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    Water pump???

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    6 replies
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    • Member since
      December, 2005
    Water pump???
    Posted by j-2-800 on Saturday, February 03, 2007 6:20 PM
    how hard is it to change 2001 XC800
    • Member since
      July, 2005
    • From: Western WI
    Posted by orville-x on Saturday, February 03, 2007 7:14 PM
    With the big block twins, you don't "change" the water pump, but service it.  The pump is quite simple: an impeller on a shaft supported by a couple bearings, a seal to isolate the shaft/bearings from the coolant and a pulley for the drive belt.  All the internals are replaceable individually, so you basically fix what is worn or damaged and put it back together.  The only real trick is that the seal is best installed with a "special tool".
    • Member since
      December, 2005
    Posted by j-2-800 on Tuesday, February 06, 2007 9:03 AM
    Can this be done in the sled? Just remove the cover and there everything is?
    • Member since
      July, 2005
    • From: Western WI
    Posted by orville-x on Tuesday, February 06, 2007 10:19 AM
    Depending on the sled, it can be serviced without pulling any more than the recoil and the water pump cover.  Removing the cover from the water pump (where the cooling hoses attach) will expose the impeller and the nut that holds it on the shaft.  When removing it, there is one washer under the nut and an odd-shaped washer that fits into the back of the impeller.  Watch for those parts when taking things apart.  With the impeller off, you'll see the seal.  The pump shaft comes out the recoil side of the pump housing.  The shaft needs to be pressed out (or driven out CAREFULLY).  The shaft will come out with (usually) both of the bearings.  If the inner bearing doesn't come out, it needs to be pressed out too (same direction as the pump shaft came out).  With the shaft and bearings out, the seal can be knocked out (opposite direction).  Check both the bearings on the pump shaft (replace or clean and repack as needed), check the impeller for damage or unusual wear, etc.  To reassemble, install the pump shaft w/bearings, then the seal.  The seal gets driven over the installed shaft with the "special tool", which seats the outer rim of the seal in the housing and sets the correct orientation of the inner portion of the seal relative to the pump shaft.  Be aware that if the housing is a little "loose", the pump shaft might want to slide out while installing the seal.  Make sure things stay in place when driving the seal in.
    • Member since
      December, 2005
    Posted by j-2-800 on Thursday, February 08, 2007 9:22 AM

     orville-x,

    Took it apart last night and found that the water pump was good. Problem was that a bolt head broke off. One of the bolts that holds the recoil housing broke and the head was flying around inside there. It took out my water pump belt and beat the *** out of my flywheel.

    I am having problems running over 7300 rpms, would this be becuse the chuncks of magnet missing from the flywheel?

    Also does the pick up that gets trigger from the magnet on the flywheel have a little piece of metal at the surface, like a staple?

     

    Thanks for all your help,

    Jason

    • Member since
      July, 2005
    • From: Western WI
    Posted by orville-x on Thursday, February 08, 2007 12:13 PM

    If the flywheel magnets were damaged, that effects how much power the ignition and lighting coils are able to generate.  I can't guarantee that is your problem, but it doesn't help the situation.  As far as the ignition "pickup" goes, there is a small metal piece that sticks out of the plastic housing, so you're seeing what you should see.  If the motor doesn't like to pull RPM correctly, check the rest of the stator for damage too.  RPM loss is one possible symptom of a bad stator (may be flywheel related in your case).

    • Member since
      February, 2019
    Posted by Armand on Thursday, February 07, 2019 8:36 PM
    How do you change the pulley

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