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DIY coolant replace + flush

Discussion in 'News and Features' started by Izso, Sep 12, 2011.

  1. huakenny

    huakenny LB Performance
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    got bubbles i guess... toyota i think should have a bolt some where at thermostat housing to release the air trapped in d cooling system if not mistaken...try to have a look
     
  2. punk

    punk Senior Member
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    i check out tomoro the bolt because dark dy, the thermostat housing design same with this myvi..
    if i drive around will the buble air goes out automatically or it will trap inside?
     
  3. Izso

    Izso Boooooossst
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    You have to know the difference between air bubble and boiling bubbles. Most likely what you saw is the boiling bubbles. Air bubbles usually come in big groups or are pretty large. You probably can stop once it's settled down to some degree.

    Air bubbles trapped inside stay inside. The only thing bad about that is it's a bad conductor of heat but having said that one a or two bubbles isn't going to be catastrophic unless your car is super heavily modified and highly dependent on the radiator to stay cool...
     
  4. samurai76

    samurai76 5 Year | Silver

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    izso san...thx for the tutorial with pictures that ease everyone to perform the DIY...this was my 2nd major DIY after cleaning the TB...:biggrin:

    the volume of water in radiator = 1.5litres..while the volume in reserve tank=0.6litres...if you guys are using 'pure coolant', you can make some rough estimation amount of water acquired in the radiator/reserve tank VS qty coolant you should buy at the spare part shops ..please correct me if i am wrong...
     
  5. deroll

    deroll Member

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    I measured the amount of coolant at 2.8-3.3L including the reserve tank of 0.6 (at the full mark) here.
     
  6. Vincent0001

    Vincent0001 New Member

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    Do you put any sealant when connecting back the hoses? or simple insert back the hoses and clamp it, it should be work fine?
     
  7. gunnerzz

    gunnerzz 5 Year | Silver

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    If the contact surface is clean and smooth, no need to put sealant/gasket maker.
    Some mech uses sealent/gasket maker when they dont bother to clean the surface.
     
  8. Izso

    Izso Boooooossst
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    The pressure isn't as crazy as some other cars. Myvi shouldn't need the sealant but no harm adding it
     
  9. Vincent0001

    Vincent0001 New Member

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    I also not planning to adding it because thinking a bit trouble to remove and clean the sealant the next time, so I ask for opinion. Thanks your opinion. :-)
     
  10. vr2turbo

    vr2turbo 5 Year | Silver
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    Connecting point all clean don't need the sealants , but if have it helps the hose to slide in also......
     
  11. Vincent0001

    Vincent0001 New Member

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    Good point:driver::driver:
     
  12. abubin

    abubin Senior Member
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    Any idea why when I flush my myvi, it only take 2.2liter of coolant? I thought it should be like 4 liter.

    FYI, I did open the thermostat and flush all the water out. After that did run the engine for 15min to flush out the bubble.

    Also I see lots of soapy bubble. Wondering how to diagnose further on whether the engine head is blown or not. Cause don't see any leaks, tailpipe no smoke. Engine not overheating. Oil looks normal. Sifus, please comment.
     
  13. gunnerzz

    gunnerzz 5 Year | Silver

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    Did u drain using the radiator drain plug?

    Why did u think the head gasket is blown, is there anything happen prior to u doing the flushing?
     
  14. abubin

    abubin Senior Member
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    Yes, I did drain from the plug as well.

    Cause radiator is bubbling from the opening. Not sure why. One of the issue is blown head gasket. So trying to find out what is the reason.
     
  15. Vincent0001

    Vincent0001 New Member

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    Myvi which year? My Myvi 1.3 2009 total capacity(without reserve tank) is around 2.7 including everything inside the engine, shouldn't be 4 liter, 4 liter is alot. and the services manual mistaken written 5.7L, it should be around 2.7L.
    Flush out 2.2 L i think is normal as still some coolant inside the engine block.
     
  16. vr2turbo

    vr2turbo 5 Year | Silver
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    Wow, you guys really collect and measure? I just open top hose, take off radiator cap, start engine, let heat up, thermostat open, water flow out, keep filling water through radiator until clear clean water comes out from top hose. Fit back top hose, add coolant. then fill to max. Take car out for a run, later when engine is cool recheck water level in radiator and expansion tank......
     
  17. parakey

    parakey Senior Member
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    I noticed you dont drain from the bottom. Wont it be better to at least drain once, from the bottom since there may be solid/heavier contaminants at the bottom?
     
  18. vr2turbo

    vr2turbo 5 Year | Silver
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    I broke the plastic screw many times already, so nowadays don't release from there anymore.....lol
     
  19. Vincent0001

    Vincent0001 New Member

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    Where can you buy the plastic screw? spare part shop got sell?
     
  20. parakey

    parakey Senior Member
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    That radiator cork is relatively cheap, right? Few ringgit only
     

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