Water Pump Bolt-Diesel M51
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Thread: Water Pump Bolt-Diesel M51

  1. #1
    JUNIOR ROVER
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    March 28th, 2010
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    COLOMBO, SRI LANKA
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    840

    Water Pump Bolt-Diesel M51

    Hi all,

    Yesterday, removed the AC compressor to remove one of the clutch shims. While there, saw that one of the water pump bolts have come loose and it's threaded part can be seen. There were 2-3 drops of coolant but no over heating or loss of coolant.
    Since the pump is attached with 4 bolts and one is loose or cracked front cover, can I run the car ignoring this?
    See the picture.
    Attached Thumbnails Attached Thumbnails Water Pump Bolt-Diesel M51-rr-water-pump-bolt.jpg  
    P38 - 1997 2.5 DSE
    CLASSIC - 1982 ,2.4 VM DIESEL(In complete Project-sold)
    TOYOTA CORSA -1998, 1.5 TURBO DIESEL (sold)

    Haven't heard of Murphy's Law, go buy a RANGE ROVER.!

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  3. #2
    SOPHOMORE ROVER xrav22's Avatar
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    Re: Water Pump Bolt-Diesel M51

    Here is a blown up look , mabey just use a open end wrench to snug it back.
    Water Pump Bolt-Diesel M51-annotation-2019-04-22-190145.jpg
    1997 Range Rover 4.6 HSE
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  4. #3
    JUNIOR ROVER
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    Re: Water Pump Bolt-Diesel M51

    Part of the bolt is visible & bolt hole (front cover) has opened.
    Just tightening won't help. It is a Cylinder head out job to replace the front cover which I want to avoid if possible.
    P38 - 1997 2.5 DSE
    CLASSIC - 1982 ,2.4 VM DIESEL(In complete Project-sold)
    TOYOTA CORSA -1998, 1.5 TURBO DIESEL (sold)

    Haven't heard of Murphy's Law, go buy a RANGE ROVER.!

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  6. #4
    JUNIOR ROVER
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    October 17th, 2017
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    East England
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    Re: Water Pump Bolt-Diesel M51

    If it hasn't been leaking I'd say to leave it but keep a close eye on it. You don't know how long it's been like that anyway, it could have been like it for ages. From the close up picture it looks like there might be another bolt missing, between the one with the exposed thread and the one you can see at the bottom.
    96 4.6HSE
    98 4.0 Police spec
    and a number of others I maintain for the owners.

  7. #5
    FRESHMAN ROVER kretslopp's Avatar
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    January 17th, 2017
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    You mention the front cover.
    Isn’t the water pump “housing” actually a part of the engine block?
    1999 P38 2.5DSE

  8. #6
    Premium Member DaGlitch's Avatar
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    February 11th, 2013
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    Re: Water Pump Bolt-Diesel M51

    I 2nd xrav22. Just get a wrench in there and snug it up. Better to take care of it now since you're in there rather than later when you start leaking or lose the bolt.

  9. #7
    JUNIOR ROVER
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    Re: Water Pump Bolt-Diesel M51

    Quote Originally Posted by Richard_G View Post
    If it hasn't been leaking I'd say to leave it but keep a close eye on it. You don't know how long it's been like that anyway, it could have been like it for ages. From the close up picture it looks like there might be another bolt missing, between the one with the exposed thread and the one you can see at the bottom.
    Changed the water pump in mid February this year. That particular bolt was problematic and used some thread locker to get it seated. Now it appears to have loosened with a bolt hole part missing. Frequently I glance at the temp gauge to see any issues in advance. So far so good.

    In diesel, water pump fixes onto the front cover-aluminium which again fit onto the engine block. To get the front cover, the head , sump & crank pulley need to come out.
    The bolt hole you see in the middle is not for a fixing bolt (10 mm) , it is to assist removal by inserting a 12 mm bolt there.
    Can I use something like JB Weld or Aeraldite , to fix it without removing?
    P38 - 1997 2.5 DSE
    CLASSIC - 1982 ,2.4 VM DIESEL(In complete Project-sold)
    TOYOTA CORSA -1998, 1.5 TURBO DIESEL (sold)

    Haven't heard of Murphy's Law, go buy a RANGE ROVER.!

  10. #8
    JUNIOR ROVER
    Join Date
    March 28th, 2010
    Location
    COLOMBO, SRI LANKA
    Posts
    840

    Re: Water Pump Bolt-Diesel M51

    Re-tighten the bolt & good use of JB weld fixed it.
    No leaks, all back to normal. Will get a timing cover & change mine when time permits, though it 's not necessary.
    P38 - 1997 2.5 DSE
    CLASSIC - 1982 ,2.4 VM DIESEL(In complete Project-sold)
    TOYOTA CORSA -1998, 1.5 TURBO DIESEL (sold)

    Haven't heard of Murphy's Law, go buy a RANGE ROVER.!

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