI
Transmission: 700r4 Automatic
Axle/Gears: 3.27:1 w/ JG1 Options:B2L, N10, U1A
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

A suggestion for those considering 4 post lifts. Ditch the metal Ramps
and get Race Ramps for the lifts. Fred at Reverse Logic, a distributor of RR's, gave me a sweet deal on a pair. They weigh next to nothing, and being 4 ft long, provide a better (lesser) angle on approach.
I hope this helps.




.

Last edited by Big&BadGTA; 01-23-2018 at 09:34 AM.
Big&BadGTA is offline  
Old 01-23-2018, 10:58 AM
  #206  
Moderator
 
scottmoyer's Avatar
 
Join Date: Jun 2000
Location: Florida
Posts: 7,808
Car: 87 IROC-Z, 82 Pace Car
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

The Advantage Lift comes standard with 36" aluminum ramps. They aren't very heavy at all, but obviously more than race ramps. Many other lift companies have steel ramps that are heavy.
scottmoyer is offline  
Old 02-19-2018, 12:58 PM
  #207  
Supreme Member
Thread Starter
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,537
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?




Stopped by my parent's last night. I figured while I was there, I'd start the old girl up. She's been sleeping since October. Hooked up the battery and fired right up.

After about 10 minutes or so, I detected little wisps of steam coming up from the distributor area. It burned off after a minute or so, but then I got a slight whiff of anti-freeze smell. At the end of 30 minutes of running there was a small puddle of anti-freeze on the garage floor, under the passenger side, firewall area. I didn't see any interior leak on the passenger floor and it was really too dark and cramped in there for me to get a good look.

Heater core? Intake manifold leak? If I'm really lucky a loose heater hose clamp? I really need to get it back to my house for a full inspection.

Any ideas from you guys?
chazman is offline  
Old 02-19-2018, 03:25 PM
  #208  
Supreme Member
iTrader: (28)
 
Drew's Avatar
 
Join Date: Jul 1999
Location: Salina, KS
Posts: 17,307
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Cracked block.

Drew is offline  
Old 02-19-2018, 03:27 PM
  #209  
Supreme Member
Thread Starter
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,537
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by Drew View Post
Cracked block.


Noooo!

I suppose anything is possible, but tough to do on a block designed to take 3X the power it actually produces.
chazman is offline  
Old 02-19-2018, 05:31 PM
  #210  
Supreme Member
iTrader: (28)
 
Drew's Avatar
 
Join Date: Jul 1999
Location: Salina, KS
Posts: 17,307
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Never had a hose pin-hole just sitting in storage. Aren't all the hose clamps the constant torque spring clamps? I could see a frost plug rusting out. Or a heater core developing a leak, but I'd expect it'd drain in the vents. Could be the heater pipe hardline on the frame rail leaking, but I haven't seen that happen in a thirdgen yet.

572. It's the only way to be sure.
Drew is offline  
Old 02-19-2018, 09:58 PM
  #211  
Supreme Member
Thread Starter
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,537
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by Drew View Post
Never had a hose pin-hole just sitting in storage. Aren't all the hose clamps the constant torque spring clamps? I could see a frost plug rusting out. Or a heater core developing a leak, but I'd expect it'd drain in the vents. Could be the heater pipe hardline on the frame rail leaking, but I haven't seen that happen in a thirdgen yet.

572. It's the only way to be sure.

I think the heater hoses going to the heater core have worm gear clamps, but I'm not sure. I don't know if a leaky heater core would leak on the back of the engine, though. Ah, who knows.

A 572 would be nice, but if I were actually going to do something I'd put 2.25" exhaust manifolds, N10 exhaust and 3.42 gears in it - but I won't, since it's too mint to mess with.
chazman is offline  
Old 02-19-2018, 10:06 PM
  #212  
Supreme Member
iTrader: (28)
 
Drew's Avatar
 
Join Date: Jul 1999
Location: Salina, KS
Posts: 17,307
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

But! If it were mint, with a 572 BIG BLOCK it'd be so much more.
Drew is offline  
Old 02-19-2018, 10:51 PM
  #213  
Senior Member
 
Join Date: May 2000
Location: Long Island, NY, USA
Posts: 564
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by chazman View Post



Stopped by my parent's last night. I figured while I was there, I'd start the old girl up. She's been sleeping since October. Hooked up the battery and fired right up.

After about 10 minutes or so, I detected little wisps of steam coming up from the distributor area. It burned off after a minute or so, but then I got a slight whiff of anti-freeze smell. At the end of 30 minutes of running there was a small puddle of anti-freeze on the garage floor, under the passenger side, firewall area. I didn't see any interior leak on the passenger floor and it was really too dark and cramped in there for me to get a good look.

