Water pump tensioner catastrophic failure?
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Northstar Engines and System Technical Discussion Discussion, Water pump tensioner catastrophic failure? in Cadillac Engine Technical Discussion; Couple of months ago I noticed some squeeking on the Water pump side of the engine, like a bad bearing. ...
  1. #1
    JSMeloche is offline Cadillac Owners Fanatic
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    Water pump tensioner catastrophic failure?

    Couple of months ago I noticed some squeeking on the Water pump side of the engine, like a bad bearing. I had my mechanic look at it, he said it could be the water pump, but there is no reason to replace it if its not leaking.

    So yesterday, I drive to work, nice open road, so I decide to have a bit of fun. I pull up in the parking lot and "Engine overheating, idle engine" messages comes up... Open up the hood. I hear the pressure tank bubbling.... I say to myself:thats it... I blew up the darn head gasket, my old Caddy is dead.

    Then I look at the water pump, the belt is off, the tensionner pully is broken off and the bearing is nowhere to be found!!!! The bearing exploded!

    So, I replaced the pulley, and belt at the same time. No biggy.

    Moral of the story, be careful about the water pump pulley bearing. If they squeek, look at them! I searched the forum and it seems im not the first one with an exploded bearing.

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    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: Water pump tensioner catastrophic failure?

    Yeah, I guess in hind sight when the bearing is squeaking it's actually crying out for help.

  4. #3
    JSMeloche is offline Cadillac Owners Fanatic
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    Re: Water pump tensioner catastrophic failure?

    Quote Originally Posted by Ranger View Post
    Yeah, I guess in hind sight when the bearing is squeaking it's actually crying out for help.
    Ive seen them seize, woble, crack. But rarely seen an exploded bearing!

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    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
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    Re: Water pump tensioner catastrophic failure?

    We had one in here, two months ago, where the tensioner seized, the belt heated up and melted the cam driver pulley. Anything is possible with a tensioner/idler system. It's a great idea, but that tensioner/idler spins at some ferocious speed, just like alternators and water pumps, with only the grease that went in there in The Dark Ages (?). It's a wonder any of them last even 25,000 miles..........

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    JSMeloche is offline Cadillac Owners Fanatic
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    Re: Water pump tensioner catastrophic failure?

    Quote Originally Posted by submariner409 View Post
    We had one in here, two months ago, where the tensioner seized, the belt heated up and melted the cam driver pulley. Anything is possible with a tensioner/idler system. It's a great idea, but that tensioner/idler spins at some ferocious speed, just like alternators and water pumps, with only the grease that went in there in The Dark Ages (?). It's a wonder any of them last even 25,000 miles..........
    Im pretty sure mine was original! 150,000 miles on it.

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