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Smoke From New Engine

Abo Bob

By Abo Bob,
in Engines & Forced Induction

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Abo Bob Grand Master

Abo Bob

Posted
Posted

Hey guys here is my issue,

On stone cold start ups only I get smoke out of the exhaust which I'm pretty sure is burning oil. It lasts about 3 minutes then goes away. Car runs fine otherwise. It's not condensation, there is enough smoke to fill the whole garage.

Engine is about 4000k's old.

Didn't get this smoke at run in or in the time after that before now. Basically I put some 10w60 oil in there for about 500km's cos that's all I had handy and that's when it started. I changed back to 10w40 and still the same. I thought maybe I had overfilled it but tried with less at last change and no difference.

My catch can doesn't go back into the intake.

I can't think of anything else atm.

Thanks.

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danielson Proficient

danielson

Posted
Posted (edited)

if you boost up, does it go away? if so, could be valve guide seals. if it smokes more on boost, could have burnt oil rings..doubt the rings because it goes away...maybe your cooler is catching oil when motors not running, and suckn it in when you first start up. which means, turbo seals... OR etc etc etc..... check the plugs, this a wasy to see if its being burnt IN the engine or not

Edited by danielson
wrxhoon Grand Master

wrxhoon

Posted
Posted

If its blue smoke it doesn't sound good Adam. I dont think the oil has anything to do with it. Are you sure it goes away after warm up ?

Any blue smoke under hard ecceleration? Try going down a log hill in a suitable gear so it maintains speed at high rpm ( above 5000 if possible), whe you get to the bottom of the hill give it full throtle and watch at the rear for blue smoke. Watch your oil consumption closely to see if sge uses more than before .

Abo Bob Grand Master

Abo Bob

Posted
  • Author
Posted

It definitely goes away and it's like a switch.

It goes:

Start engine, exhaust is normal for about 20-30 seconds then smoke comes out and it smells bad. About 3 minutes later it just stops completely.

I will try what you say Jerry. I'll also check out my intake pipes and cooler if possible.

dezz Grand Master

dezz

Posted
Posted

you mentioned putting 10w 60 in....i've been using 10w 60 since i got my car from japan, (7000kms ago) Castrol R 10W 60 went in at compliance, and again after 5000kms and my car has never blown any smoke...

just mentioning that as i dont see that oil being the cause of your problem :ermm:

wrxhoon Grand Master

wrxhoon

Posted
Posted

By what you say it sounds like you have oil sitting in the pipes and as soon as she burns it, she is fine. Where does the oil come from ? It could very well br the turbo seals leaking ever so little, oil drops in the dump and sits there until you start it up and burn it. The worry here is that its there ( smoke ) for 3 minutes !

I'm sure it wouldn't be stem seals ( not when you have just replaced them ). It shouldnt be the engine either, as its all new and the rings must have bedded in because you didnt have the smoke before. You can easily eliminate the engine by doing a leakdown test, any problems there will show up.

PHATR32 Grand Master

PHATR32

Posted
Posted

you sure it isnt the turbo? e.g oil leaks slowly from the seals while car is off, when you start the car, its takes 30 secs to start burning the oil, after 3 mins the oil is completly burnt out.

the leak could be so small, it wont cause any smoke while driving. but when you stop it starts collecting up in the exhaust side (or where ever)

steve

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