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Old 01-25-2013, 10:20 PM   #1 (permalink)
Heat Sink
Join Date: Sep 2012
Location: Atlanta,GA
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need help white smoke

my 95 starting blowing thick white smoke out the exhaust today about 15 minutes from home today made it home ok but it now runs ruff like its down a cylinder, coolent was also low and oil was 2qts over full which i never over fill my oil and it leaks out the rear main, but oil was black and smelled like diesel fuel. is this the sign of a blown head gasket and or a cracked head and if so what should i expect durning tear down? and at 300K would it be worth it to fool around with this engine? Thanks to all your your help and comments

1995 K1500 Silverado EXT short bed. 4L80E auto. green in color
L56 6.5L turbo Diesel (S)
Family owned 3rd owner

current mods:
Derale 16 pass -8AN oil cooler with black fittings and SSbraided hoses
SSdieselsupply PDM heat sink with gray pdm #9 resistor.
Duel LP relay mod with push to prime
Power master high tq starter
130gpm water pump & duramax fan

Last edited by meangreen1500; 01-25-2013 at 10:22 PM.
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Old 01-26-2013, 12:52 AM   #2 (permalink)
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Join Date: Apr 2009
Location: Oklahoma
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Sounds like a headgasket to me. Big leaks are usually gaskets, slow leaks are block or heads.

Take the serp belt off then take the coolant crossover off and see if a head bubbles, then you will know which side to pull.


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