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Thread: How do I get rid of air in my td5 cooling system???...HELP

  1. #1
    Join Date
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    How do I get rid of air in my td5 cooling system???...HELP

    Hi all
    I have recently changed all the radiator hoses, as well as the thermostat and expansion tank cap on my td5. Now while I do not have any leaks, I keep hearing the sound of water flowing when inside the car. I've bled the system about 3 times now. I did this by letting it idle to operating temperature with the expansion cap off and heater running on full, and also constantly checking for air coming out of the bleed screw on the top hose. The last time I did this, the car was on a slight incline, as I thought this might help to get rid of the air...but there is still air in there.
    I can hear it mostly on start up, but cruising on the highway it is quiet. But then, when driving in town, where the car is constantly changing revs from slowing down and speeding up, you can hear the slooshing sound again. It is the worst when taking off from say a traffic light or when increasing speed from say 60 - 80 kph.

    Any help would be much appreciated...ths issue is getting really frustarting.

  2. #2
    Shaker Guest
    I believe you need to unclip the expansion tank & raise it a couple of inches when you are filling the system.

  3. #3
    Join Date
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    As Shaker said.
    Here are the instructions from the D2 workshop manual:

    TD5 Refill
    1. Flush system with water under low pressure.
    Do not use water under high pressure as it
    could damage the radiator.
    2. Fit new sealing washer to drain plug. Fit and
    tighten drain plug in coolant pump feed pipe.
    3. Fit access cover to underbelly panel.
    4. Prepare coolant to required concentration.
    5. Remove bleed screw from top hose.
    6. Unclip the bleed hose from the battery box.

    7. Unclip the expansion tank from its mounting
    bracket, remove the expansion tank cap and
    raise the expansion tank vertically 10 cm (4 in).
    Retain the tank in this position.


    8. Slowly fill the system through the coolant
    expansion tank until a steady flow of coolant is
    emitted from the bleed hole.
    9. Fit the bleed screw, then, with the expansion
    tank still raised, continue filling the system until
    coolant level reaches the cold level mark on
    expansion tank.
    10. Fit expansion tank filler cap, fit the expansion
    tank to its mounting bracket and clip the bleed
    hose to the battery box.
    11. Start and run engine until normal operating
    temperature is reached, and check for leaks.
    12. Switch off engine and allow to cool.
    13. Check for leaks and top-up coolant to the cold
    level mark on expansion tank.

    Regards

  4. #4
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    Yes thanks, I do own the workshop manual and Rave. I was more looking for another way to do it without draining and flushing th system seeing as I have just put new coolant in. I'm going on a trip this weekend, and don't have any time to flush the system and so forth. Is there any way to get rid of the air, without flushing and refilling the system?

  5. #5
    Join Date
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    filling a coke bottle with coolant and inverting it into the header tank can also help sort it out.
    Dave

    "In a Landrover the other vehicle is your crumple zone."

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  6. #6
    Join Date
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    Td5 coolant air bleeding

    Find some thin clear hose (i.e. irrigation or fishtank) that is a tight, leak free fit in the top radiator hose bleeder hole. Hang the reservoir as high as possible from bonnet. Run hose into (clean) bucket of coolant solution. Use a (clean) stirrup pump (such as an Allemite) to pump coolant from bucket back up to reservoir. Can take a while until coolant runs bubble free but does eventually work. Try squeezing or tapping all the hoses and fuel-cooler to release any air pockets. You may hear the bubbles moving around until they are gone. Running the engine seemed to make the bubbles smaller and harder to remove.
    This has worked well for me three times (waterpump, full hose/thermostat/cooler o-ring replacement and lately cylinderhead gasket/dowell change.

    Hope this helps, regards Jason M.

  7. #7
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    Aren't there any bleed screws on the hoses from and to the heater? You did not state if you were getting warm air from the heater whilst running and bleeding. Hearing the sound of flowing water almost suggests the heater as the culprit. Make sure you bleed the heating system as this is a rather common place to have an air lock.
    Johannes

    There are people who spend all weekend cleaning the car.
    And there are people who drive Discovery.

  8. #8
    Join Date
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    The heater does get warm, but it takes a while to get hot. I am also thinking it is the heater, but can't find any bleeding points for it.

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