Confusing oil consumption. Need thoughts
 

The 93 dx airport car has always burned oil, but not noticably. I used to just add a quart every month or so. Last week the bitch starts smoking out the exhaust, and smelling like ----.

I take the head off, take it all apart, and replace the valve seals, headgasket, and timing belt. The back of the valves have alot of built up ---- on them, so those get cleaned out too. So now I shouldn't be burning oil, but the bitch is still smoking. The new spark plugs after 40 miles look good, except there is burnt oil residue on the first couple threads. When I had the head off last week, the pistons looked pretty clean, with only a little bit of blackness in the middles of them. All of them look uniform, with none of them looking worse than the others.

Now that I know the oil isn't entering through the valve seals, it's got to be coming from under the pistons or something, they just don't look like the problem either. I mean, there's only so many places the oil can enter the chamber, burn up and come out the exhaust.

All the pcv ---- is unplugged and open, I even drove with the dipstick out to make sure it wasn't a pressure issue.

Give me some ideas. This is pissing me off.

Re: Confusing oil consumption. Need thoughts
 

how many miles on it? valve guides? :8 ddi u do a compression test/ leak test..

Re: Confusing oil consumption. Need thoughts
 

The car has 170k miles. I attempted to do a compression test before doing the valve seals, but the plug got stuck in the head on the first hole. I'm gonna do another one here shortly.

Re: Confusing oil consumption. Need thoughts
 

Im having oil burning issues at well... things i thought of were the obvious piston rings, valve seals, and bad turbo..... I cant think of anything else

I say compression check will answer your question ;)

Re: Confusing oil consumption. Need thoughts
 

Could have some bent valves in there that arent seating correct which inturn damaged the valve/guide


Compression test will be your answer

Re: Confusing oil consumption. Need thoughts
 

That could be, but wouldn't the new valve seals still seal the oil from passing the stem?

Re: Confusing oil consumption. Need thoughts
 

Hard to say if the valve is damaged

Re: Confusing oil consumption. Need thoughts
 

car still have a cat/stock exhaust? if theirs alot of oil in their it will take a while to burn off. How many miles have you put on it?

Re: Confusing oil consumption. Need thoughts
 

very true. A buddy of mine who totally fucked his oil drain and thought his turbo was junk after I fixed the line car was still smoking like a chimney for a couple days till it all burned off.

Re: Confusing oil consumption. Need thoughts
 

Just another thought as i was pondering the many reasons why my car is smoking and this hit me...

IM still not runing a proper pcv ventilation system.. and thus, may be causeing my smoking..... Brilant i say...

So all im saying is your pcv vlave could be poop thus leading to some crank pressure, thus leading to some blow by, thus your stinky smoke.... I hope this fixes my problem at lease.