Talbot based Hymer water pump

Discussion in 'Tech/Mech General' started by andi4x4, Apr 4, 2011.

  1. andi4x4

    andi4x4 Read Only Funster

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    Hi All,

    Having finally got my 1988 Talbot/Hymer m/h started (you may remember the problems I was having last year) I noticed she has sprung a water leak. Actually, I spotted it before I started her, as, knowing that there was already an existing water leak, I topped it up before cranking it :)

    Anyhow, Whilst filling the coolant up, I found a small "fountain" of water, about 3mm in diameter comming out from under the water pump. It seems over the winter sometime, whilst sitting with about half coolant level, she has blown a plug out of the water pump housing, I think, or is it likely to be comming from the engine block ? ( I hope not ! ) I have already stripped the pump down ready for removal, although I havent taken it off yet. All hoses are off, all belts off appart from two that run from the pump to a large pully (which I think may be the Power steering pump, as I cannot see how to get them off without without removing the the large pully.) Now, I also need to remove the pully from the water pump, I think, as I cannot get to the water pump retaining bolts without doing so. I have the outer pully removed, but, am struggling to get the main pully off - anyone have any thoughts ? I need all the help I can get with this one !
     
  2. thehutchies

    thehutchies Funster

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    It's very common for the water pipe connecting to the pump to fail. See here for information:

    steel water pipe

    Be sure to check that! :thumb:
     
  3. andi4x4

    andi4x4 Read Only Funster

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    Hi Guys,

    Thanks for the heads up - mine is a 2.5 Turbo Diesel, not a petrol one, though ! That pipe does not sit where the leak is either. Water pump on the 2.5TD is on the end of the camshaft above the gearbox, the leak is coming from somewhere underneath the water pump - very precise leak - as if someone has removed a screw to let the water out ! I havent found the source yet, but all the belts and hoses have been removed ready for me to take the pump off - just need to get some gasket sealer so that I can replace it if not the problem.

    Are there any small core plugs in the water pump casting, or the alloy casting it bolts onto, or the engine block in that area that are likely to have blown out ? If so, are they an easy fix ?

    Andi
     
  4. thehutchies

    thehutchies Funster

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    If you haven't already, you could try asking on Preloved here: Preloved Talbot Express thread

    Lots of very knowledgeable people on there regarding these vans.
    Unfortunately this thread on Preloved is nearly 250 pages long now!

    (Oh and the Talbot Owners Club: TOC
     
    Last edited: Apr 4, 2011
  5. andi4x4

    andi4x4 Read Only Funster

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    Lol ! Just had a quick look at these :Eek!:- I think browsing those is a task for this evening - time ( and weather ! ) better spent working on the MH this afternoon !

    Thanks for the advice and the links !

    Andi.
     
  6. andi4x4

    andi4x4 Read Only Funster

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    Update on the water leak -

    Having removed the water pump and inspected it, I could find no fault with it. So, I then removed the alloy casting that the pump bolts to from the cylinder head, and lo and behold, there is a huge crack in the bottom of it, not visible whilst in situ. So, I have come the the obvious conclusion, that, this is the problem. Next, I need to get a new one, or good s/h one, to replace it.

    Does anyone know of a good surce of possibly obsolete Talbot parts ?
     
  7. pappajohn

    pappajohn Funster Life Member

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    sorry cant help with a supplier though there is someone who specialises in talbots and im sure a funster will point you in the right direction.

    as a last resort, as the pump still fits the casting, have it ally welded.
     
  8. andi4x4

    andi4x4 Read Only Funster

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    Hi Pappjohn,

    Welding had crossed my mind, however, I am not sure if there is anyone on the Isle of Man who can do cast ally welding. I will have to ask around my motorbike racing contacts - they will know !
     
  9. pappajohn

    pappajohn Funster Life Member

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  10. andi4x4

    andi4x4 Read Only Funster

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    Ahh ! Seen them before on a couple of forums - will give them a ring tomorrow ! In the meantime, I have spoken to a bike racer friend who seems to thing there are a couple of people on the Isle of Man who can weld cast aluminium, one of whom is in the yard next to my motorhome ! D'oh !
     
  11. pappajohn

    pappajohn Funster Life Member

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    the options always there then :thumb:

    any good engineering/fabricating workshop should be able to do ally welding and may even be cheaper than a used one and postage to the IOM wont come cheap either.
     
  12. andi4x4

    andi4x4 Read Only Funster

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    Spoke to a sidecar racer friend today about welding cast aluminium - hes said,'bring it down I'll do it for you !'

    Half an hour later, part welded, tenner paid, and long chat about the first Yamaha powered sidecar outfit to win a world championship - which just happened to be sitting in his workshop, leaving his bank account 17.5k lighter !

    Rare find as it's the only one in existance ! Looking forward to seeing it lap the TT Mountain Course at the end of May, and getting the M/H back on the road even sooner !
     
  13. rangitira

    rangitira Funster

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    Delphin Designs on 01258 857474 (thats the W/Shop) have a yarn with Derak, he sells both new and second hand bits. you need Paypal or cheque, he doesn't take cards
    I've dealt with him before and have found him very reliable and full of knowledge about Talbots.
     
  14. andi4x4

    andi4x4 Read Only Funster

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    now a cylinder head problem !

    Hi all,

    A quick update on the water pump issue - having had the cracked manifold welded and sealed, I refitted it today, along with the pump and all hoses, etc. Started filling it with water, all was well, pump and manifold had sealed, and weld seems to have fixed the manifold crack, then, low and behold, another leak showed itself - from between the middle two injectors on the cylinder head ! On inspection, there is a 2 inch long horizonal crack in the head, between injectors two and three. It obviously froze during the winter and popped, so,

    What are the chances of other damage to the head ?

    Assuming this crack is the only damage, would I get away with having it welded like I did with the pump manifold ?

    Could I get away with "Chemical metal" type putty, or would this be likely to fail rapidly ?

    I am thinking, I probably need to take the head off, inspect and then make a decision on whether to risk welding, or replace, according to any other damage found.

    You thoughts please !
     
  15. wivvy's dad

    wivvy's dad Read Only Funster

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    The only sensible way forward.

    Can-o-worms springs to mind.

    Good luck with it all.....
     
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