blue smoke GMC Syclone

[87targa]

hey guys,

tyring to help out a buddy. he has a Syclone and it's smoking out of the valve cover hole and the exhaust. it's a tint of blue. Burning oil.

now my question is, what could the smoke out of the valve cover be a sign of?

he had a person build his engine about a year ago. so it's supposed to be fully built.

later

 

[johnathan1]

Blow-by...

 

[87targa]

that's what i thought it would be. just trying to confirm.

 

[johnathan1]

A small amount is normal...a compression test will tell you a lot.

 

[MKIIINA]

werent the cyclones turbo? if so could be on its way out

 

[p5150]

sounds like his piston rings are gone

 

[87targa]

at first he thought it was the turbo. he pulled it and got it rebuilt so the turbo is fine. we will do a compression test tomorrow and see if it's the rings.

it's not a little smoke it's like puff you can't see the motor...not that bad but it just doesn't look normal

yea the syclone is a turbo 4.3L v6. it was faster than lots of the super cars back in the day. i believe the motor is similar to the grand national

 

[QWIKSTRIKE]

sounds like his piston rings are gone

in a nut shell 1st prize answer

 

[suprarich]

That 4.3L v6 motor is a 350 with the 2 back pistons cut off. Nothing like a 3.8L grand national motor. Stout little iron motor however, just was never intended to be a turbo motor.

 

[mdr40z]

I'd say rings too, maybe even a broken one.... fast little ride for what it is

 

[Syris]

shouldnt this be in OT?

 

[Nick M]

That 4.3L v6 motor is a 350 with the 2 back pistons cut off. Nothing like a 3.8L grand national motor. Stout little iron motor however, just was never intended to be a turbo motor.

That is the GM way.

 

[Reign_Maker]

Smoke in the valves... Hmmmm... Anyone consider it may be the PCV system not evacuating that out? I know as Supra owners, we jumped to the worst possible conclusions, and rightfully so, however, my GMC Sierra was doing the same thing, turns out I had a bad PCV, replaced it, no more smoke...