White/blue smoke on start up

[scoob]

Hey guys,

So the situation is on start up the car will blow a reasonably large cloud of white/blue-ish smoke out of the exhaust. The car does not blow any smoke while normal driving or under load. The motor has used oil from day 1 but at first the engine builder and myself thought it was just the rings seating.

The motor has been rebuilt in the last 6000kms with oversized wiscos etc.

There is a small amout of oil in the intercooler piping even though the turbo has been freshly rebuilt by Steve Murch - Although I dont think it is the turbo as it would then always blow smoke especially under load.

Now the engine builder thinks that the culprit is the valve guides and said he will pull the heads off and replace them if needed if I pull the motor.

Just after some more opinions for things to check before I go through the hassle of pulling the motor.

Cheers,

Scoob

[SpeedySub]

My 2 cents worth: The cars that I have had where this happens its always been wore valve guides letting oil in, but they have always been inline 4's not a flat 4 so not sure if it does the same thing with the position of them.

[ADIKT]

Common with forged engines brock. My Coupe did the same. I know of others which do it.

[scoob]

 ADIKT said:

Common with forged engines brock. My Coupe did the same. I know of others which do it.

What part bro? I hear that built engines often use more oil but surely not the smoking? Also I think the amount of oil being used would be a bit more than would be tolerated even if it is a forged engine??

[ADIKT]

http://clubsub.org.nz/forum/archive/index.php/t-39919.html

[scoob]

Hmmm sounds like a lot of people get it but if the builder recons he will pull it apart and check for me maybe I should just do it..

[Guest]

Yep common as oil pools in the bottom of the cylinder and burns off on start up. Valve guide seals are 30min job just get one of those sickdogmagic snapon pushon tools.

[scoob]

 evowrx said:

Valve guide seals are 30min job just get one of those sickdogmagic snapon pushon tools.

30 min job? can get in there with the motor in the car? That would be ideal!

[Guest]

Oh hell no definitely with dropping engine.

[scoob]

 evowrx said:

Oh hell no definitely with dropping engine.

Hell no as in don't drop the engine?

[Guest]

Hell no as in you will need to drop engine wouldn't try it with engine in.

[Johnnynz]

I get the smoke puff on startup with a forged engine. But if your builders gonna do it cheap/free why not.

[scoob]

Hey guys sorry for the late reply. Sounds like lots of people have this occurring and sounds 'normal' but I would really rather not have it.. So motor is almost out and will go and drop it to the builder to see if he can sort the problem. Will let you know what he finds when I get around to giving it to him!