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Oil coming out tail pipes?

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Old Mar 18, 2003 | 09:57 PM
  #1  
AlabamaThunder's Avatar
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From: Fyffe/Rainsville, Alabama
Car: 1986 IROC-Z, 1990 RS
Engine: 383 Stroker TPI, 350 About To Go In
Transmission: 700R4 W/ Shift Kit And Stall, 700R4 W/ Shift Kit
Oil coming out tail pipes?

What could be causing this?

This care has pretty much been setting for a few years, i have just bought it.

any ideas?

Thanks
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Old Mar 18, 2003 | 10:18 PM
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From: parishville NY upstate
Car: 86 IROC-Z
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.42s/posi/disc
umm

major blow by. does it smoke alot?
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Old Mar 18, 2003 | 10:22 PM
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Car: yy wife, crazy.
Engine: 350, Vortecs, 650DP
Transmission: TH-350
Axle/Gears: 8.5", 3.42
Welcome to TGO.

There are a multitude of things that can cause oil out the tailpipes.

First...... is it actual oil, or blue smoke?

If it's raw oil (never good) it's more than likely the intake manifold gasket(s).

If it's smoke, it could be the pistons rings (as mentioned), the valve seals, or even as simple as the PCV valve.

Let's just hope it's not a head gasket.

Try and be more descriptive about what's happening and I'm sure you'll get more help.

Last edited by AJ_92RS; Mar 18, 2003 at 10:26 PM.
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Old Mar 18, 2003 | 10:37 PM
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From: Fyffe/Rainsville, Alabama
Car: 1986 IROC-Z, 1990 RS
Engine: 383 Stroker TPI, 350 About To Go In
Transmission: 700R4 W/ Shift Kit And Stall, 700R4 W/ Shift Kit
Thanks, aight when its has been running oil runs into the pipes and if you stick your finger in there u get your fingers all in oil...i think it must be a gasket....the car only has 63k orig miles aint been drove much....how much will the gasket run you think for the TPI 305?
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Old Mar 18, 2003 | 10:50 PM
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ZZ28ZZ's Avatar
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From: Austin
Car: 82 Z-28
Engine: 383 TPI
Transmission: 700R4
Does the eng run good?
Is it possible someone fogged the eng with oil knowing it would be stored for a while?
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Old Mar 18, 2003 | 10:58 PM
  #6  
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From: Fyffe/Rainsville, Alabama
Car: 1986 IROC-Z, 1990 RS
Engine: 383 Stroker TPI, 350 About To Go In
Transmission: 700R4 W/ Shift Kit And Stall, 700R4 W/ Shift Kit
yeah its pos. also it runs very good......
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Old Mar 18, 2003 | 11:03 PM
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The intake gasket kit is about $30. Comes with all the gaskets you need for your plenum as well. Also a gasket you need for the distributor. It comes with all of the gaskets you will need to replace if you take your intake off. There's about 10 gaskets. Go ahead and replace the thermostat and it's gasket as well if you DO do the intake. But I'd say that if the car is running good, drive it for a while and see if it stops, or if it's losing oil. Call the original owner and ask him/her about it! Matt
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Old Mar 18, 2003 | 11:41 PM
  #8  
ZZ28ZZ's Avatar
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From: Austin
Car: 82 Z-28
Engine: 383 TPI
Transmission: 700R4
If you are burning oil bad enough to have oil in tail pipe, you'll be fouling plugs pretty soon.

Wouldn't hurt to pull the plugs and see what they look like.

Maybe even a quick compression check while the plugs are out.

The intake gaskets are cheap. Probably abt $20 or so.
You'll need to buy anti-freeze and probably a new thermostat if you replace the intake gaskets.

If it was me, and the eng was running normally, I'd warm-up the eng then shut it off. Let it sit for like 5 mins, then check the oil. Remember exactly where the oil is on the dipstick. Maybe even mark it by scratching a small line with a pocket knife. Drive car abt a 50 to 100 miles and re-check the oil level.

When the eng is shut-off, oil continues to drain into the pan for a few mins. If you check it the first time say,, 20 mins after shutdown, then only wait 2 or 3 mins the next time, it may look as if the eng was using oil when it wasn't.

Use the same amount of delay time after shut-down to get comparable results. 5 mins delay would be sufficient. Try and park on level surface when checking oil since that can effect the readings too.

Keep re-checking the oil level every 50-100 miles untill you have a few hundered miles or so.

If there's oil in the pipes, there's going to be smoke simply cause the pipes run hot, but maybe, just maybe (fingers crossed) the oil will burn out of the pipes and the eng will be OK.
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Old Mar 19, 2003 | 12:22 AM
  #9  
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From: Fyffe/Rainsville, Alabama
Car: 1986 IROC-Z, 1990 RS
Engine: 383 Stroker TPI, 350 About To Go In
Transmission: 700R4 W/ Shift Kit And Stall, 700R4 W/ Shift Kit
So what could i mess up driving it that far? is there anyway i could just plain old blow the motor up?
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Old Mar 19, 2003 | 12:41 AM
  #10  
ZZ28ZZ's Avatar
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From: Austin
Car: 82 Z-28
Engine: 383 TPI
Transmission: 700R4
is there anyway i could just plain old blow the motor up?
Yeah, running it out of oil. That's why I said to check it frequently.

I don't think you will make anything worse by driving it; other than maybe fouling a plug.

