Cooling system - Page 2
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This is a discussion on Cooling system within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Looking at the picture. You have the older style radiater header tank(painted black). Some time the paint on the inside ...

  1. #16
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    Looking at the picture.

    You have the older style radiater header tank(painted black). Some time the paint on the inside flakes off and then circulates within the engine and causes weird issues.

    You have the older style radiator. The newer ones have a cap on the radiator itself.

    You really need to get a pressure test done on the system by a radiator shop. They replace the cap on the header with a tool and then pressureize the system and look for leaks.

    Some times the hoses only leak out under high pressure( you may have a pin prick).

    Try the flush first then get a pressure test.

    Car should be cold
    1. Drain out old coolant
    2. Fill coolant via header tank slowly (to prevent air locks) approx fill + 7 l
    3. put rad cap on
    4. turn heater on full hot. run interrior fans
    5. start engine. run engine at +2000 -2500 rpm until rad fans cycle twice
    6. Switch off engine, wait for it to cool
    7. remove cap. turn cap slowly to release pressure(becareful not to burn yourself)
    8. start engine fill header tank
    9 check if top hose is full of water. press it
    10 put rad cap back on. drive it around the block
    11 repeat 6,7,8
    12 it may need a few more bleeds to get all the air out

    Alternate way to get out the air (note you must have already put in the coolant)

    1 remove header tank raditor cap.
    2. run engine at fast idle
    3. slowly fill water in header tank.
    4. massage top radiator hose (as you press it in and release it(the action sucks the water into the radiator)
    5 water will bubble out of the top of the header tank. (burp) do this until all the water stops flowing out.

    Note you must have the heater on to bleed all the air outta the system.

    These old style rads at a pain to get all the air out.
    Last edited by silver6933; 03-03-2008 at 05:12 AM.

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  3. #17
    Registered User tarmacsti's Avatar
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    Thanks alot for the info... of all the searching on the net your post has been the most informative!

    (I think the most important piont I kept missing is to have the heater on inside the car.)

    I will try and feed back!
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  4. #18
    Registered User rr1911's Avatar
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    Quote Originally Posted by tarmacsti View Post
    Thanks alot for the info... of all the searching on the net your post has been the most informative!

    (I think the most important piont I kept missing is to have the heater on inside the car.)

    I will try and feed back!
    im glad i was no help
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  5. #19
    Registered User tarmacsti's Avatar
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    Quote Originally Posted by rr1911 View Post
    im glad i was no help
    We were on the right track,
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  6. #20
    Registered User rr1911's Avatar
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    its all good
    i was j/k
    Army Ranger For Life ! Thin Blue Line
    Military Militia # 1911/ Blobeye Syndicate # 1911/ Modifier's Anonymous # 1911/ Hawk-Eye Alliance # 1911
    All We'll Drive
    DIFFERENT STROKES
    EVEN MY DENTIST TOLD ME FLOSS 7 DAYS A WEEK
    POST WH0RE KING

  7. #21
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    Note you may also have

    1. fail ed/ing thermostat
    2. failing water pump
    3. faulty cap
    4. blockage
    5. wrong coolant ratio
    6. buildup on inside of rad(that rad is over 3 years old(they have not been supplied in SA for that long.)
    7. failed top hose
    8. loose OEM clamps.
    9. crack under oem hose clamps.(you might be able to cut the end)
    10. crack on turbo coolant line.
    11. failing clamps on header tank(VERY common)
    12. sweat between top end tank and rad(more common with 1.1bar cap)
    13. faulty water temp sensor(unlikely)

  8. #22
    Registered User tarmacsti's Avatar
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    How about the buildup inside that bottle? That stuff could also be causing some sort of problem?

    Like you mentioned in;

    1. fail ed/ing thermostat
    2. failing water pump
    4. blockage
    6. buildup on inside of rad(that rad is over 3 years old(they have not been supplied in SA for that long.)

    What if I remove the thermostat and leave it out?
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  9. #23
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    Quote Originally Posted by tarmacsti View Post

    What if I remove the thermostat and leave it out?
    That will result in a blown head gasket eventually.

    The stuff coming outta the overflow bottle:

    1. is it oily?
    2. or does it look like milkshake?

  10. #24
    Registered User tarmacsti's Avatar
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    okay scratch that idea...
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  11. #25
    Registered User 4cyturbowrx's Avatar
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    I hope you didnt put regular water in there, you need distaled water

  12. #26
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    distilled water?

    Why must you use distilled water?

  13. #27
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    you don't "have" to, but using regular water leaves the risk that the minerals are other items in tap water can degrade the efficiency of the cooling system and/or leave deposits in the cooling system. Distilled water is extremely cheap and is extremely easy / inexpensive insurance.
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