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Old 30-10-2013, 12:49   #1
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Universal Diesel & Oil Leak Question

Hi...I am having trouble with an oil leak with my Universal M-25XPB.

I developed an oil leak and traced it to where it looks as if it is originating from where the water pump">Raw water pump attaches to the engine. I replaced the raw water pump using the gasket that came with it. When I started the engine the leak is still there (a consistent small steady run).

My question is, is there a seal where the water pump goes into the engine that needs to be replaced, or am I supposed to use some gasket sealer on the water pump gasket?

If there is a seal, is it easy enough to accomplish or is a mechanic needed?

Thanks for any thoughts and assistance
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Old 30-10-2013, 12:58   #2
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Re: Universal Diesel & Oil Leak Question

Yes, you need to replace the seals.

Oberdorfer Pump Rebuild 101 - Mysteries of the Oberdorfer - Seal Replacement - REBUILDING A PUMP w/Flix [Link added to main page of C34 Tech wiki]

Click on the tech wiki at the top of the page, too, and find tons more info on your engine.
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Old 30-10-2013, 13:05   #3
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Re: Universal Diesel & Oil Leak Question

Stu, thanks for your reply. Are you refering to seals in the pump? I am asking if there is a seal in the engine that needs replacing. I bought a brand new pump.
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Old 30-10-2013, 13:27   #4
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Re: Universal Diesel & Oil Leak Question

Hi, Most engines have a paper gasket that is fitted at the engine between engine and pump, remove the water pump, clean both the engine and pump mounting face's absolutely spotless with a little acetone(or similar), check for any burrs and file them off. I use Hylomar but any proprietary jointing compound will do the job. Coat both surfaces lightly and evenly and gently press the paper gasket to the engine face. place the pump in place taking care the mating surfaces are straight and bolt up evenly all round. Now go and take a long coffee break whilst the jointing compound does it's job. Start the engine after an hour and check for any leaks, shut the engine down and have a final check all bolt/nut tensions are even.
Good Luck.
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Old 31-10-2013, 10:26   #5
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Re: Universal Diesel & Oil Leak Question

Quote:
Originally Posted by carlhanton View Post
Stu, thanks for your reply. Are you refering to seals in the pump? I am asking if there is a seal in the engine that needs replacing. I bought a brand new pump.
Carl, no. Have you read the link? It has PICTURES of everything involved.
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Old 31-10-2013, 11:24   #6
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Re: Universal Diesel & Oil Leak Question

The two seals, oil & water, are inside the pump.
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