1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
  2. Welcome To LandyZone!

    LandyZone is the biggest Land Rover forum on the net. We have plenty of very knowledgable members so if you have any questions about your Land Rover or just want to connect with other Landy owners, you're in the right place.

    Registering is free and easy just click here, we hope to see you on the forums soon!

New radiator

Discussion in 'Land Rover Discovery' started by welshspringer, Jul 19, 2016.

< Previous Thread | Next Thread >
  1. welshspringer

    welshspringer Member

    Joined:
    Jun 19, 2014
    Posts:
    96
    Likes Received:
    7
    Location:
    Merthyr Tydfil
    My radiator blew last Sunday, stopped engine within 200yards (on a very busy-fast road) after seeing the guage shoot to the red. Fitted new rad yesterday, since fitting having periods of high temps and back pressure in header tank after travelling at normal temps for some 5 - 6 miles, pretty sure I have airlocks. Does anyone have a remedy to rid the system of air locks?
     
  2. Paul D

    Paul D Old, nackered 'n broke, but the Landy is fine . :) LZIR Despatch Agent

    Joined:
    Jun 3, 2007
    Posts:
    14,902
    Likes Received:
    2,516
    Location:
    Doncaster
    I open both the thermostat and radiator caps, and fill the system with the engine ticking over. Always seemed to work so far .. :)
     
  3. ruffday

    ruffday Active Member

    Joined:
    Mar 26, 2009
    Posts:
    901
    Likes Received:
    15
    Location:
    Sheffield
    yes undo the header tank and lift it as high as you can and fix it as best you can you want the full level higher than any other part of the cooling system.
    Then run it up and bleed as normal it usually works for me.
     
  4. welshspringer

    welshspringer Member

    Joined:
    Jun 19, 2014
    Posts:
    96
    Likes Received:
    7
    Location:
    Merthyr Tydfil
    Thanks for the advice, still being an obstinate air lock, opened up thr heater pipes a lot of air in them. Have now got the disco up onto ramps.
     
  5. welshspringer

    welshspringer Member

    Joined:
    Jun 19, 2014
    Posts:
    96
    Likes Received:
    7
    Location:
    Merthyr Tydfil
    Hi

    Have tried eveything mentioned still a problem, there are bubbles out of the thermostat plug when engine is running. Thought at one stage it was cured, took car for a local try,all well until climb a rather long hill. By the time reached the top guage registering to the top of the normal range. Header tank was venting and the coolant was "cold" Taking car home and the guage stayed at normal. Have the feeling that the head gasket has blown. Your views would be appreciated.
    Run car on blocks this morning for approx 30 mins, flow thro header tank NO bubbles, hadn't quite reached normal temp.
     
    Last edited: Jul 21, 2016
  6. Paul D

    Paul D Old, nackered 'n broke, but the Landy is fine . :) LZIR Despatch Agent

    Joined:
    Jun 3, 2007
    Posts:
    14,902
    Likes Received:
    2,516
    Location:
    Doncaster
    When I take the thermostat plug off it isn't just bubbles, it becomes a proper flow of water ..

    OK, so the way I refilled mine a few weeks ago after changing the water pump and draining/flushing the radiator/engine block.

    Remove thermostat plug, remove radiator plug, remove reservoir cap. Fill to the brim and over with water/coolant through thermostat, fill, again to the brim and over, through radiator, turn engine on and run at tickover while filling the reservoir, overfill at this point, and coolant should be flowing out the thermostat, so fit the plug/cap, then the radiator, fit the cap while coolant is flowing. Check level in the reservoir and adjust, before refitting cap.
     
  7. offroadmad

    offroadmad Active Member

    Joined:
    Feb 21, 2011
    Posts:
    438
    Likes Received:
    2
    Location:
    somerset
    i had this problem with a bmw - i found the only thing that worked was to switch on the ignition with heater set to hot ( without the engine running ) - i then filled the system with the top rad hose disconnected from the rad until water came out of the disconnected hose - refit hose, start engine & with the cap off squeeze all hoses & you will see any remaining air bubbling up in to the header tank - this process has always worked for me ! i think where ppl go wrong is to put the cap on whilst there is still air present causing over pressurisation - another tip is to get the front end up in the air when bleeding, may also help - good luck
     
  8. pete1987RRC

    pete1987RRC Well-Known Member

    Joined:
    Nov 27, 2013
    Posts:
    5,101
    Likes Received:
    2,361
    Location:
    East Midlands
    Not sure what engine it is but a constant flow of bubbles sounds like a head gasket.

