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Coolent issues. place your bets.

Discussion in 'Land Rover Discovery' started by Disco Moneypit, Jun 24, 2009.

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  1. Disco Moneypit

    Disco Moneypit New Member

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    Vehicle has suddenly started to develop some strange coolent issues which I have yet to investigate.

    All will be fine and dandy, then after quite a length of time on the motorway it will suddenly run very hot, (but not into the red). Turning the fans on full blast and full heat soon brings things back down to notmal operating temp.

    All I have had time to do so far is check the coolent fluid level, (ok, no loss), and change the air filter as the old one was shagged after the last Pay & Play a few weeks ago.


    So, whats it going to be then?

    Thermostat?

    Water pump?

    Faulty temp sender unit?

    Blocked up rad?

    Or something else?
     
  2. [JP]

    [JP] New Member

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    well, if you were in a pay&play not long ago my bet goes on blocked radiator, mud between fins.. or have you wash that?
     
  3. Disco Moneypit

    Disco Moneypit New Member

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    I've blasted out as much as I could with the jet wash with the rad in place and the grille loosened, not fully removed.

    I'm inclined to agree with you. Either that or a sticking thermostat.
     
  4. Matt TDi

    Matt TDi New Member

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    I'd go for sticking 'stat.
     
  5. battenberg

    battenberg Well-Known Member

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    take out the stat and put it in a pan of water... bring slowly to the boil, you should see it open.. 87deg I think.
     
  6. [JP]

    [JP] New Member

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    DiscoM...
    In the evening, when it's dark, put a torch in the engine bay and then look through the front and check if you can see the light behind...

    I got stuck in a mud pit and my rad was covered in mud, I washed it and all the mud came out (I thought!) as it was looking clean, but between the fins it was caked in mud and therefore still overheating..

    of course you can't pressure wash the rad or all the fins will just collapse, but what I've done was use a pen, on the end of the pressure gun, to get a precise, thin, powerfull, water jet.

    This worked perfectly, the jet would push the mud between the fins all the way back.. took some time, but worked.

    [​IMG]
     
  7. Disco Moneypit

    Disco Moneypit New Member

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    Top tip!

    nice one.
     
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