Fog of white smoke after oil change

dzig_33 · 04-25-2023, 08:35 AM

91 G8. New rings and honed cylinder last summer. One oil change a few hours after ring job, no issues. Changed oil yesterday, one quart of Quaker State 10W-30. Immediate fog of white smoke on start up. Ran it for about 10 minutes off and on and no change. Not sure what I could have broke loose with only an oil change. I will check compression when I can get back to it. Runs great, easy start, just lots of smoke. Any thoughts?

dzig_33 · 05-16-2023, 02:45 PM

150 lbs of compression. Don't know what to think. If it is valve seal, how much smoke could it make?

Golf cart guy · 05-16-2023, 06:53 PM

Aftermarket Ring set? If so , thats your issue

SteveCSC · 05-18-2023, 10:55 PM

With the complete closure of the throttle plate there is a lot of vacuum, anywhere it can pull in air - including around the valve stem. Not a lot of experience (yet) but the engine I just rebuilt - the valve stem seal was super hard, not sealing well, rings were 'good' over 140 psi compression - smoked like a champ.

04-25-2023, 08:35 AM	#1
dzig_33 Not Yet Wild Join Date: Feb 2008 Location: Hill City, KS Posts: 43	Fog of white smoke after oil change 91 G8. New rings and honed cylinder last summer. One oil change a few hours after ring job, no issues. Changed oil yesterday, one quart of Quaker State 10W-30. Immediate fog of white smoke on start up. Ran it for about 10 minutes off and on and no change. Not sure what I could have broke loose with only an oil change. I will check compression when I can get back to it. Runs great, easy start, just lots of smoke. Any thoughts?

05-16-2023, 02:45 PM	#2
dzig_33 Not Yet Wild Join Date: Feb 2008 Location: Hill City, KS Posts: 43	Re: Fog of white smoke after oil change 150 lbs of compression. Don't know what to think. If it is valve seal, how much smoke could it make?

05-16-2023, 06:53 PM	#3
Golf cart guy Gone Wild Join Date: May 2015 Location: Central Florida Posts: 2,114	Re: Fog of white smoke after oil change Aftermarket Ring set? If so , thats your issue

05-18-2023, 10:55 PM	#4
SteveCSC Not Yet Wild Join Date: Aug 2022 Posts: 51	Re: Fog of white smoke after oil change With the complete closure of the throttle plate there is a lot of vacuum, anywhere it can pull in air - including around the valve stem. Not a lot of experience (yet) but the engine I just rebuilt - the valve stem seal was super hard, not sealing well, rings were 'good' over 140 psi compression - smoked like a champ.
SteveCSC Not Yet Wild Join Date: Aug 2022 Posts: 51

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