Heater core? Intake manifold leak? If I'm really lucky a loose heater hose clamp? I really need to get it back to my house for a full inspection.

Any ideas from you guys?
Freeze out plug?
Stuart S is offline  
Old 02-20-2018, 06:13 AM
  #214  
Senior Member
 
F-body-fan's Avatar
 
Join Date: Apr 2007
Location: Green Bay, WI
Posts: 700
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

to get steam you would think something would have had to drip on the exhaust? especially just running for 10 minutes in the garage. This will be bugging you in the middle of the night...

At first I was going to say intake manifold, but that should have followed the block & just dripped on the floor, Almost had to come from a hose & dripped on the the exhaust system.
OR at least that would make sense given your description?
F-body-fan is offline  
Old 02-20-2018, 09:46 AM
  #215  
Supreme Member
Thread Starter
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,537
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by F-body-fan View Post
This will be bugging you in the middle of the night...
Yes!
chazman is offline  
Old 02-20-2018, 10:02 PM
  #216  
Supreme Member
iTrader: (9)
 
1MeanZ's Avatar
 
Join Date: Sep 2001
Location: North Central Indiana
Posts: 2,849
Car: 2xIROC, GTA
Engine: 383, 305, 383
Transmission: TKO 600 / T5 / T56
Axle/Gears: 3.54, 3.08, 3.27
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

My vote is freeze plug or intake manifold gasket.
1MeanZ is offline  
Old 02-20-2018, 10:36 PM
  #217  
Supreme Member
Thread Starter
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,537
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by 1MeanZ View Post
My vote is freeze plug or intake manifold gasket.
Failed freeze plug seems so crazy and random to me.
chazman is offline  
Old 02-20-2018, 11:59 PM
  #218  
Supreme Member
iTrader: (28)
 
Drew's Avatar
 
Join Date: Jul 1999
Location: Salina, KS
Posts: 17,307
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

They rust.
Drew is offline  
Old 02-21-2018, 08:29 AM
  #219  
Supreme Member
iTrader: (9)
 
1MeanZ's Avatar
 
Join Date: Sep 2001
Location: North Central Indiana
Posts: 2,849
Car: 2xIROC, GTA
Engine: 383, 305, 383
Transmission: TKO 600 / T5 / T56
Axle/Gears: 3.54, 3.08, 3.27
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by chazman View Post
Failed freeze plug seems so crazy and random to me.
I know it does Charlie but I've had it happen to me. My '86 popped a freeze plug in the middle of summer. This was roughly 1998, car had 35k miles on it at the time. I worked weekends as a mechanic in High School. I went to the shop after school one day and one of the mechanics said steam was pouring out from my car in the parking lot. There was a pin hole in the freeze plug above the starter. It happens, and on a car that sits a lot and probably hasn't had the coolant changed frequently enough, it is actually fairly likely.
1MeanZ is offline  
Old 02-21-2018, 08:47 PM
  #220  
Senior Member
 
Join Date: May 2000
Location: Long Island, NY, USA
Posts: 564
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Dupe post, sorry

Last edited by Stuart S; 02-21-2018 at 10:05 PM.
Stuart S is offline  
Old 02-21-2018, 08:49 PM
  #221  
Senior Member
 
Join Date: May 2000
Location: Long Island, NY, USA
Posts: 564
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by Stuart S View Post
Freeze out plug?

Originally Posted by 1MeanZ View Post
My vote is freeze plug or intake manifold gasket.

Originally Posted by chazman View Post
Failed freeze plug seems so crazy and random to me.
Originally Posted by 1MeanZ View Post
I know it does Charlie but I've had it happen to me. My '86 popped a freeze plug in the middle of summer. This was roughly 1998, car had 35k miles on it at the time. I worked weekends as a mechanic in High School. I went to the shop after school one day and one of the mechanics said steam was pouring out from my car in the parking lot. There was a pin hole in the freeze plug above the starter. It happens, and on a car that sits a lot and probably hasn't had the coolant changed frequently enough, it is actually fairly likely.
I maintain my thoughts, lol
Stuart S is offline  
Old 02-21-2018, 09:39 PM
  #222  
Supreme Member
Thread Starter
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,537
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

We'll know in a month or two when I bring it home.
chazman is offline  
Old 02-21-2018, 10:00 PM
  #223  
Supreme Member
iTrader: (28)
 
Drew's Avatar
 
Join Date: Jul 1999
Location: Salina, KS
Posts: 17,307
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Hey! Why didn't I warrant a quote Stu? I mentioned the frost plug possibility all the way back in #210.