    Get the coolant checked
     
    Disco1BFG likes this.
  9. mr glee

    mr glee Active Member

    Joined:
    May 4, 2012
    Posts:
    305
    Likes Received:
    27
    Location:
    braintree
    Sorry but it really does sound like the head gasket has gone had this on a mk3 golf first burst a hose then radiator went fix that 50 miles later the heater matrix blew while doing 70 mph filling the inside of the car with steam it was like a James bond film in there "time to die Mr bond"
     
  10. welshspringer

    welshspringer Member

    Joined:
    Jun 19, 2014
    Posts:
    96
    Likes Received:
    7
    Location:
    Merthyr Tydfil
    I was doing 50mph uphill, I had been checking the temp about rvery mile or so, from the last time I checked the car had traveled about 400 yds when the needle shot into red, switched off engine coasted onto verge, radiator was ;like Niagra. No steam in fact only exterior visual was the water flowing out of the rad. If it is the hd gasket I just hope that the head has not cracked, only 2 yrs old with 9k travelled. Heres hoping, it is being tested this morning, it is like being in the dentist.

    Deffinitely a head gasket, will not know about head until Monday, fingers crossed.
     
    Last edited: Jul 22, 2016
  11. welshspringer

    welshspringer Member

    Joined:
    Jun 19, 2014
    Posts:
    96
    Likes Received:
    7
    Location:
    Merthyr Tydfil
    Have come home after 1 week away (touch of pneumonia) and no movement on my Disco. Still had no prognosis of actual problem.
    Anyone have an idea how long it takes to take off an refit the cylinder dead. In years gone by could have done the job myself, afraid well past that stage.
    Is it correct that Land Rover do not recommend skimming a TDI head and if there is more than a very small warping, head should be discarded?
    Can purchase a new head complete and all gaskets for £350
     
  12. Gazbo

    Gazbo Well-Known Member

    Joined:
    Dec 23, 2010
    Posts:
    3,871
    Likes Received:
    2,975
    Location:
    Cooktown, North Queensland, Australia.
    From what I have experienced, any head warpage more than .004 thou, you can scrap the old head, the joint surface is treated or hardened somehow, any excessive machining will leave soft spots that will cause the next HG failure in a short time. Better to only have to do the job once, also use a new set of head bolts, as the bolts are TTY and the old ones will just stretch if used again.
     
  13. hoopfish

    hoopfish Well-Known Member

    Joined:
    Aug 19, 2012
    Posts:
    2,315
    Likes Received:
    385
    Location:
    East Sussex
    I changed mine a few months back. It took a day all in. The longest bit was getting the head checked.
     
  14. Disco1BFG

    Disco1BFG Well-Known Member

    Joined:
    Mar 18, 2015
    Posts:
    4,257
    Likes Received:
    1,867
    Location:
    Buxton
    +1 on the new bolts - they can be re-used - but, IMHO, it aint worth it. £20 buys new bolts - £40 new bolts and all the gaskets....
     
  15. welshspringer

    welshspringer Member

    Joined:
    Jun 19, 2014
    Posts:
    96
    Likes Received:
    7
    Location:
    Merthyr Tydfil
    Thanks Gentlemen. All advice TAKEN, will be on the mechs neck as soon as he gets back to work.
     
  16. welshspringer

    welshspringer Member

    Joined:
    Jun 19, 2014
    Posts:
    96
    Likes Received:
    7
    Location:
    Merthyr Tydfil
    At last head taken off and sent for testing. Passed the pressure test, been machined ready for fitting tomorrow new bolts and gaskets. Should have my disco back early next week.
     
    Paul D likes this.
  17. DaisyDriver

    DaisyDriver Member

    Joined:
    Jan 8, 2014
    Posts:
    80
    Likes Received:
    14
    Location:
    Canberra
    Before you spend any more money, change the expansion tank cap for an OEM item. Daisy's radiator blew out 3 years ago. She was one of those Discos that would drop her coolant 1/2 inch below level and then stay there. A week after changing the rad the top hose blew off. I may have failed to connect it correctly but if I had why did it last for a week? After many dire warnings about blown cylinder head gaskets I got the advice I am repeating here. I changed the cap for a deal part and since then Daisy has not lost ANY coolant in 18 months. I think a jammed cap was the root cause of the blown rad and top hose.
     
  18. welshspringer

    welshspringer Member

    Joined:
    Jun 19, 2014
    Posts:
    96
    Likes Received:
    7
    Location:
    Merthyr Tydfil
    Thanks for the tip, will get a new cap tomorrow.
     
  19. welshspringer

    welshspringer Member

    Joined:
    Jun 19, 2014
    Posts:
    96
    Likes Received:
    7
    Location:
    Merthyr Tydfil
    HELP HELP HELP
    As mentioned disco has been three weeks with the battery disconnected. Managed to get ignition but NO power to lights,windows, dashboard, central locking.
    All help required please, have not got a clue to the problem except for the thought that due to time disconnected a VCU has
    stopped working
     
  20. welshspringer

    welshspringer Member

    Joined:
    Jun 19, 2014
    Posts:
    96
    Likes Received:
    7
    Location:
    Merthyr Tydfil
    Found the problem, 100amp fuse. Tried to find anything relating to 100amp fuse in Haynes, not mentioned.
     
< Previous Thread | Next Thread >