Okay, I have never removed either of those. I know how to do it, as it seems rather straight forward. My question is, will I need to drain the cooling system to remove either of these? The Chilton's manual I have says nothing about it, but I know when I worked on my rocker arms before I pulled one of the hoses and a bunch of antifreeze came out. Thanks

Matt

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irocet@hotmail.com

drive.to/Stang_Kilr

88 IROC-Z -- 350 L-98, 700R4, Flowmaster, K&N, MAF Sceens Gone, Airfoil, March Pullies, Comp Cams Magnum 1.6 Roller Rockers, Accel U-Groove Plugs, Accel 8.8 mm Wires, Hypertech Cap & Coil, Hypertech Chip, Hotchkis Strut Tower Brace, One Loud Stereo!

 

4 10mm bolts hold the TB on. Then you have to remove the throttle cable. That will make the TB loose if you want to take the plenum off now you can. To actually remove the TB, you have to disconnect the vacuum connection, TPS, IAC, heater hose, and some other emissions crap.

Now for the plenum, they are torx. Don't remember what size. But there are around 8 of them i think?? Then you just wiggle the plenum out . Oh yea, you have to disconnect a plug at the bottom of the plenum and the line that runs to the power brakes.
Coolant will come out when you remove the heater hose. Not that much though
Good luck

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91 Formula
305 TPI 5speed
1LE/G92/WS6
w/GTA gfx,rims,hood

Paxton 10lb blower, SLP airfoil, ported/polished plenum, March pulleys, Crane AFPR(43psi),Crane Gold 1.6rrs,MSD coil,MSD6AL, Holley 9mm wires, fastchip, Bosch O2sensor, SLP headers & catback,short shifter,3:73s w/Auburn posi,160* t-stat,JET 195* fan switch, Macewen white face gauges, Autometer gauges, Zoom hi-performance clutch.

[This message has been edited by theformula (edited February 02, 2001).]

 

I took mine off to replace my egr valve. Your tb, in stock form, does have a coolent passage in it, but because it is one of, if not the, highest part of your coolent passages only a little will come out when you dissconect it without draining first, if any at all(make sure to do this on a cool engine). I opted not to drain my system for this process, so insted I just had a little tupperware container ready to catch the small amount of run-off that there was so it wouldn't end up on my garage floor. Coolent is highly toxic and isn't somthing you want your dog or your little bro to go licking up while your out on the test drive. It isn't brain surgery, but make sure to re-connect all of the vacum hoses and sensors when it goes back together. I hope this helps.

 

The torx bolts for the plenum are t-40, the TB is 10mm. You do not have to drain the cooling system. You will have to buy new gaskets for the TPI though.

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission
Borg Warner 7.75" 9 Bolt Rear End

Current Mods: LT4 Hot Cam, Comp Cams 1.52:1 Roller Rocker Arms, Edelbrock TES 1 5/8" Headers, Hooker 3" Aerochamber Cat-Back System, Performance Resource Chip, Accel Ignition Coil, Cap, Rotor, 8.8mm Wires, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET (w/o LT4 cam): 14.32 @ 97.7mph
(corrected for elevation)

7.5" 10 Bolt with 3.42s soon to come!

 

Thanks for the info. I pretty much knew everything about taking the thing apart, but was unsure of the coolant. When I had the one hose off before, I didn't stand around to find out how much coolant came out. I just saw it start to leak out and shoved the hose back on the fitting. Oh well, thanks for the help guys.

Matt

------------------
irocet@hotmail.com

drive.to/Stang_Kilr

88 IROC-Z -- 350 L-98, 700R4, Flowmaster, K&N, MAF Sceens Gone, Airfoil, March Pullies, Comp Cams Magnum 1.6 Roller Rockers, Accel U-Groove Plugs, Accel 8.8 mm Wires, Hypertech Cap & Coil, Hypertech Chip, Hotchkis Strut Tower Brace, One Loud Stereo!