Engine smokes for about 10 minutes

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Old 02-22-08, 02:09 PM
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Engine smokes for about 10 minutes

I have a 1980 Chevy LUV that when it first starts when it is cool it smokes for about 10 minutes until the motor is warm it is a white smoke It is an old truck so I was wondering if someone might recommend a stop smoke additive or anything I can put in it or if I should just let it go thanks for your help
 
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Old 02-22-08, 04:22 PM
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if it is white smoke, it is either burning water or maybe brake fluid if it has power brakes. does it run hot; lose water; lose brake fluid? how about trans fluid, if it is an automatic? disconnect the vacuum line to the power brake booster and see if it is wet. if so, your diaphram may be damaged allowing leaking brake fluid into the intake.
 
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Old 02-22-08, 08:43 PM
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Originally Posted by skoalmt1 View Post
I have a 1980 Chevy LUV that when it first starts when it is cool it smokes for about 10 minutes until the motor is warm it is a white smoke It is an old truck so I was wondering if someone might recommend a stop smoke additive or anything I can put in it or if I should just let it go thanks for your help
try an additive on oil and also and maybe on gas and see what happens sometimes they work pretty good, Yeah being a 1980 you don't want to make too much out of it or put too much time and effort ( or money ) on it.
 
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Old 02-23-08, 09:54 AM
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Originally Posted by mikeTN View Post
if it is white smoke, it is either burning water or maybe brake fluid if it has power brakes. does it run hot; lose water; lose brake fluid? how about trans fluid, if it is an automatic? disconnect the vacuum line to the power brake booster and see if it is wet. if so, your diaphram may be damaged allowing leaking brake fluid into the intake.
Thanks for the reply it doesnt really run hot and the brake fluid looks good no moisture and the transmission looks good radiator looks good.
on the oil and gas additives I was wondering if you might have some suggestions on some good ones to use thanks
 
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Old 02-23-08, 10:14 AM
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Seafoam is supposted to dry out moisture in oil and gas. If you put it in the oil, make sure you get an oil changer soon after as it thins the oil out alot.
 
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Old 02-23-08, 10:54 AM
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You have not posted how many miles are on the engine but it being an 80 it probably has a bunch. IMHO the valve guides are worn and the smoking is coming from the oil that has seeped into the combustion chamber while it was sitting overnight, sludge buildup in the oil passages can also contribuite to this as it doesn't let the oil drain back to the crankcase quickly and pools next to the valve train. The only real solution would be to get some head work done and replace the valve guides. Have a good one. Geo
 
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Old 02-23-08, 11:27 AM
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I'm with the Geoman on this... Worn valve guides - seeping oil..... not a serious issue if all you have is a few minutes of smoking in the early hours (though smoking does cause cancer, but you knew that.... )

If you're not replacing oil every week or so - and everthing else is fine.... and you don't plan on keeping it another 20 years - let her ride.... a little oil in the cylinders might help keep her lubed for a few more miles...
 
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Old 02-24-08, 01:27 PM
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Originally Posted by thezster View Post
I'm with the Geoman on this... Worn valve guides - seeping oil..... not a serious issue if all you have is a few minutes of smoking in the early hours (though smoking does cause cancer, but you knew that.... )

If you're not replacing oil every week or so - and everthing else is fine.... and you don't plan on keeping it another 20 years - let her ride.... a little oil in the cylinders might help keep her lubed for a few more miles...
Hey "thezster" Your not from Ontario by any chance?


Mike.B
 
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Old 02-24-08, 01:44 PM
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That's what I'm thinking I changed the oil and put some Lucas oil in it this weekend will see what happens Thanks
 
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Old 02-29-08, 01:13 PM
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Question

maybe valve guide seals but oil smoke is blue usually!? WHITE smoke usually means water or(from what i've seen-brake fluid).
 
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