Originally Posted by Drew View Post
I could see a frost plug rusting out.
Drew is offline  
Old 02-21-2018, 10:07 PM
  #224  
Senior Member
 
Join Date: May 2000
Location: Long Island, NY, USA
Posts: 564
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by Drew View Post
Hey! Why didn't I warrant a quote Stu? I mentioned the frost plug possibility all the way back in #210.



Because I’ve never heard of it referred to as a frost plug; sounds like Kansas speak
Stuart S is offline  
Old 02-22-2018, 07:42 AM
  #225  
Supreme Member
iTrader: (3)
 
PurelyPMD's Avatar
 
Join Date: Jan 2013
Location: Newtown, CT
Posts: 3,017
Car: 1987 IROC Original Owner
Engine: LB9
Transmission: M39 MM5
Axle/Gears: G80 G92 J65
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

This is how it starts Charlie, next thing you know you'll be selling them all!
PurelyPMD is offline  
Old 02-22-2018, 09:10 AM
  #226  
Supreme Member
iTrader: (9)
 
1MeanZ's Avatar
 
Join Date: Sep 2001
Location: North Central Indiana
Posts: 2,849
Car: 2xIROC, GTA
Engine: 383, 305, 383
Transmission: TKO 600 / T5 / T56
Axle/Gears: 3.54, 3.08, 3.27
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

If he sells them all I call dibs on the '87 vert. the LG4 and 700R4 can go to Omnisource and be replaced with a real small block and a T56, then the car will be perfect!
1MeanZ is offline  
Old 02-22-2018, 09:30 AM
  #227  
Supreme Member
Thread Starter
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,537
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by PurelyPMD View Post
This is how it starts Charlie, next thing you know you'll be selling them all!

Oh, Chris, Chris, Chris.......


If I had a warehouse, I think I'd never sell anything. I'd be like Jay Leno.

The problem is, other cars are always catching my eye....and I have to make space. I think I'll have to get a lift this Spring and see what happens.

Last edited by chazman; 02-22-2018 at 10:11 AM.
chazman is offline  
Old 02-22-2018, 09:31 AM
  #228  
Supreme Member
Thread Starter
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,537
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by 1MeanZ View Post
If he sells them all I call dibs on the '87 vert. the LG4 and 700R4 can go to Omnisource and be replaced with a real small block and a T56, then the car will be perfect!
It would make a nice bookend to your '86.
chazman is offline  
Old 02-22-2018, 11:33 AM
  #229  
Supreme Member
iTrader: (4)
 
82tarecaro's Avatar
 
Join Date: Aug 2003
Location: NYC
Posts: 2,636
Car: 1982 Recaro TA, 1989 TTA#948
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Just caught up on this thread. I had a similar issue with my 82 TA. It was a loose heater hose.
82tarecaro is offline  
Old 02-22-2018, 12:34 PM
  #230  
Supreme Member
Thread Starter
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,537
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by 82tarecaro View Post
Just caught up on this thread. I had a similar issue with my 82 TA. It was a loose heater hose.

From your keyboard to God's ear!
chazman is offline  
Old 02-22-2018, 12:39 PM
  #231  
Supreme Member
iTrader: (4)
 
82tarecaro's Avatar
 
Join Date: Aug 2003
Location: NYC
Posts: 2,636
Car: 1982 Recaro TA, 1989 TTA#948
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by chazman View Post
From your keyboard to God's ear!
I figured you would sleep better at night until it warms up enough to find the problem.
82tarecaro is offline  
Old 02-22-2018, 12:42 PM
  #232  
Supreme Member
Thread Starter
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,537
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by 82tarecaro View Post
I figured you would sleep better at night until it warms up enough to find the problem.
Thanks brother!
chazman is offline  
Old 02-22-2018, 10:16 PM
  #233  
Supreme Member
iTrader: (28)
 
Drew's Avatar
 
Join Date: Jul 1999
Location: Salina, KS
Posts: 17,307
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by Stuart S View Post
Because Iíve never heard of it referred to as a frost plug; sounds like Kansas speak
Nope. Google knows what's up. Seems it's just your strange East Coast dialect that's tripping you up.

Drew is offline  
Old 04-09-2018, 09:37 PM
  #234  
Member
iTrader: (3)
 
SirReveller's Avatar
 
Join Date: Aug 2017
Location: Toronto, ON
Posts: 349
Car: '89 'ROC
Engine: 5.7L
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

How did I miss this? Subscribed.
SirReveller is offline  
Old 04-10-2018, 01:17 PM
  #235  
Member
iTrader: (1)
 
flippermtc's Avatar
 
Join Date: Oct 2006
Location: King of Prussia Pa
Posts: 412
Car: 88 IROC T-Top
Engine: 5.7
Transmission: Automatic
Axle/Gears: 2.73
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Terrific color combo. Beautiful 87.
flippermtc is offline  
Old 04-16-2018, 01:37 PM
  #236  
Supreme Member
Thread Starter
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,537
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by flippermtc View Post
Terrific color combo. Beautiful 87.
Thanks.

