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How to Change the Water Pump on a Chevy Silverado

Step-by-step instructions on how to replace the water pump on a chevy silverado truck.
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Re: How to Change the Water Pump on a Chevy Silverado

Postby mike3826 » Mar 25 2012, 3:10pm

Yesterday I changed the water pump, serpentine belt, and AC belt on my 2005 Silverado 4.8L. I kept the thermostat and tensioners from my old water pump. Now the heat doesn't work in the cab and it appears the AC is running all the time. Any ideas on what I did wrong?
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How to Change the Water Pump on a Chevy Silverado

Postby Machster69 » Mar 25 2012, 9:42pm

U got air trapped in heater core... Happens all the time
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How to Change the Water Pump on a Chevy Silverado

Postby Machster69 » Mar 25 2012, 9:48pm

Itll prally self prime eventually... Ive done this many times when servicing my cooling system on my old truck. I think one time i took the heater hose off and put hosepipe on it and forced water into it, instant heat...
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How to Change the Water Pump on a Chevy Silverado

Postby Machster69 » Mar 25 2012, 9:52pm

Or i think u can jus run heater w thermo open(warmed up) and leave cap of reservoir... Think itll work thebubbles out
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Re: How to Change the Water Pump on a Chevy Silverado

Postby natenut » Jun 29 2012, 8:16pm

the thermostat gasket slides onto the rim of the thermostat. I just put mine together and didn't realize this and had leakage. then when i tightened it i broke off one of the bolts. i had to drill and tap the hole again for a larger size bolt! don't laugh!
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Re: How to Change the Water Pump on a Chevy Silverado

Postby ASTE25 » Jun 30 2012, 3:30am

How tight did you think it had to be?
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How to Change the Water Pump on a Chevy Silverado

Postby Machster69 » Jun 30 2012, 8:25pm

U need a torque wrench :)
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Re: How to Change the Water Pump on a Chevy Silverado

Postby natenut » Jul 01 2012, 3:25am

Yeah I know. Lesson learned for sure!
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Re: How to Change the Water Pump on a Chevy Silverado

Postby ASTE25 » Jul 01 2012, 3:28am

I think it's actually a german torque spec: Gute-n-tight!
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Re: How to Change the Water Pump on a Chevy Silverado

Postby ThomasG » May 18 2013, 4:22pm

ASTE25 wrote:I think it's actually a german torque spec: Gute-n-tight!


:D
Like the german saying: "nach fest kommt ab" :D (after tight it's broken) :D
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