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burning oil, why?

g-magoo

Ready to race!
nope it’s getting burned up somewhere, i haven’t pulled plugs, you mean spark plugs correct? also what would i be looking for with those

also yes there is smoke from the exhaust everytime i barely even rev it a lot comes out

Yeah, spark plugs. You're going to be checking for residue/deposits or even a shiny black coating. Google image search: oil fouled spark plug.

Personally though, I wouldn't go solely off of the spark plugs. I'd do a compression test or have one done. Low compression #s on any or all cylinders would more than likely mean the rings are letting oil into the combustion chamber(s). If compression is good and solid across the 4 cylinders, then the oil is coming from somewhere else; possibly valve stem seal(s) or maybe even the turbo is leaking.
 

mk6alex

New member
Yeah, spark plugs. You're going to be checking for residue/deposits or even a shiny black coating. Google image search: oil fouled spark plug.

Personally though, I wouldn't go solely off of the spark plugs. I'd do a compression test or have one done. Low compression #s on any or all cylinders would more than likely mean the rings are letting oil into the combustion chamber(s). If compression is good and solid across the 4 cylinders, then the oil is coming from somewhere else; possibly valve stem seal(s) or maybe even the turbo is leaking.
okay thankyou, i’m doing compression test tomorrow
 

mk6alex

New member
Yeah, spark plugs. You're going to be checking for residue/deposits or even a shiny black coating. Google image search: oil fouled spark plug.

Personally though, I wouldn't go solely off of the spark plugs. I'd do a compression test or have one done. Low compression #s on any or all cylinders would more than likely mean the rings are letting oil into the combustion chamber(s). If compression is good and solid across the 4 cylinders, then the oil is coming from somewhere else; possibly valve stem seal(s) or maybe even the turbo is leaking.
just did compression test each cylinder was around 180 psi. i do need new spark plugs though.
 

mk6alex

New member
Have you checked PCV? Are you reading the oil levels on a hot engine or cold?
both, it’s just going after 300 miles. and i just replaced the PCV valve thing for $40, but there is still a lot of oil in the pcv hosing so i’m just going to replace the whole system
 

Joe_Mama

Autocross Champion
40$ for a PCV ? Did you get a generic one?
 

g-magoo

Ready to race!
just did compression test each cylinder was around 180 psi. i do need new spark plugs though.
That's good news for you.

both, it’s just going after 300 miles. and i just replaced the PCV valve thing for $40, but there is still a lot of oil in the pcv hosing so i’m just going to replace the whole system
You said you replaced it in the first post, however a $40 PCV is a red flag... most lower tier/generic brand parts can absolutely work with no issues, but I have seen many of the cheaper "new" parts fail immediately or be faulty before even being installed. You're normally going to be in the $150+ range when purchasing an OE/OEM PCV.
 

kosmaras

Passed Driver's Ed
Going to be one of 4 things and they should be evaluated in the following order:

- PCV -> Just replace with new and see what the impact is.
- Rings -> This can be confirmed by a leak down test, compression only tells you part of the story.
- Valve seals -> Evaluate how much oil burning smoke occurs at a cold start. If that's when you see an increase in oil smoke it could be from oil getting past the valves and sitting on the pistons over night.
- Turbo -> If leak down is good, it's likely your turbo seals. Not uncommon for stock IHI's to go bad and oil burning is a symptom of that.
 
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