Checking water pump

1994 MAZDA MX3
150,000 MILES • 1.8L • 6 CYL • 2WD • MANUAL
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DISVNVET
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  • 6 POSTS
After the car runs awhile (does not heat up) sometimes the coolant overflow (overfills). Is there a good way to check if water pump is working correctly.
Apr 26, 2019 at 10:29 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
Welcome to 2CarPros.

If the engine isn't overheating and the coolant is coming out, we need top check for a bad head gasket. It sounds like compressed air from the combustion chamber is getting into the cooling system and causing this.

Take a look through this link and let me know the results.

https://www.2carpros.com/articles/head-gasket-blown-test

As far as the water pump working, if the engine doesn't overheat, it is working.

Let me know the results of the head gasket test.

Take care,
Joe
Apr 26, 2019 at 1:28 PM
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