smokinrunner

recently rebuild my 22re bored .20 over replaced all seals,valve stem seals new pistons,runs great but smokes bad im lost the only thing i can think of is the valve cover oil separator gasket all cylinders have 155 psi compression any suggestions?

Bassmastry101

iTrader: (1)

Double post?

Year, model, and where is it smoking from?

smokinrunner

1993 smokin bluish out exhaust

smokinrunner

1993 4runner smokin bluish out of exhaust

smokinrunner

sorry about the double post will delete one

Bassmastry101

iTrader: (1)

Since the motor is a fresh rebuild I would think the rings haven't fully seated yet? Does it only smoke when you first start it up or all the time. While your driving or idling?

smokinrunner

bad on start up an for awhile while driving ive put prob three hundred miles on her, i just replaced the valve seals an it still smokes,

Bassmastry101

iTrader: (1)

But after driving it for a whole the smoking stops?

smokinrunner

yes it will smoke for a mile or so but right when you stop an give it some gas it comes back or let it sit for a couple minutes,itr has a new pvc,no vacuum leaks im lost

smokinrunner

it runs great i dont know if its blow by cause the rings or? i read something about the valve cover oil separator if the gasket is bad it could cause it but there riveted in place

Bassmastry101

iTrader: (1)

Try this. Cap off the lines going from the valve cover to the intake and see if it still smokes. The 155 pressure test does seem a little low...should be more like 170-180.

smokinrunner

Which ones the one with the pvc or the one in front going to throttle body?

smokinrunner

So i caped the ports on the intake an took it for a quick drive it stopped smoking after a few minutes i left the hoses on the valve cover open,but now the smoke looks black?

smokinrunner

Ok let it sit went back out started it gave it some gas an it started smoking again but not as bad still has bluish tint

Bassmastry101

iTrader: (1)

Found this, might help. https://www.yotatech.com/forums/f116...e-help-242413/

smokinrunner

so how long do you think it would take to burn all the oil out of the exhaust

Bassmastry101

iTrader: (1)

First you need to figure out why it's burning that much oil. Did you replace the valve seals or did a machine shop do it? Did you figure out if it was the PCV system not working properly?

jammin962

First engine I ever rebuilt, years ago, honda 100 or 125 (4 stroker) ....anyway it ran like a champ but smoked like a train. Problem was that I installed the oil scraper ring upside down so it was pulling oil up into the cylinder instead of scraping it back down away from the combustion chamber. ... maybe a possibility for you?? either way good luck.

smokinrunner

i had tech install the valve seals,its possible i could of anything is possible im getting desperate if i only put three hundred miles on it would i have to do anything to the cylinder walls or could i just get new rings again an throw them in? i caped off those intake lines but i dont know how long it will take for the left over oil to burn out of the system to see if it changed, i followed the ring installation by the book i dont wanna tear the bottom end apart an find it was something stupid like a vacuum line or something

jammin962

ya for sure, eliminate all other possibilities before tearin it down that far again.... especially if you're sure you installed the rings properly (they usually have a mark that goes up).
If it was a flipped ring and the cylinders were bored/honed then you should be good with new rings. Or maybe just flip any rings that are incorrectly installed.

Did you have a trusted and proved shop do the boring? Incorrect piston to cylinder wall clearance could be giving the slightly lowered compression and oil burning. (although rings do need to seat after rebuild for proper compression) my experience would say that 300 miles and multiple heat cycles should have the rings fairly seated by now. ..
...
... lots of possibilities here, as usual eliminate the easier stuff first of course.