It doesn't shoot out blue smoke,only on start up,and under hard accelration/WOT I can smell it pretty bad,any idea what it could be/solutions???

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86 IROCZ 5.0 TPI/"new" 700R4 auto with transgo shift kit and vette servo,canary yellow,t-tops,radar detector,tan interior,hidden antenna,tinted windows,taillight blackouts,front end bra,k&n air filters,no cat,full 3" racing exhaust with 40 series flowmaster and chrome tips,2:73 posi rear(soon to be 3:42 or 3:73 posi),1989 IROCZ 16*8 polished aluminum rims

 

mine does that too, but a intake manifold bolt is kind loose or something and oil is seeping out there, do u have any oil anywhere leaking etc.?

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- David
88' GTA 5.7L TPI MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass, Gutted CAT, Flowmaster 80 Series

http://www.geocities.com/david_angel_16

 

No oil leaks just a smell...could it maybe be valve seals??

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86 IROCZ 5.0 TPI/"new" 700R4 auto with transgo shift kit and vette servo,canary yellow,t-tops,radar detector,tan interior,hidden antenna,tinted windows,taillight blackouts,front end bra,k&n air filters,no cat,full 3" racing exhaust with 40 series flowmaster and chrome tips,2:73 posi rear(soon to be 3:42 or 3:73 posi),1989 IROCZ 16*8 polished aluminum rims

 

i have the same year IROC as you with original motor (for now) and i have the same problem. i say it's the seals.

 

My car does the same thing, and im pretty sure it is the valve seals, my freinds 86 does it also, and we are both around 140k so its no big surprise.

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87 IROC-z 305 TPI
Borg Warner T-5 fresh rebuild
10-bolt 3.73 Richmond gears rebuilt GM posi,
formerly BW 9-bolt w/3.45 gears(broke it)
Ported Plenum and Runners Homemade AFPR
ACCEL 8.8 wires, High output coil,and cap & rotor
Bosch platinum + 4 plugs
Ram Air w/ K&N filters,
MAF sensor screens removed, TB coolant bypass
Polyurethane tranny and torque arm mounts
Dynomax catback w/custom tips
K&N oil filter,Mobil 1 synth, Futura GLS Super Sport tires 265/50/15 rear and 235/60/15 front mounted on 86 monte carlo SS rims ,

400 sbc and a 6 spd in the works

 

your valve seals are the culprit of your start up smoke if it's blue. if it starts smoking after 5 to 10 minutes at idle (like sitting at a fast food drive up) then your rings are bad also. with saying you smell it at WOT tells me you do have an oil leak at the rear of your valve covers or your distributor mount gasket. both are hard to see and if it's minor, you won't see anything on the ground cause it all burns off. i have two irocs and have experienced all the above. except for the rings, all are easy fixes by a home mechanic however, replacing valve seals is time consuming and you must have compressed air to fill the cylinder so the valves don't fall.