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Old 11-11-2012, 10:00 AM   #1
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Join Date: Dec 2010
Location: Windsor Colorado
Posts: 194

During my annual inspection and service I choose to replace the lower water pump belt on my Cat 3126. I carefully loosened the bolts to the tensioner and slipped the old belt off on installed the new belt. In a some what ackward position I was able to put the right amount of tension on the new belt using a small breaker bar in the designed spot and a 3/8 inch racket.... I installed a new serpentine belt and sat back to look at the job. Using the 3/8 inch rachet I checked the bolt security. The lower bolt on the adjuster was fine , When I checked the torgue on the upper bolt I heard a small TINK...the upper bolt spun ...The bolt casting had cracked ! half of the bolt casting came off when I removered the tensioner...Does any one have any advise on changing the water pump ?...Any ideas on what this might cost ?


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Old 11-11-2012, 10:25 AM   #2
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Join Date: Jul 2010
Posts: 92
Don't know anything about your particular situation but I had the same type of thing happen on my Dodge thermostat housing. It broke half the bolt hole worth of casting. I still had half the flat mounting surface, and the threads went pretty deep into the casting. I got away with a longer bolt that could reach into the good threads.

Still running like that today... Just a thought.....

Retired USN Master Chief
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Old 11-11-2012, 10:35 AM   #3
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Sorry for your troubles. I don't have a suggestion but welcome to the forum.

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