Blue smoke
Thread Starter
Racer
Joined: Dec 2020
Posts: 277
Likes: 57
From: Va.
Blue smoke
Engine has 5,200 miles. Has a puff of blue smoke shifting between 2 to 3 and 3 to 4 out of driver side exhaust. Already had guides and seals redone about 2,500 miles ago. 454 engine. Could it be a cracked gasket somewhere or what? I’m not a mechanic. Thanks for any help.
Last edited by 7T3stinger; Mar 19, 2023 at 04:26 PM.
Race Director
Joined: Sep 2001
Posts: 10,560
Likes: 439
From: Wellington, FL
St. Jude Donor '11 thru '25
If by chance the intake manifold was off, be sure it's torqued properly. Easy to check. Been there, done that. Believe me there are mechanics out there who think they can torque w/o a torque wrench.
Thread Starter
Racer
Joined: Dec 2020
Posts: 277
Likes: 57
From: Va.
well it actually had the blue puffs before I had the guides and seals done. So there has to be something else going on.
Instructor
Joined: Feb 2017
Posts: 121
Likes: 38
From: Billerica Massachusetts
Typically blue smoke out exhaust = oil burning, black smoke = fuel( excessively rich mixture), white smoke = coolant burning. I would remove the spark plugs and see what they look like. Good luck.
Thread Starter
Racer
Joined: Dec 2020
Posts: 277
Likes: 57
From: Va.
yea. I do know the smoke types. This is on driver side. Puff of blue. Wondering if it could be a head gasket or intake gasket.
Thread Starter
Racer
Joined: Dec 2020
Posts: 277
Likes: 57
From: Va.
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Pro
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From: Carson Valley
Thread Starter
Racer
Joined: Dec 2020
Posts: 277
Likes: 57
From: Va.
Thread Starter
Racer
Joined: Dec 2020
Posts: 277
Likes: 57
From: Va.
Pro
Joined: Apr 2010
Posts: 548
Likes: 229
From: Carson Valley
Oil on the plugs or black soot from burning the oil.
There's a picture in this thread:
https://www.corvetteforum.com/forums...rning-oil.html
Though I think he has a more serious problem than you do.
Also, which cylinder it is, or how many.
That may help narrow down the problem.
There's a picture in this thread:
https://www.corvetteforum.com/forums...rning-oil.html
Though I think he has a more serious problem than you do.
Also, which cylinder it is, or how many.
That may help narrow down the problem.
Thread Starter
Racer
Joined: Dec 2020
Posts: 277
Likes: 57
From: Va.
Oil on the plugs or black soot from burning the oil.
There's a picture in this thread:
https://www.corvetteforum.com/forums...rning-oil.html
Though I think he has a more serious problem than you do.
Also, which cylinder it is, or how many.
That may help narrow down the problem.
There's a picture in this thread:
https://www.corvetteforum.com/forums...rning-oil.html
Though I think he has a more serious problem than you do.
Also, which cylinder it is, or how many.
That may help narrow down the problem.
Pro
Joined: Apr 2010
Posts: 548
Likes: 229
From: Carson Valley
Could be though I'd be surprised if it did it before and after the heads were off for new guides and seals.
Another thread here mentions heads with screw in studs that go into the intake runners. You may have one of those leaking.
It's a simple matter of pulling the screw in stud and putting some sealant on the threads, if your heads are constructed like that.
If you find one plug with oil on it it would indicate which stud it is.
Does the car smoke while decelerating?
Have you contacted the engine builder about this? I'd be curious what they'd have to say.
Another thread here mentions heads with screw in studs that go into the intake runners. You may have one of those leaking.
It's a simple matter of pulling the screw in stud and putting some sealant on the threads, if your heads are constructed like that.
If you find one plug with oil on it it would indicate which stud it is.
Does the car smoke while decelerating?
Have you contacted the engine builder about this? I'd be curious what they'd have to say.
Thread Starter
Racer
Joined: Dec 2020
Posts: 277
Likes: 57
From: Va.
Could be though I'd be surprised if it did it before and after the heads were off for new guides and seals.
Another thread here mentions heads with screw in studs that go into the intake runners. You may have one of those leaking.
It's a simple matter of pulling the screw in stud and putting some sealant on the threads, if your heads are constructed like that.
If you find one plug with oil on it it would indicate which stud it is.
Does the car smoke while decelerating?
Have you contacted the engine builder about this? I'd be curious what they'd have to say.
Another thread here mentions heads with screw in studs that go into the intake runners. You may have one of those leaking.
It's a simple matter of pulling the screw in stud and putting some sealant on the threads, if your heads are constructed like that.
If you find one plug with oil on it it would indicate which stud it is.
Does the car smoke while decelerating?
Have you contacted the engine builder about this? I'd be curious what they'd have to say.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,113
From: Crossville TN
Oil smoke only from driver's side exhaust indicates leakage into left bank intake manifold or cylinder blow-by on left bank of engine. With new build, most likely intake sealing problem.
Thread Starter
Racer
Joined: Dec 2020
Posts: 277
Likes: 57
From: Va.
