Cooling system
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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; Hi everyone, noticed last night for the 2nd time my temp needle raises into the hot while standing still... and ...

  1. #1
    Registered User tarmacsti's Avatar
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    Cooling system

    Hi everyone, noticed last night for the 2nd time my temp needle raises into the hot while standing still... and when I pull off and drive it comes down to the normal operating temp... fan operates as per normal.

    When I got home I checked the reservoir and it was full of water... the car was still hot so I didnít want to open the accumulator res, itís like the water is not circulating?
    So this morning I did the same check and saw that everything was back to normal... could it be that the THERMOSTAT gets stuck?
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    Registered User rr1911's Avatar
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    when is the last time you flushed the system ?

    u might want to burp it
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    Registered User tarmacsti's Avatar
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    Sounds like a plan Batman! Can you tell me how to do it please?

    thanks!
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    Registered User rr1911's Avatar
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    take the upper radiator cap off(the one closest to the turbo) and start the car add water till all of the air comes out... also squeeze the radiator hose a few times to help
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    Registered User tarmacsti's Avatar
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    Dude youre a Life saver, I will try that!
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    Registered User rr1911's Avatar
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    Quote Originally Posted by tarmacsti View Post
    Dude youre a Life saver, I will try that!
    thanks i aim to please
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  8. #7
    Registered User tarmacsti's Avatar
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    Ok here goes;
    1.Before I started the car I opend the radiator res... some buildt up air escaped?
    2.I started the car with the cap off and filled it with some water, it took about 500ml
    3.As the car heated up I gradualy added more water... some bubbles did boil out and like you said by pressing the hose coming from the radiator it let out some more bubbles.
    4.Everything looked fine water wasnt getting really hot so I waited until the fan kicks in... knowing the thermostat will open before the fan kicks in.
    5.Then the water really started to boil out and the fan kicked in soon after.
    6.I shut down the car and placed the cap back on.

    Anything I missed?
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  9. #8
    He simply abides. SD_GR's Avatar
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    You may have to repeat the process to get all the air out; time will tell. However, by simply doing all that you've confirmed two crucial things: that the thermostat opens and that the rad fan kicks in.

    How did this all start? Did you flush the coolant recently or what?
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    Registered User tarmacsti's Avatar
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    Yeah its reasuring...

    Well I poored a bottle of antifreeze in and replaced the stock cap with a hks one. <--- Could any of these be contributing factors?
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    He simply abides. SD_GR's Avatar
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    Quote Originally Posted by tarmacsti View Post
    Yeah its reasuring...

    Well I poored a bottle of antifreeze in and replaced the stock cap with a hks one. <--- Could any of these be contributing factors?
    Why were you low on antifreeze? Is there a leak somewhere or? Does the replacement radiator cap have the same pressure rating as the original?
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    well buddy unfortunately i just blew out my endtanks today.

    On these model years

    usually the temp gauge above normal indicates > 100C

    You may have gotten air in the system if you recently replaced the coolant.

    But if you did not replace the coolant recently, then get a HG check at a radiator place. You may also want to look for coolant leaks(check for the dried stains).

    Also your car is old enough to need a good flush

    It is really hot now in SA

  13. #12
    Registered User tarmacsti's Avatar
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    Quote Originally Posted by SD_GR View Post
    Why were you low on antifreeze? Is there a leak somewhere or? Does the replacement radiator cap have the same pressure rating as the original?
    I kept topping it up with the antifreeze, poored the whole bottle in over a 2day spread. The hks cap has 1.1kg rating on it...

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    Registered User tarmacsti's Avatar
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    Quote Originally Posted by silver6933 View Post
    well buddy unfortunately i just blew out my endtanks today.

    On these model years

    usually the temp gauge above normal indicates > 100C

    You may have gotten air in the system if you recently replaced the coolant.

    But if you did not replace the coolant recently, then get a HG check at a radiator place. You may also want to look for coolant leaks(check for the dried stains).

    Also your car is old enough to need a good flush

    It is really hot now in SA
    I must add, that when I got the car it looked like the radiator was replaced, but its only acting up like 2 months later... could be many things, me driving the car harder or weather changing, call it what you like...
    I cant see any recent stains... there is alot of stains from before I had the car... my guess is the radiator blew and they replaced it cause it looks brand new..


    After doing the "burp" (excuse me) the car seems alot better...?
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  15. #14
    Registered User tarmacsti's Avatar
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    Oh and in the interm I have replaced the hks cap with the original one...

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  16. #15
    Registered User tarmacsti's Avatar
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    Update,
    I have done the burping of the sytem now a couple of times and notice that the only time the car temp clibs is after I have driven it really hard... if I then open the cap (after it cooled down) it does blow air out and it takes a bit of water like 250ml to bring it to the brim.

    Also I cleaned out the filler tank next to the radiator and noticed that it was filthy, the buildup inside it looked like mud! So I can only imagine what the rest of the system must look like.

    I will be doing a full flush of the system soon, anyone got any tips on doing this?

    sweet!
    Attached Thumbnails Attached Thumbnails sti_new_engine.jpg  
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