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P38A Chewed Fan belt

Discussion in 'Range Rover' started by EntropyUK, Nov 10, 2018 at 8:55 PM.

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  1. EntropyUK

    EntropyUK Active Member

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    Just had a nightmare drive home in my diesel. Found the fan belt had been chewed. Temp fix to get home failed and twice and it went into the red for up to 30 secs as I couldn't stop due to road conditions. Once stopped I manually turned the fan to move the coolant to try and stop any hot spots.

    Firstly what should I check to see what caused the belt to fail? It was only 8 months old so surprised it failed.

    Secondly have I cooked my head and caused it to warp?

    Cheers in advance.
     
  2. tarphenry

    tarphenry Well-Known Member

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    Power steering bracket or idler bracket broke
     
    Grrrrrr likes this.
  3. brianp38dse

    brianp38dse Well-Known Member

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  4. tanis8472

    tanis8472 Active Member

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    I had similar but was the idler on the tensioner. Somebody had managed to fit a narrower one which sliced the belt along one edge over time.
    Iirc the new one was 25mm wide and old one 18mm which is narrower than the belt.
     
  5. Datatek

    Datatek Well-Known Member

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    Head should be OK, mine survived a water pump failure which led to an instant overheat.
     
  6. EntropyUK

    EntropyUK Active Member

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    looks like the problem was with the mounting between the ram and the tensioner bracket. looks like the threaded side had cracked. Tried to put belt on to see what happened, levered the ram up as per Rave and it broke away. A look at the parts shows the bracket had been cracked for some time.

    How do I get the bracket off as it looks like it needs a huge allen key.
     
  7. Datatek

    Datatek Well-Known Member

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    A bolt head of the correct size.
     
  8. EntropyUK

    EntropyUK Active Member

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    cheers Datatek
     
  9. kds

    kds Well-Known Member

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    10 mm bolt, 17mm head size ( I think). I welded a bolt to a bit of bar to do mine. (oooh look 1000 posts)
     
  10. Grrrrrr

    Grrrrrr Well-Known Member

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  11. wammers

    wammers STILL BREATHING. Donater

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    It's only a common failure if an hamfisted method is or has been used to relieve the belt tension.
     
  12. Joss155

    Joss155 Well-Known Member

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    If you have a set of sump plug drain keys, these can be used to undo the large end cap. Had the same issue at the start of last month. Bought a non gen part for about £40.
     
  13. wammers

    wammers STILL BREATHING. Donater

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    Have had a couple of instances were the 17 mm Allen cap was so tight it undid the shaft from the front cover. Just disconnect ram and remove the lot. Allen cap is much easier to undo with large nut trapped in a vice. The early tensioner arm STC2129 was superseded by STC4608 at some stage.
     
    Last edited: Nov 12, 2018 at 3:21 PM
  14. EntropyUK

    EntropyUK Active Member

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    Yes the end cap is looking v tight almost rounded a nut on the bolt trying to get it off. It is a standard thread I assume I.e leftie loosie.
     
  15. wammers

    wammers STILL BREATHING. Donater

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    Yep standard R/H thread can be very tight. Try giving the cap a gentle tap with tension on it.
     
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