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Duramax First Generation: 2001-2004 (LB7) Discuss the first generation (2001-2004 LB7) of the 6.6L Duramax diesel engine & associated components. Engine related discussion ONLY.

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Old 09-13-2007, 02:40 PM   #1 (permalink)
ZRG Motorsports
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Coolant Leak 02 LB7 Pictures

First off Im new to diesels. I can't seem to find where the coolant is leaking from. I leave puddles everywhere I go. Here are some pictures.
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Old 09-13-2007, 02:41 PM   #2 (permalink)
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another
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Old 09-13-2007, 02:42 PM   #3 (permalink)
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The last picture is where I think its coming from. Tell me its not my water pump........... To the right of my belt.
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Old 09-13-2007, 02:42 PM   #4 (permalink)
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T-stat housing?
Turbo lines?
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Old 09-13-2007, 02:43 PM   #5 (permalink)
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1st Guess... Water Pump.
Also looks like a lot of oil is leaking how many miles?
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Old 09-13-2007, 02:44 PM   #6 (permalink)
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T-stat housing is on top of engine with a vent plug hole.
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Old 09-13-2007, 02:45 PM   #7 (permalink)
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177 miles. Injector pump went out about a month ago. Does not leak any oil.
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Old 09-13-2007, 02:51 PM   #8 (permalink)
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Only mods are Hypertech Power Programmer 3, 4 MBRP Exhaust, AFE intake.
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Old 09-13-2007, 03:21 PM   #9 (permalink)
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Water pump would be my first suspect.

Mine had a small coolant leak coming from the driver's side of the engine. It turned out to be coming from the engine oil cooler. The dealer retorqued the bolts and no more leak for the last 10,000+ miles.
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Old 09-13-2007, 03:33 PM   #10 (permalink)
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The last picture looks just like my truck, I just got under it with a flash light with the truck hot, and it looks like it is coming from a hole about 1/4 inch on the driver side, front of the motor behind the balancer close to the block. Is this the water pump??
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