Checking water pump

DISVNVET

MEMBER
1994 MAZDA MX3
1.8L
6 CYL
2WD
MANUAL
150,000 MILES

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.

Friday, April 26th, 2019 AT 5:29 PM

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,885 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