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Slow water loss Rocky diesel

Discussion in 'Rocky' started by cringedweller, Nov 29, 2016.

  1. cringedweller

    cringedweller New Member

    Hi all,

    My Rocky diesel has developed a slow water leak of about 250ml every 2-3 days and I can't find out where it is leaking from. I've checked and nipped up all the hoses I can reach (without stripping anything out). There is no evidence of air bubbles in the water. Any ideas? Wang?

    Cheers
     
  2. Spooner

    Spooner Well-Known Member

    Cyl Head ?
     
    Good ole boy likes this.
  3. ian.c

    ian.c Well-Known Member

    Check that your radiator cap is ok, if it's shoddy the coolant will not return from your overflow as the engine cools. The return valve is spring loaded in the centre of the cap seal and should pull out easily to check operation.
     
  4. cringedweller

    cringedweller New Member

    I was hoping that no bubbles meant cylinder head was ok, but I guess that is more for head gasket? I replaced the radiator cap and water pump had a leak so i replaced that too
     
  5. typhoeus

    typhoeus Well-Known Member

    heater hoses?, any bypass hoses?
     
  6. muc the truck

    muc the truck Well-Known Member

    Go to a radiator shop , say I think I need a new radiator . They will normally do a pressure leak down test for you if you ask nicely for free or just a small fee.
    You normally find out were its going with this test.
     
    Good ole boy likes this.
  7. Good ole boy

    Good ole boy Active Member

    Take of your hose to overflow tank and put another hose on it into a 600mm bottle of water half full make sure that the hose is under the level of the water start it up from cold run it for ten minutes and look for bubbles coming out of the tube or strap it where you can see it and drive up a hill or as Muc the truck said radiator shop and pressure or head check it
     
  8. Good ole boy

    Good ole boy Active Member

    Buggered thermostat will do it to
     
  9. cringedweller

    cringedweller New Member

    Thanks for the replies everyone, you guys are great. Good ole boy what would it mean if there was bubbles in the water when i do the bottle test? It sounds bad if there was..sounds like a pressure test would be the way to go anyways
     
  10. Good ole boy

    Good ole boy Active Member

    Bubbles can be leakage out of head gasket or head cracked or a hotspot in head also can be caused by buggered thermostat causeing a hot spot I believe better than a pressure test as real time under pressure uphill tells a good story hope it turns out okay
     
    Last edited: Dec 12, 2016
  11. cringedweller

    cringedweller New Member

    Yesterday under load going up a big hill she got very hot and then cooled down just as quickly and is fine under load on the flat and general driving. Now it seems as though the turbo might have crapped itself as the hill also killed go forward motion and she slowed right down to 50 and struggled :(
     
  12. MyCrazy80

    MyCrazy80 Well-Known Member

    Have you found out the problem yet mate?
     
  13. cringedweller

    cringedweller New Member

    It's been a while and I apologise for not updating. The thermostat housing developed a pin hole right underneath in the corner and this hole eventually leaked and the housing had developed a small crack, probaly compliments of a couple of previous runs up the cape and SA. I was stuck but got hold of some 'knead it' and pressed it into the hole and into the crack for a neat finish. It has been like this for a few months now and I'm not sure how long it will last. A guy at work said he's used it and forgotten about it and it held up ok. I back flushed the radiator and fitted new gasket with goo on the thermostat. So far so good but now losing about 100ml per week
     
  14. muc the truck

    muc the truck Well-Known Member

    Is a new part available , if not a tig weld and a machine shop can surface grind it for you .
     
  15. cringedweller

    cringedweller New Member

    Thanks muc that's a great idea. I used to TIG weld a bit (got pretty good at it) but never thought of that. I found a new one at 'euro4x4parts' for 127 euro plus postage, that's more than 10% of what I paid for the whole car :)
     
  16. cringedweller

    cringedweller New Member

    With the exchange rate that's almost 20% of the cost of the whole car. There you go, I could swap the Rocky for 5 thermostat housings and have enough money left over for 24 bottles of nice cold beer:)
     
  17. dno67

    dno67 Well-Known Member

    I'd be surprised if there wasn't a toyota or similar part that couldn't be modified and adapted
    to suit.
     
  18. cringedweller

    cringedweller New Member

    Yes, good one. That thought has crossed my mind about lots of difficult to source Rocky parts. Just today i stopped on the way home to get an oil filter and the numbers on the boxes on the shelf miraculously skipped mine
     

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