Catalytic converters don't like liquid oil being introduced into them, but the damage has probably already been done.
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Old Mar 19, 2003 | 12:46 AM
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From: Fyffe/Rainsville, Alabama
Car: 1986 IROC-Z, 1990 RS
Engine: 383 Stroker TPI, 350 About To Go In
Transmission: 700R4 W/ Shift Kit And Stall, 700R4 W/ Shift Kit
aight thanks...
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Old Mar 19, 2003 | 01:15 AM
  #12  
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A bad intake gasket will leak coolant, not oil. There is no oil running through the intake, but I suppose a bad gasket could cause an internal vacuum leak that would suck oil vapor from the lifter valley into the combustion chambers. I don't think that's too likely, though. You'd probably have running problems.

I think your problem is probably worn valve seals. If not driven, they will dry up and crack and leak oil. I think that's likely since your car is 17 years old and has less than 70k. This will deposit oil in your exhaust and sometimes on the back of your bumper. Don't go changing your intake gaskets yet. They're probably not the problem. Check for a puff of blue smoke on startup, or smoke from the tailpipes under load, or any time actually.
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Old Mar 19, 2003 | 01:40 AM
  #13  
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From: Fyffe/Rainsville, Alabama
Car: 1986 IROC-Z, 1990 RS
Engine: 383 Stroker TPI, 350 About To Go In
Transmission: 700R4 W/ Shift Kit And Stall, 700R4 W/ Shift Kit
yeah its smoking but what exaust wouldnt with oil in it while running?
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Old Mar 19, 2003 | 04:38 AM
  #14  
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From: Fyffe/Rainsville, Alabama
Car: 1986 IROC-Z, 1990 RS
Engine: 383 Stroker TPI, 350 About To Go In
Transmission: 700R4 W/ Shift Kit And Stall, 700R4 W/ Shift Kit
So what should i do guys?

Wait it out and chance blowing the motor?

OR go ahead and buy some new gaskets or whatever it needs?
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Old Mar 19, 2003 | 10:17 AM
  #15  
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From: Fyffe/Rainsville, Alabama
Car: 1986 IROC-Z, 1990 RS
Engine: 383 Stroker TPI, 350 About To Go In
Transmission: 700R4 W/ Shift Kit And Stall, 700R4 W/ Shift Kit
TTT anyone else?


Any more ideas?

This is freaking me out!

thanky
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Old Mar 19, 2003 | 10:34 AM
  #16  
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I'd wait it out and keep an eye on the oil level. If you're not losing oil, you're probably fine. If you ARE losing oil, I'd say it's the valve seals. That would be a goo place to start anyways. But from what you have described, I'd say that somebody jus put oil in there. It could take a while to get it out if you have a puddle of it sitting in your muffler or something. Drive it and keep an eye on the oil. If it's a lot coming out, you'll notice a difference in oil level quickly I'd think. Matt
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Old Mar 19, 2003 | 11:07 AM
  #17  
AlabamaThunder's Avatar
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From: Fyffe/Rainsville, Alabama
Car: 1986 IROC-Z, 1990 RS
Engine: 383 Stroker TPI, 350 About To Go In
Transmission: 700R4 W/ Shift Kit And Stall, 700R4 W/ Shift Kit
Aight thanks man
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Old Mar 19, 2003 | 01:09 PM
  #18  
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From: "When the going gets weird, the weird turn pro." -RIPHST
Car: 1991 RS
Engine: 383TBI Fastburns and 2"TB
Transmission: T56 held up by Spohnstuff
Is it possible that the rings have stuck in the piston land and are allowing blow by. I mention this since you said the car ghad been sitting.
At any rate- it will certainly take some engine tear down to fix.
Best-
S-D
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Old Mar 19, 2003 | 01:16 PM
  #19  
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From: Readsboro, VT
Car: 85 IROC-Z / 88 GTA
Engine: 403 LSx (Pending) / 355 Tuned Port
Transmission: T56 Magnum (Pending) / T5
Axle/Gears: 3.42 / ?
If this is really oil, I'm guessing that it smokes so bad that you can't see cars behind you when you drive. If not, I would question whether it's really oil. I responded to this somewhere else (cz28.com maybe?) but I will here too.

I suspect that what you're seeing is condensation mixing with the carbon in your exhaust. if you're running very rich, it's not uncommon for black goop to shoot out the tailpipes. When my IROC ran rich, I had so much black crap shooting out of the exhaust that it stained my garage floor.
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Old Mar 20, 2003 | 01:05 AM
  #20  
AlabamaThunder's Avatar
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From: Fyffe/Rainsville, Alabama
Car: 1986 IROC-Z, 1990 RS
Engine: 383 Stroker TPI, 350 About To Go In
Transmission: 700R4 W/ Shift Kit And Stall, 700R4 W/ Shift Kit
Fixed it!

Needed new gasket

put it in now its runnin right

thanky for the help guys.
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Old Mar 20, 2003 | 07:56 AM
  #21  
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From: "When the going gets weird, the weird turn pro." -RIPHST
Car: 1991 RS
Engine: 383TBI Fastburns and 2"TB
Transmission: T56 held up by Spohnstuff
Out of curiosity- which gasket? head or intake or??
S-D
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Old Mar 20, 2003 | 11:27 AM
  #22  
AlabamaThunder's Avatar
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From: Fyffe/Rainsville, Alabama
Car: 1986 IROC-Z, 1990 RS
Engine: 383 Stroker TPI, 350 About To Go In
Transmission: 700R4 W/ Shift Kit And Stall, 700R4 W/ Shift Kit
Head....

weird thing though...

My bro said it might be it so we went ahead and done it..

Fixed it right up
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