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2000 Blazer Water Pump Replacement

cmoore74

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cmoore74 Enthusiast

cmoore74

Posted
Posted

Might be replacing the water pump on the wife's 2000 Blazer (~83k miles). I always remember that whenever you change out the water pump it was a good idea to put in a new fan clutch as well.

 

Well a new water pump is about $57 (reman for $38), but the fan clutch is $77! Any idea if this is still standard? Don't want to drop another $80 if it's not really required.

 

Also seem to recall you want to replace the upper radiator hose as well at the same time ($21).

 

Thanks,

Chris

  • 2 weeks later...
ryank1 Enthusiast

ryank1

Posted
Posted

I would not replace the clutch, but check the hoses for dry rot or soft spots.

DirtyDave Enthusiast

DirtyDave

Posted
Posted

I had to re-seal the water pump on my 98 Sonoma so I did what you're doing and just replaced the factory unit. I figured it would be cheap insurance.

 

The biggest hassle I had was busting the nut loose for the fan. That involved a large adjustable wrench with a pipe over the end and a large hammer to hit said pipe. What a pain in the ass.

 

I did not replace the upper radiator hose or the fan clutch, but I did have to replace a small coolant by-pass hose. The s.o.b. wouldn't come off so I just cut it. They had it at Auto-Zone for not a lot of dollars. I did this job around 50,000 miles and I now have just over 100,000 and no problems with fan clutch, so I'd say it's safe to leave it alone.

 

Other useful tips:

-Don't do this on a hot day. Bees love coolant and they will sting you (learned the hard way).

-Get a piece of cardboard to lay against your radiator. One slip and you could be putting in a radiator as well.

-Look for a large drain pan for your coolant. Then buy one size larger than you think you'll need.

-Have the hose handy.

-Get some red RTV silicone for the gaskets (I smeared a thin layer on mine and they sealed perfectly)

-I'm pretty sure that I had at least one bolt that was in the water jacket and required silicone (my memory is a little shaky...that may have been the 5.0 Mustang I did not too long after my Sonoma)

-coolant + oxygen = big time rust...wash any spilled coolant off your engine

-If you have tree-hugger neighbors, dispose of your coolant properly...not behind your garage or their dog's water dish. :cheers:

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