Smokes after startup
Thread Starter
C6 the C5 of tomorrow
Joined: Nov 2000
Posts: 6,665
Likes: 2
From: Twin Cities Minnesota
Smokes after startup
Now that it's cold out again my Vette is smoking when I start her up. But not right after. She runs fine 5 or 10 seconds then she smokes for 30 to 60 seconds. While she is smoking she runs rougher, like she's running on 7 clyinders. Smoke comes from both exhaust pipes BTW.
The smoke is blue.
This does NOT happen when it's 70 degrees out.
It does not puff imeadiately like valve seals do, but runs a little first.
I've got forged pistons, could this be part of the problem?
The smoke is blue.
This does NOT happen when it's 70 degrees out.
It does not puff imeadiately like valve seals do, but runs a little first.
I've got forged pistons, could this be part of the problem?
Safety Car
Joined: Jan 2000
Posts: 4,143
Likes: 0
Re: Smokes after startup (427V8)
Well.....there's oil gettin' in your cylinders for sure. :yesnod:
Most likely worn valve guides but it could be slight ring wear......I'm sure the smokes there in the summer - it's just not as visivle. :eek:
All cars smoke if the air is cold enough ! :lol:
Anyhow, a car setting for a month or more will smoke a little after startup. :chevy :seeya
Most likely worn valve guides but it could be slight ring wear......I'm sure the smokes there in the summer - it's just not as visivle. :eek:
All cars smoke if the air is cold enough ! :lol:
Anyhow, a car setting for a month or more will smoke a little after startup. :chevy :seeya
Le Mans Master
Joined: Apr 2000
Posts: 5,202
Likes: 10
From: cincinnati ohio
St. Jude Donor '09
Re: Smokes after startup (427V8)
As you know forged pistons expand more than cast or hypereutectic and must be set up loose. They can rock in the bore when cold and make it hard for the oil rings to do their job.
Do you hear piston slap on cold start up? :cheers:
Do you hear piston slap on cold start up? :cheers:
Thread Starter
C6 the C5 of tomorrow
Joined: Nov 2000
Posts: 6,665
Likes: 2
From: Twin Cities Minnesota
Re: Smokes after startup (yellow 72)
Yea it sounds like an F-ing Diesel. I'm wondering if the engine builder set the pistons extra loose to make them survive longer under extreme usage, like nitrous...and when it gets cold the oil rings just can't do their job till the piston heats up?
As you know forged pistons expand more than cast or hypereutectic and must be set up loose. They can rock in the bore when cold and make it hard for the oil rings to do their job.
Do you hear piston slap on cold start up? :cheers:
Do you hear piston slap on cold start up? :cheers:
Melting Slicks
Joined: Apr 2000
Posts: 3,286
Likes: 8
From: San Jose California
Re: Smokes after startup (yellow 72)
As you know forged pistons expand more than cast or hypereutectic and must be set up loose. They can rock in the bore when cold and make it hard for the oil rings to do their job.
Do you hear piston slap on cold start up? :cheers:
Do you hear piston slap on cold start up? :cheers:
Chuck
