2004 Duramax water pump replacemant... - 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 17 (permalink) Old 11-07-2012, 07:30 AM Thread Starter
 
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2004 Duramax water pump replacemant...

School me.. What can I expect? Any special tools needed? Time, how long should it take me ? I have a garage and tools to work with just wanted to know if I had any suprises before I jump into this. Thanks guys...
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post #2 of 17 (permalink) Old 11-07-2012, 07:40 AM
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its not to bad i did one in my 05 in about 4hrs with beer haha. you need a holder for the fan pulley, a crank holder and a large breaker bar to take off the balancer and a good size torque wrench to put on, its not a hard job if you know your way around a truck a little bit, there are diy threads on it if you search them

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post #3 of 17 (permalink) Old 11-07-2012, 01:09 PM
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We stock the Water Pumps (they come with all the gaskets and seals needed) Found at the below link:
Duramax Water Pump 01-05 LB7/LLY with gaskets
Also here's the link to the flywheel lock.
Duramax Flywheel Lock
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post #4 of 17 (permalink) Old 11-07-2012, 01:13 PM
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^^ their waterpump kits a good stuff! thats what i put in and its cheaper than buying a pump and then going to gm to get the seals!!!

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2005 LLY: S&B cold air, s&b mouth piece, 3in wrapped dp, 5in straight pipe to 7in miter, efi live DSP5 from husker diesel switched with insight, suncoast gmax 5-3 built by husker diesel 18in xd hoss -12 offset wrapped in nitto terra grapler 285s, tinted, smoked recon genius lights , smoked lights, Kryptonite tierods and centerlink, nicktane cat adapter-SOLD
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post #5 of 17 (permalink) Old 11-12-2012, 03:56 PM Thread Starter
 
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How the heck do you hold the fan pully to get the fan nut loose?
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post #6 of 17 (permalink) Old 11-12-2012, 04:17 PM
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Leave the belt on, get a pipe wrench and fit it to the nut, then smack wrench with the hammer a few good hits should take the fan loose.

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post #7 of 17 (permalink) Old 11-12-2012, 06:25 PM
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you need a torque wrench that will go up to like 285 I think something crazy like that for the harmonic balancer

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post #8 of 17 (permalink) Old 11-13-2012, 07:19 AM
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Quote:
Originally Posted by low96hb View Post
How the heck do you hold the fan pully to get the fan nut loose?
No need to hold it. Use an air chisel with a skinny bit on the left side of the nut. A few seconds and it comes right off.

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post #9 of 17 (permalink) Old 11-13-2012, 01:32 PM Thread Starter
 
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Ok stupid question here, Is the fan nut a RH or LH to loosen? Yea I know rookie question right......I have beat pulled tugged hammered and cussed the hell out of it and am having no luck.... I'm only about 10' from the tourch in the corner and have really thought about useing it!!!!!!!....eh also I have the starter off and have turned the motor/flywheel a full turn and have only found 3 small half drilled holes, is this what I use to hold the motor while I break the big nut at the bottom loose?
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post #10 of 17 (permalink) Old 11-13-2012, 01:40 PM
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Quote:
Originally Posted by low96hb View Post
Ok stupid question here, Is the fan nut a RH or LH to loosen? Yea I know rookie question right......I have beat pulled tugged hammered and cussed the hell out of it and am having no luck.... I'm only about 10' from the tourch in the corner and have really thought about useing it!!!!!!!....eh also I have the starter off and have turned the motor/flywheel a full turn and have only found 3 small half drilled holes, is this what I use to hold the motor while I break the big nut at the bottom loose?
Its a normal thread; lefty-loosey.

If you have an air hammer, usually a couple hits on the corner of the fan nut will break it free.

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