DIY: Diagnosing a Faulty Water Pump (Tutorial Video) - Mercedes-Benz Forum

 
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post #1 of 4 (permalink) Old 09-01-2013, 09:16 PM Thread Starter
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DIY: Diagnosing a Faulty Water Pump (Tutorial Video)

Tutorial video on how to diagnose a faulty water pump in your vehicle. This video consists of two different areas which include gaskets or the bearing. Now this does vary between make and models of vehicle of what type of water pump your vehicle is equipped with. Some do have mechanical clutch fans like what is shown in the video, others don't. Some water pumps can be driven by an accessories belts, other by a timing belt, they can also be hidden under a timing belt cover if your vehicle has is a timing belt engine. Any faults with the water pump could be just routine maintenance or causes by another issue under the hood which in turn causes premature failure of the pump.

Symptoms of water pump failure:
-leaking gasket between the water pump housing and engine block
-worn seal around the shaft bearing which causes the coolant to leak out the bearing vent hole
-worn out bearing which would make a howling or grinding noise
-excessive "play" in the water pump shaft

Causes:
-regular usage which causes wear over time (routine maintenance)
-broken mechanical fan which causes the water pump shaft to be off balance
-worn mechanical clutch fan assembly which causes the water pump shaft to be off balance
-leaking water pump shaft seal which washes out the lubricant within the bearings
-worn/dried out gaskets/seals that cause a coolant leak

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post #2 of 4 (permalink) Old 09-05-2013, 03:38 PM
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I didn't realize diagnosing the water pump was so complex and challenging an affair that it required a two-part video. How did I manage all these years?

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post #3 of 4 (permalink) Old 09-05-2013, 03:51 PM
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Quote:
Originally Posted by flyboyike View Post
I didn't realize diagnosing the water pump was so complex and challenging an affair that it required a two-part video. How did I manage all these years?
True.

When they flop around, rattle and/or leak water from the weep hole, I usually take the hint.

As they say, though, YMMV.

And of course if one isn't used to looking around under the hood...they don't have a method yet.

Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy; its inherent virtue is the equal sharing of misery. (Winston Churchill)

Last edited by Check Codes; 09-09-2013 at 11:21 PM.
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post #4 of 4 (permalink) Old 09-07-2013, 05:53 AM
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If one isn't used to looking around under the hood, he probably shouldn't start with the water pump.

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