Last edited by chazman; 05-06-2018 at 05:57 PM.
chazman is offline  
Old 05-06-2018, 06:14 PM
  #237  
Supreme Member
Thread Starter
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,537
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Took the yellow '85 and swapped it for this car today and brought it home. Perfect weather today to get to drive two IROCs. I got thumbs going with the yellow car and thumbs up coming with the met. red car.

That coolant leak from earlier didn't materialize today, not even any sign of it, even after driving 20 miles. Strange. I'd forgotten how nice this car drives. The HO air cleaner makes an intoxicating howl when you floor it. You may not be going very fast, but it sure sounds like you are!

Last edited by chazman; 05-06-2018 at 06:43 PM.
chazman is offline  
Old 05-06-2018, 07:37 PM
  #238  
Member
 
George Klass's Avatar
 
Join Date: Mar 2017
Location: Montreal
Posts: 176
Car: 1989 Trans Am
Engine: L03
Transmission: 700R4
Axle/Gears: 2.73
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Weird, hopefully it doesn't come back!
George Klass is offline  
Old 05-22-2018, 10:51 PM
  #239  
Supreme Member
Thread Starter
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,537
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

As many of you know, ThirdGen Expo got rained out. We're planning a new date shortly.

Anyway, I bring it up because I brought this car to Expo. As I was loading the trunk before going, and closed the deck lid, it wouldn't pull down. I messed with it for a few minutes, but had to go. The trunk lid was able to latch but wasn't all the way down. Got to Expo, weather was showing no more rain and then the sky exploded with rain. Several of us found refuge at my house. Thank God I already had the top up, because the tonneau won't unlatch unless the pulldown is all the way down on the rear deck. It would have been a disaster!

Anyway, 15 minutes later in my garage, and what do car guys to when it's raining? Try to fix cars, that's what!

Here is 1MeanZ's butt, as he's trying to diagnose my problem with Sean, (RealSlow RS?) giving technical support via cell phone.




Anyway, with that diagnostic info, I contacted Lon, (lonsal) at Top Down Solutions for advice. I suspected the the reverser switch as the culprit.

When I disassembled the pull down contraption it was obvious that the switch wasn't making contact with the motor. I attached it and everything works. I reassembled and reinstalled and nothing. The switched had pulled away again. I removed and disassembled again and noticed the plastic part that holds the switch was broken.

So I epoxied it together and waiting for it to cure and have my fingers crossed.







BTW, this is a replacement motor as described to me by lonsal.

Last edited by chazman; 05-22-2018 at 10:55 PM.
chazman is offline  
Old 05-22-2018, 11:37 PM
  #240  
Supreme Member
iTrader: (28)
 
Drew's Avatar
 
Join Date: Jul 1999
Location: Salina, KS
Posts: 17,307
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

So uhhhh.... You suffered a cracked motor housing. GM 20160581 Dorman 747-001 Cheap cheap CHEAP on Ebay (starting at $28 O.B.O. with free shipping). Very common failure.
Drew is offline  
Old 05-22-2018, 11:45 PM
  #241  
Supreme Member
Thread Starter
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,537
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by Drew View Post
So uhhhh.... You suffered a cracked motor housing. GM 20160581 Dorman 747-001 Cheap cheap CHEAP on Ebay (starting at $28 O.B.O. with free shipping). Very common failure.
Not the actual motor housing, although there is a crack in that. It's the other clear plastic bracket/housing/whatever that the reverser switch uses to to attach to it. Got a part number for that?

Last edited by chazman; 05-23-2018 at 12:03 AM.
chazman is offline  
Old 05-23-2018, 12:41 AM
  #242  
Supreme Member
iTrader: (28)
 
Drew's Avatar
 
Join Date: Jul 1999
Location: Salina, KS
Posts: 17,307
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Is the reversing switch not screwed to the clear plastic motor housing? Pretty sure there's only two clear plastic parts in the assembly, the housing and the nut. Been a year or two since I've had a pile of them torn apart, so maybe I'm confused.

