Hi all,

Having a problem with my motor that is driving me crazy and I thought maybe if I post something here you all could help me. I installed a rebuilt 1990 Corvette 350 in my car and added a ZZ4 cam, SLP headers and siamezed intake runners, and ported the plenum. Finally got the motor in and everything together. Now here is the problem;

Engine blows lots of oil smoke out tailpipe when you accelerate. It dosent seem to do it on deceleration, idle, or at speed. If you do about 30 and punch it.....no smoke. If you come to a stop and as you pull away, lots of smoke. I have about 100 miles on the motor and it dosent seem to be getting any better. Also it dosen't seem to do it when the motor is cold. Only after it has warmed up. Strange.

The oil pressure is great! The motor runs real nice and strong. Dosen't have a miss or anything. I pull the plugs and the #6 and #7 plug have burned oil on them. Not a good sign. I did a compression check an all cylinders except #6 because I can't get the fitting on there with the headers. All numbers came out between 195 and 205. So that would make me assume the rings aren't bad. I pulled the valve covers to see if maybe the valve seals are popped off. It seems that all the intake ones are still on but all the exhaust ones have popped off and are riding on the top if the valve stem just pelow the rocker arm. That dosen't seem normal. I figured they would still be stuck on the valve guide like the intake ones. Either way if it was in just the 2 problem cylinders I'd say that was it. But it's all 8 exhaust seals.

So I'm thinking that I'll have to take the motor apart again and maybe the oil rings in those two cylinders are bad or broken? Sure is a bummer. I would assume with this much smoke that my problem isn't valve seals anyway.

Any suggestions or other things to look at please let me know.

Thanks, Martin (Trans Damnation)

 

I wonder if you used sealer on the rocker arm studs?
If not, the oil will be sucked into the intake ports.
HTH

 

along with what don said leaking intake is something to consider

 

Well, I pulled the intake......Dosen't look like any oil is getting sucked in there. Reckon that only means one thing. RINGS. Damn! Now just to descide if I just replace the rings in the bad cylinders or just yank it and have it bored and start all over.

Thanks, Martin