How To Test A Water Pump

There are many reasons for an engine to overheat, including faulty thermostat, blocked radiator, loose fan belt, blown head gasket or a myriad of other reasons.
Have you checked your water pump - not just for a noisy bearing or the mechanical seal leaking, but also testing the impeller integrity? How do we do that without x-ray vision?
Here is a simple test to prove that the water pump is working correctly and circulating the coolant efficiently.
Disclaimer:
MiracleMAX wants you to be safe, however, no guarantee can be given against improper use or unauthorised modifications on the information provided. The repair shown in this video is carried out at your own risk and any property damage or injury is your own responsibility. Please ensure you carry out this repair safely using approved safe work practices, correct use of recommended tools and equipment. This video is educational only and is no guarantee of a result if done incorrectly. Any injury, damage or loss due to incorrect use of tools, information or equipment is the sole responsibility of the person carrying out the repair and not MiracleMAX.
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[@andrewhelmer7710]

This has to be one of the best guides on water pumps on youTube.

[@MiracleMAX]

Thanks for your kind comment Andrew 😁👍😊

[@GerardBurkeBurkesGarage]

Nice one mate, well done, a brilliant demo. Another great test to have in your arsenal 💪👍

[@MiracleMAX]

Can't really take the credit. One of the other TaT guys wrote an article on how to do it ages ago, but I thought it would be good to see it in a video. It's a great test and easy to do.

[@robsim4692]

Good day mate, ive hot a 2015 jeep compass that had a problem that started with radiator and progressed from there leading me to the water pump which led me to a discovery of a fix called gasoline, a match, and 1 simple promise made that if I ever meet a jeep engineer im gonna engineer a ass kicking of a lifetime

[@MiracleMAX]

I believe the correct acronym for Jeep is Just Empty Every Pocket!

[@gaven2284]

Thank you sir

[@MiracleMAX]

You are welcome 😉

[@ll_distribution]

Amazing thanks

[@MiracleMAX]

Most welcome 😊

[@alrifainidal]

thanks Mate

[@MiracleMAX]

You're welcome!

[@MsMshiyam]

great great so nice

[@MiracleMAX]

Thank you 😊

[@ltkaffey]

Hi MM, never tested it that way good idea. You want to be sure its the pump, especially with timing belt driven pumps its a rabbit hole you dont want to venture unless you are 100% . cheers

[@MiracleMAX]

Hey ltkaffey,
You are right, manufacturers love to hide the water pumps behind belts and heaps of other components.
I can't take all the credit, I saw it in one of our TaT magazines, but thought it would be good to show it practically in a video.
Thanks for your comments. 😉

[@warrenpeas]

what did you use to connect the pressure gauge?

[@MiracleMAX]

Just some spare heater hose I had

[@philippefrossard4012]

Any reference for the pressure gauge?

[@MiracleMAX]

I just used a pressure gauge that we had spare. Anything that will fit and read for convenience will suit.

[@dfsilversurfer]

Wow that engine a bit worn .... but water pump good. Haha

[@MiracleMAX]

At least it's a good test subject for the apprentices. It still starts and runs. What more could you want? 😁

[@andju2hikari]

bare hand ?!

[@MiracleMAX]

Sorry, what do you mean by bare hand???

[@andju2hikari]

i would not touch radiator fluid without gloves

[@MiracleMAX]

@@andju2hikari Thanks for your comment