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Old 12-25-2015, 11:23 AM   #1
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ISL 400 Water pump

On my trip south I noticed my engine temps rising above normal I pulled over and found the radiator low on antifreeze. I ended up pulling over several times to add water. After getting to my destination I found the water pump leaking from the weep hole.

Replacing the pump looks relatively easy. Has anyone else had an ISL pump go bad. I am at 68,000 miles.
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Old 12-25-2015, 01:13 PM   #2
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Nope, but hope you added only distilled water--if you replace the pump, probably need to flush system and fill with new coolant anyway......
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Old 12-25-2015, 02:32 PM   #3
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AND, the proper coolant.

Either "low silicate for diesel with added SCA (Supplemental Coolant Additive) or one of the new-generation OAT-based coolants.

The two are NOT compatible, so be sure to flush (including dash heater core) and go back with an acceptable one.

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Old 12-25-2015, 04:03 PM   #4
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That's the plan replace the pump and flush system and fill with new Oat coolant.
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Old 12-26-2015, 10:20 AM   #5
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It sounds like you might be doing this yourself, if so please keep us posted on how it goes. I'm just curious and I figure if I know how to do it I'll never have to.

FWIW, I changed my alternator and it was a piece of cake. Some of the things back there look a lot harder than they are.

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Old 12-26-2015, 12:21 PM   #6
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Here is a step by step for changing coolant:

http://forum.dieselrvclub.org/index....ic,6653.0.html

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Old 12-26-2015, 07:37 PM   #7
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Thanks. I've done it before.
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