COOLANT LEAK. help needed!!! - Chevy and GMC Duramax Diesel Forum
01-04.5 LB7 Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

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post #1 of 9 (permalink) Old 10-31-2010, 01:01 PM Thread Starter
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Cool COOLANT LEAK. help needed!!!

I have a 2001 Duramax thats leaking coolant somewhere on front of the drivers side part of the engine..there seems to be no signs that the water pump is bad..where else could it be coming from??

2001 Ext cab Duramax.
PPE HOT+2 ET,PPE Boost valve, AFE Intake, FASS 150,mbrp 5" exhaust,PPE tie rod sleeves.Going on 280,000 miles and wantin' more! :rockin

2004 Dodge cummins 6speed.
Edge juice W/ hot unlock + smarty+ Fass 150+ Super B+ heavy foot= BLOWN UP:booboo

1997 5spd 12 Valve. 13mm pump, 370 marine injectors, Super B ( wants more). A true Brute.
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post #2 of 9 (permalink) Old 10-31-2010, 01:54 PM
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is it leaking between the head and block? could be a blown head gasket

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post #3 of 9 (permalink) Old 10-31-2010, 04:18 PM
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take a real close look at the waterpump.... Sometimes they dont leak very much. I have been through a few waterpumps.

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post #4 of 9 (permalink) Old 10-31-2010, 04:52 PM
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Water pump .the tubes running to the water pump. Hgs, the turbo coolant return line. If you can't find it get some tracer dye and a uv least light.
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post #5 of 9 (permalink) Old 10-31-2010, 05:30 PM
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turbo return line, or the pipe running from the crossover pipe to the return pipe just before the water pumpm dunno what its called....

2001 LB7 broken again. this time it's in the front yard.
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post #6 of 9 (permalink) Old 10-31-2010, 06:11 PM
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Thermostat housing

Take a look at your thermostat housing. I have a leak there from the aluminum warping. Also look at the down pipes from the housing where they go into the block.

2001 2500 HD BROKEN

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post #7 of 9 (permalink) Old 10-31-2010, 06:13 PM
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waterpump man been there done that
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post #8 of 9 (permalink) Old 10-31-2010, 06:33 PM
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Just did my water pump. It's not too bad

2004.5 Chevy 2500HD LLY Crew Cab 4wd/ Banks Six Gun w/ speed loader,banks IQ banks ram air and 4" exhaust no cat, Ready lift torsion keys. 250k miles and counting
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post #9 of 9 (permalink) Old 11-01-2010, 09:29 AM
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It's probably coming from the weep-hole on the bottom of the water pump housing. Time for a new one. They aren't too bad.

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Originally Posted by TheStepChild View Post
You want your exhaust to be like a fart. You can't see it but you know the effects of it.

If you can see your fart you got problems. If you can see your exhaust ...
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