White Smoke!!!!!!!#$%&##!
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Senior User
Joined: Jan 2002
Posts: 492
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From: Spokane WA, USA
White Smoke!!!!!!!#$%&##!
This is a weird one guys, please give me some advice.
Here's the symptoms:
Shut off the engine after warmed up, wait over 10 minutes and restart: White smoke cloud out the exhaust (Reeks of fuel)
Shut off the engine after warmed up, wait over 60 minutes and restart: No smoking whatsoever, no fuel smell
Shut off the engine after warmed up, wait less than 5 minutes and restart: No smoking whatsoever, no fuel smell
Start the engine cold: No smoking whatsoever, no fuel smell
Engine burns no oil.
What's the deal? Only smokes between 10 min and 1 hour at restart
Here's the symptoms:
Shut off the engine after warmed up, wait over 10 minutes and restart: White smoke cloud out the exhaust (Reeks of fuel)
Shut off the engine after warmed up, wait over 60 minutes and restart: No smoking whatsoever, no fuel smell
Shut off the engine after warmed up, wait less than 5 minutes and restart: No smoking whatsoever, no fuel smell
Start the engine cold: No smoking whatsoever, no fuel smell
Engine burns no oil.
What's the deal? Only smokes between 10 min and 1 hour at restart
Thread Starter
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Senior User
Joined: Jan 2002
Posts: 492
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From: Spokane WA, USA
White Smoke!!!!!!!#$%&##!
yea, I thought about that- 2 things though:
1) why does it smell of fuel?
2) if it was antifreeze, wouldn't I see smoke all the time/or some other time?
Thanks for you input, this thing is driving me crazy. I don't think it did this with the old 1bbl carb. Also maybe it has something to do with the elec. choke, or vaccuum or something.
1) why does it smell of fuel?
2) if it was antifreeze, wouldn't I see smoke all the time/or some other time?
Thanks for you input, this thing is driving me crazy. I don't think it did this with the old 1bbl carb. Also maybe it has something to do with the elec. choke, or vaccuum or something.
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Senior User
Joined: Jan 2002
Posts: 492
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From: Spokane WA, USA
White Smoke!!!!!!!#$%&##!
thanks guys, I think maybe I will try to retorque the head- can someone send me a .jpg of the torque sequence for the 300 head- and the torque values. If somebody has them handy.
Thanks
Thanks
Posting Guru
Joined: Jan 2003
Posts: 1,507
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From: Magrath
White Smoke!!!!!!!#$%&##!
How warm is warmed up?
My GMC will put out what appears to be white smoke if I only run it for about 10 minute to 20 minutes at a time. What it actually is is steam from moisture built up in the exaust system as my GMC doesn't get run more than 4000 miles a year.
The solution I was told was either drill a couple of drain holes in the muffler or run it for about an hour once a week.
The unburned fuel might be the fuel smell.
Another note, Watch your antifreeze levels close, just incase
My GMC will put out what appears to be white smoke if I only run it for about 10 minute to 20 minutes at a time. What it actually is is steam from moisture built up in the exaust system as my GMC doesn't get run more than 4000 miles a year.
The solution I was told was either drill a couple of drain holes in the muffler or run it for about an hour once a week.
The unburned fuel might be the fuel smell.
Another note, Watch your antifreeze levels close, just incase
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Senior User
Joined: Jan 2002
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From: Spokane WA, USA
White Smoke!!!!!!!#$%&##!
oh, also- if it is the gasket, what is the best replacement for it. I will try a compression check- what should the accceptable psi be on the cyls? Within 10% of each other?
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Senior User
Joined: Jan 2002
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From: Spokane WA, USA
White Smoke!!!!!!!#$%&##!
hey guys, what about fuel pressure - seems like if it sits over an hour the pressure bleeds off and won't smoke. But if I come out ½ after shutting the engine off the pressure is still there and its flooding. Just a stab in the dark
Posting Guru
Joined: Jun 2002
Posts: 1,288
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From: redding U.S.A.
White Smoke!!!!!!!#$%&##!
mmm could be that, but I wouldn't think that it would take that long to bleed off pressure, and if a regulator is shot, it'll probably do it constantly, because they really don't warm up too much. It could be that its sticking perhaps... I would check fuel pressure.
Sounds to me like a head gasket. Double check to make sure its fuel and not antifreeze
Sounds to me like a head gasket. Double check to make sure its fuel and not antifreeze
Junior User
Joined: Oct 2002
Posts: 72
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From: Danvers MA, USA
White Smoke!!!!!!!#$%&##!
ive always found with a head gasket problem my dipstick gets spicy brown mustard syndrome, i only read about threee posts to your question, so maybe you allready found the problem, but check the dipstick if thats what the crew thinks you have a problem with..... makes sense about the swell thing though, i read about someones prob with their trans shifting hard only in rainy weather so i guess weather and temp changes def do affect things
Posting Guru
Joined: Apr 2000
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White Smoke!!!!!!!#$%&##!
You have to do a compression check and dipstick check. Depending on where gasket is leaking, you may get water in cylinder and/or in oil.
Unfortunately you may even have a cracked head or block.
Unfortunately you may even have a cracked head or block.
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