I have just finished doing my intake gasket and thats a whole other topic. Before I started the project I noticed it smoked.. more blue than black or white. I figured it was the intake sucking in all the nastys because of the gasket.. so I replaced the gasket. Now it still smokes. Not as bad or as thick.

1000-2000 RPMS no problems
2000-3000 ok but with puff of smoke on RPM DROP
3000- ~3500 large puff"s" of smoke on RPM DROP
Idle-WOT quick let off I a small puff of black (gas) then a puffs of smoke

Vacuum pressure is ~18 taken by a vacuum gauge and off the aux. vac port on the intake. Solid too no bouncing of the needle.

No water or antifreeze seems to be coming out the exhaust when the puffs do.

The cat appears to be gutted by PO

Any ideas on where to start?

 

Valve seals. Reason you get the puff when you close the throttle is, vacuum goes from non-existent, to REALLY high in a hot second. So, sucks oil right down the valve guides.

 

does not seem to have a really distinctive blue tint.Could also be buring other contaminants?

 

^^ +1 on what HeyYou suggested

 

i guess i know what im doing next weekend

 

Has a comp test been done on this motor? wet/dry if so what were the results. If no test has been done I suggest you do one before you take on the valve seals. The valve seals can be replaced on the motor with the right tools.

 

Don't rule out the PCV valve.
I would agree with the seals too, but you can't rule out the cheap stuff either.

 

A compression test has not been done yet. My previous auto instructor did the pcv blowby test. He said it was acceptable. As i went to him for an alignment for $20 bucks.. I didnt know about the smoke then.

I have an air compressor and the adapter to put in the plug hole. So it should not be to bad of a job.

 

Erm, you need a gauge to do compression test. If the auto shop has a leakdown gauge set though, THAT would be ideal, not only do you know exactly how much is leaking out, you also know WHERE it is going.

 

I would expect to spend a day changing the seals, and I would still start with a comp test. Don't drop one of those keepers or you will be pissed, a good pen tip magnet is a must. Yes a leak down test will tell all, read the book thats in the kit yourself so you know whats going on.