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#1 |
72 chevys 4 life
Join Date: Aug 2008
Location: Crescent,Ok
Posts: 406
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smoke is bad?
started up my other 71 for a while and drove it then when i pulled back into the driveway there was some smoke coming out of the passenger side valve cover breather. What does that mean im sure its bad. and it has plenty of oil in it
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#2 |
I have a radical idea!
Join Date: Jan 2005
Location: Sweet Home Alabama!
Posts: 6,513
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Re: smoke is bad?
Was is doing it while running? Smoke from the valve cover when running is a sign of ring blowby. If it did it after it was cut off, it could be oil from a leak burning off and sometimes condensation evaporating will do that, especially if it has been sitting awhile.
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'67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club! |
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#3 |
72 chevys 4 life
Join Date: Aug 2008
Location: Crescent,Ok
Posts: 406
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Re: smoke is bad?
i didnt notice as much when it was running just mainly when i shut it off. the truck had been setting for 2 years or so but i just recently got it started up and running good the motor runs real strong still
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#4 |
Gone to greener pastures
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Location: Gateway to the Delta
Posts: 7,354
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Re: smoke is bad?
You may want to check your PCV valve. If it's not working the crankcase pressure is going to take "the path of least resistance", which would be out the breather.
A bad PCV valve can also cause oil leaks if the crankcase pressure gets high enough.
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#5 |
I have a radical idea!
Join Date: Jan 2005
Location: Sweet Home Alabama!
Posts: 6,513
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Re: smoke is bad?
x2
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'67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club! |
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#6 |
Senior Member
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Location: Parker, Texas
Posts: 685
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Re: smoke is bad?
Did your truck reach full operating temp? You may have just had some condesation inside the engine.
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#7 |
Registered User
Join Date: Dec 2008
Location: Claremore OK
Posts: 52
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Re: smoke is bad?
Just to add to what everyone else has said, if it sat for awhile, it could be a stuck ring. I'd run a compession check.
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68' SWB 355 CID since 1987 89' S15 4WD 4.3 08' VTX 1300R 08' Chevrolet HHR (Wife's ride) "That man right there is the best sprint car driver in the whole ---damned country!" 1974- Indianapolis- AJ Foyt pointing out Jan Opperman in the garage. |
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#8 |
72 chevys 4 life
Join Date: Aug 2008
Location: Crescent,Ok
Posts: 406
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Re: smoke is bad?
hmm...havent checked the pcv...its if it rattles its good right?
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#9 |
72 chevys 4 life
Join Date: Aug 2008
Location: Crescent,Ok
Posts: 406
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Re: smoke is bad?
and yeah it was at operating temperature
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