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Re: How do you know if your water pump is going ba (archive)

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Posted by Paul on October 08, 2000 at 23:57:31:

In Reply to: How do you know if your water pump is going bad? posted by Phillip on October 08, 2000 at 18:08:02:

This has been a long battle. My car has been losing water real slow for the last two monthes. So far I have: Replaced temp sensors (blue one), and drained and flushed system putting all new fluids in and I replaced the res. cap. Then yesterday my coolant warning light came on so I pulled into a gas station and it was a little bit low. Till today there has not been evidence of water leakage under the car except for a few drips from overflow tube. Then today I looked under the car and there was a 10 to 12 inch puddle, also there was some antifreeze on alt. brackets. Until I saw this I was thinking that my head gasket was starting to go but mabye not. Any insight? TIA Phillip

Do you know when the water pump was last replaced?

If it is over 10 years old, then change it out anyway. It would be cheap insurance to preventing some really expensive repairs to your engine.

Now about the coolant leak. Have you replace the cap recently. Many people flush and change the coolant, but never change the cap. They wear out and rust out too. It might not be holding enough pressure allowing the coolant to escape. My car had that problem, plus the vent tubing from the radiator had dried up and cracked. I took off the fixed metal band clamp and replaced with a high quality German screw clamp. I was lucky because I thought the radiator was bad. Also, do you have an steaming on the windsheild inside the car or moisure on the driver's side floor or carpeting??

The heater core inlet/outlet tube flanges might be seeping coolant. Just tighten the nuts, and clamps up.

Finally, if you still can not find the leak get a cooling system pressure test done.

N.B. one way to test a water pump is to grab the pulley and move it in all axises. If there is play, the bearing are bad. If you see leaks or moisture in the weep hole or seepage around the shaft it is bad.

Good luck.

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