Question about 1991 Cadillac DeVille

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Water pump replaced 3X, broke off again, why?

I have already had two different mechanics to try and fix my water pump. It has now broke again and usually goes about 2 weeks before breaking.

Is there something that will cause the water pump to continue to break again and again that they aren' t fixing?

Wrong size belt for example?

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  • sheila_dobbs May 13, 2009

    The water pump was leaking but that was finally fixed. Drove it for a couple of weeks and it broke everytime. It had to be rethreaded last time. I think your pulley idea makes a lot of sense. Thanks

  • sheila_dobbs May 13, 2009

    The water pump was leaking but that was finally fixed. Drove it for a couple of weeks and it broke everytime. It had to be rethreaded last time. I think your pulley idea makes a lot of sense. Thanks for

  • sheila_dobbs May 13, 2009

    The water pump was leaking but that was finally fixed. Drove it for a couple of weeks and it broke everytime. It had to be rethreaded last time. I think your pulley idea makes a lot of sense. Thanks for your t

  • sheila_dobbs May 14, 2009

    Unfortunately, I don't think that is it. That was what the first mechanic had said after it broke the first time. I bought motor mounts took them to a new mechanic and he said my motor mounts were fine. Which I believe, because I can't imagine why he wouldn't have taken my money to do the job. Besides my engine doesn't move or lift up when I give it gas.

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This may be a long shot -- I've had two Caddys, and '84 and a '93. BOTH of them kept breaking motor mounts.

Now, since your problem is sorta wierd -- could a broken motor mount create enough mechanical jostling as to ruin a water pump??

Who knows, but I do know that I had to have transmission seals replaced as a byproduct of bad motor mounts.

When those big mills start bouncing around in strange directions even a little, all sorts of odd-ball things begin to happen..

good luck

Posted on May 13, 2009

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A wrong size belt will generally just break the belt or throw it off the pulleys,and I can't imagine a mechanic would pu the wong one on twice,there's a good chance the problem is a pulley is out of alignment,most mechanics don't think to check if the other units pulley's shaft bearings are loose or if all the pulleys are correctly aligned,I can't be 100% positive on this as you describe the problem as a broken water pump,so it doesn't tell me if it's leaking water or whatever the case may be,but it would be worthwhile to have this checked out when it goes back to the shop.I hope this helps.

Posted on May 13, 2009

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Had same problem fixed by geting pump from dealership with new bolts

Posted on Nov 13, 2011

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