C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Leaking water pump?

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Old Dec 27, 2006 | 10:36 PM
  #1  
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From: Olympia Washington 91 Z07 Coupe, 6spd, Borla Exhaust, Perf. Ignition, K&N Filter
Default Leaking water pump?

Just wondering what the chances are that my water pump is leaking, it sounds like the thing is making noise like its old, and also im having a problem with collant loss, but thats another thread

Just wondering if anyone knows if the water pumps on the 91 L98 ever leak or if its a very rare problem, also how hard are they to replace?
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Old Dec 27, 2006 | 10:40 PM
  #2  
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I would jack the car up and look at the weep hole and check for coolant stains. It's a easy job for some and hard for others. Bring it down here and I will do it for $150
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Old Dec 27, 2006 | 11:24 PM
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From: Olympia Washington 91 Z07 Coupe, 6spd, Borla Exhaust, Perf. Ignition, K&N Filter
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also what are the signs of a blown head gasket? no smoke out of the exhaust but that coolant is going somewhere just trying to cover all the bases, this problem is driving me mad
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Old Dec 28, 2006 | 01:41 AM
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Default water pump

be careful what pump you replace the original pump with. some aftermarket ones don't clear the pulley.
The pumps go bad somewhere between 65 and 80 thousand miles.
You have to just start at the front and go in, then clean what you can, and assemble as you back out. figure 3 hours, 5 if you are learning.
make sure the water pump is a reverse rotation water pump, and make sure it has a drilled and tapped boss on the top of it. (usually insures it's application specific)
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