Drew is offline  
Old 05-23-2018, 12:44 AM
  #243  
Supreme Member
Thread Starter
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,537
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by Drew View Post
Is the reversing switch not screwed to the clear plastic motor housing? Pretty sure there's only two clear plastic parts in the assembly, the housing and the nut. Been a year or two since I've had a pile of them torn apart, so maybe I'm confused.
One more, the one that attaches the reversing switch.
chazman is offline  
Old 05-23-2018, 12:46 AM
  #244  
Supreme Member
Thread Starter
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,537
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by Drew View Post
Is the reversing switch not screwed to the clear plastic motor housing? Pretty sure there's only two clear plastic parts in the assembly, the housing and the nut. Been a year or two since I've had a pile of them torn apart, so maybe I'm confused.


I don't see it in the diagram. I didn't see the part on Lon's site either. Well, that epoxy had better work.

Last edited by chazman; 05-23-2018 at 12:50 AM.
chazman is offline  
Old 05-23-2018, 01:43 AM
  #245  
Supreme Member
iTrader: (28)
 
Drew's Avatar
 
Join Date: Jul 1999
Location: Salina, KS
Posts: 17,307
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

If you're talking about the cracked piece in this pic -


That's the housing, #9 in the diagram and the part numbers I referenced earlier. I suppose it could look like 2 or more pieces after it cracks apart, but normally it's once piece that snakes it's way around everything in the bottom half of the assembly.

This photo is all the parts from the bottom end. Just for fun, everything in this pic aside from the steel pieces and the motor is destroyed in one way or another too.


Drew is offline  
Old 05-23-2018, 01:51 AM
  #246  
Supreme Member
Thread Starter
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,537
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by Drew View Post
If you're talking about the cracked piece in this pic -


That's the housing, #9 in the diagram and the part numbers I referenced earlier. I suppose it could look like 2 or more pieces after it cracks apart, but normally it's once piece that snakes it's way around everything in the bottom half of the assembly.

This photo is all the parts from the bottom end. Just for fun, everything in this pic aside from the steel pieces and the motor is destroyed in one way or another too.



Hmmmm.... I'll get a better look tomorrow.
chazman is offline  
Old 05-23-2018, 01:57 AM
  #247  
Supreme Member
iTrader: (28)
 
Drew's Avatar
 
Join Date: Jul 1999
Location: Salina, KS
Posts: 17,307
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

It's hard to illustrate because your image is upside down and most people photo the piece from other angles... But if you look at this Ebay pic (Credit: Mdmuscle) you can see the two holes on the top right which are the two holes where your crack is.



In the image of the busted parts I posted, you can see the two holes at the bottom left corner, just hard to make it out because it was cracked just like yours and the broken piece fell off when I disassembled it. LOL
Drew is offline  
Old 05-23-2018, 09:22 AM
  #248  
Supreme Member
Thread Starter
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,537
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Okay, gotcha!

According to Lon, if I have the aftermarket motor, (two flat sides), you can't use that housing, that's for the cylindrical GM motor only. You need to get this one with the motor already incorporated in the housing:

Last edited by chazman; 05-23-2018 at 05:02 PM.
chazman is offline  
Old 05-24-2018, 10:29 PM
  #249  
Supreme Member
iTrader: (8)
 
DynoDave43's Avatar
 
Join Date: Aug 2013
Location: MICHIGAN
Posts: 3,029
Car: 1988 Trans Am
Engine: L03
Transmission: 700R4
Axle/Gears: 10 Bolt 2.73 Open
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Sorry you ran into this problem chazman. But thanks for the photos. I'll being doing this on mine soon enough.
DynoDave43 is offline  
Old 05-24-2018, 10:56 PM
  #250  
Supreme Member
iTrader: (28)
 
Drew's Avatar
 
Join Date: Jul 1999
Location: Salina, KS
Posts: 17,307
Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by chazman View Post
Okay, gotcha!

According to Lon, if I have the aftermarket motor, (two flat sides), you can't use that housing, that's for the cylindrical GM motor only. You need to get this one with the motor already incorporated in the housing
Beats me. I've always been able to find the pieces I need from a donor car, so I've never had to mess with the aftermarket motors. But just from looking at how the replacement motors come with the housing, and the housing/motor isn't the same as the OE setup, yeah, they don't interchange. You would need to replace the motor and housing in that case. I've never seen the factory motor fail, just lots of broken housings, a couple stripped gear nuts, a broken switch.

Given the mileage on the car, I'd be really tempted to find a correct date coded motor and restore it to original, rather than using a substitute setup.

People need to stop slamming thirdgen trunks and hatches! Push it down slowly and carefully until it clicks, and the motor does the rest. It's awesome. Slamming is barbaric!
Drew is offline  

Thread Tools
Search this Thread
Advertising
Featured Sponsors
Vendor Directory

Contact Us Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: