OUR VIDEOS GALLERY MEMBER SPONSORSHIP VENDOR SPONSORSHIP

User Tag List

Page 2 of 3 FirstFirst 123 LastLast
Results 11 to 20 of 22

Thread: Flush cooling system?

  1. #11
    Patrol Freak 10G's Avatar
    Join Date
    May 2016
    Location
    lower west victoria
    Posts
    1,084
    Thanks
    93
    Thanked 609 Times in 358 Posts
    Mentioned
    19 Post(s)
    Tagged
    0 Thread(s)
    OK, so I had a shot this today.

    I'm confused. I'm only getting around 5-6 litres out of the radiator, the manual says it holds around 13-15 litres.

    Firstly, I did a cold flush, just removed the drain plug out of the bottom of the radiator, removed the caps off the radiator and the pressurised rear tank thing. Put an oil pan under it that said it held 16 litres. It got about half filled.

    Secondly, replaced both radiator hoses, nothing came out of them. Filled it up with water from the tap, had the heater on flat out & engine running. Filled up radiator and the pressurised tank as needed. Went for a drive, got it up to 87. Got home and drained it. Only about 5-6 litres out again (about half the 10 litre bucket I used).

    The water is getting clearer with each flush which is good. Here's a thing. When I undo the radiator cap, the water is hot. When I undo the drain plug underneath, the water is cold, however hot water does eventually come out.

    Where's the missing 10 litres?

    Am I doing something wrong?

    Thanks for any help.
    .. give me land lots of land under starry skies above, don't fence me in ...

  2. # ADS
    Circuit advertisement
    Join Date
    Always
    Location
    Advertising world
    Posts
    Many

     

  3. #12
    Expert 0-TJ-0's Avatar
    Join Date
    Jan 2017
    Location
    South Australia
    Posts
    408
    Thanks
    284
    Thanked 252 Times in 162 Posts
    Mentioned
    7 Post(s)
    Tagged
    0 Thread(s)
    In the engine? I had this issue and i had to take the thermostat out to drain it properly.

  4. #13
    Patrol Freak 10G's Avatar
    Join Date
    May 2016
    Location
    lower west victoria
    Posts
    1,084
    Thanks
    93
    Thanked 609 Times in 358 Posts
    Mentioned
    19 Post(s)
    Tagged
    0 Thread(s)
    Ug. Just been reading that you should never use tap water. I did know that, but I thought it'd be OK for flushing???????

    I'm consistantly getting the same amount of water out every time I flush so I hope all that bloody tap water is coming out.

    Re thermostat, I was hoping that by getting the engine temp up to normal op temp, 87, the thermostat would be open and all the water would drain through it, maybe that just doesn't happen????
    .. give me land lots of land under starry skies above, don't fence me in ...

  5. #14
    Patrol Freak 10G's Avatar
    Join Date
    May 2016
    Location
    lower west victoria
    Posts
    1,084
    Thanks
    93
    Thanked 609 Times in 358 Posts
    Mentioned
    19 Post(s)
    Tagged
    0 Thread(s)
    I'm letting it drain overnight with the front of the car pointing down, maybe it'll trickle out over night?????
    .. give me land lots of land under starry skies above, don't fence me in ...

  6. #15
    Expert 0-TJ-0's Avatar
    Join Date
    Jan 2017
    Location
    South Australia
    Posts
    408
    Thanks
    284
    Thanked 252 Times in 162 Posts
    Mentioned
    7 Post(s)
    Tagged
    0 Thread(s)
    I reckon as soon as the water drops away from it the thermostat would cool enough for it to close. Dunno mate I'm no expert.

    I just used the hose to flush mine, let it drain then filled it with the good stuff after. Might not be ideal but I'm not I'm not paying the premium to flush it with the bottled stuff.

  7. The Following User Says Thank You to 0-TJ-0 For This Useful Post:

    10G (12th May 2019)

  8. #16
    Patrol Freak 10G's Avatar
    Join Date
    May 2016
    Location
    lower west victoria
    Posts
    1,084
    Thanks
    93
    Thanked 609 Times in 358 Posts
    Mentioned
    19 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by 0-TJ-0 View Post
    I reckon as soon as the water drops away from it the thermostat would cool enough for it to close. Dunno mate I'm no expert.

    I just used the hose to flush mine, let it drain then filled it with the good stuff after. Might not be ideal but I'm not I'm not paying the premium to flush it with the bottled stuff.
    That all sounds fair enough to me.

    So when you removed the thermostat, did you get alot more water out?
    .. give me land lots of land under starry skies above, don't fence me in ...

  9. #17
    Expert 0-TJ-0's Avatar
    Join Date
    Jan 2017
    Location
    South Australia
    Posts
    408
    Thanks
    284
    Thanked 252 Times in 162 Posts
    Mentioned
    7 Post(s)
    Tagged
    0 Thread(s)
    Yeah and it allowed me to stick a hose in one end and flush it through some what. I think there's a drain bung on the block somewhere that will drain a bit more again but I've never used it. Perhaps it might be worth finding that instead?

    Edit: On a td42 just for clarity sake.. but on my cruisers in the past I used to have to take the thermostats out to flush them properly as well.

  10. The Following User Says Thank You to 0-TJ-0 For This Useful Post:

    10G (12th May 2019)

  11. #18
    Patrol Freak 10G's Avatar
    Join Date
    May 2016
    Location
    lower west victoria
    Posts
    1,084
    Thanks
    93
    Thanked 609 Times in 358 Posts
    Mentioned
    19 Post(s)
    Tagged
    0 Thread(s)
    Morning after. I reckon about 2-3 litres leaked out overnight. Going to look at removing the thermostat today.

    Was reading my Haynes manual this morning. In their 'flushing the cooling system' section, they mention to get the garden hose, stick it in the radiator hose and turn on the tap! So maybe using tap water to flush with is OK????

    They also mentioned that the thermo housing has a drain plug and that it can take 30 mins for all the water to drain.
    .. give me land lots of land under starry skies above, don't fence me in ...

  12. The Following User Says Thank You to 10G For This Useful Post:

    0-TJ-0 (12th May 2019)

  13. #19
    Expert 0-TJ-0's Avatar
    Join Date
    Jan 2017
    Location
    South Australia
    Posts
    408
    Thanks
    284
    Thanked 252 Times in 162 Posts
    Mentioned
    7 Post(s)
    Tagged
    0 Thread(s)
    I need to get one of those manuals..

    Yeah have a look and see whats easiest. With the stat out you can push a fair bit of water through to get a good flush though. Just be careful with the bolts. I've read other people having issues with them seizing and snapping?

  14. #20
    Patrol Guru Bidja's Avatar
    Join Date
    Jul 2017
    Location
    Southern Table Lands, NSW
    Posts
    965
    Thanks
    808
    Thanked 752 Times in 443 Posts
    Mentioned
    23 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by 10G View Post
    Morning after. I reckon about 2-3 litres leaked out overnight. Going to look at removing the thermostat today.

    Was reading my Haynes manual this morning. In their 'flushing the cooling system' section, they mention to get the garden hose, stick it in the radiator hose and turn on the tap! So maybe using tap water to flush with is OK????

    They also mentioned that the thermo housing has a drain plug and that it can take 30 mins for all the water to drain.
    No need to remove thermostat housing(may not be straight fwd), but would enable full flush thru sys.
    Remaining water/coolant still in engine block. Drain via eng block plug.
    Understand that eng block drain plug is below oil filter and to get to it remove the oil filter drain into tray/bucket. Need to seal drain plug when finished_Read that"threebond grey sag type silicone" works and can pick it up at repco or most other automotive stores.


    If using same coolant type you can just drain radiator via bottom plug, then close off and fill with distilled water, warm up and operate full heater to circulate(few minutes) then drain via radiator plug again. Do it a few times. Must say I always only use genuine coolant and have good tank water so that is what I use to do the job. For me, even if changing coolant types this is what I would do anyway.

    Had ADRAD radiator joint in ACT do an A/C job for me few yrs ago and got them to do radiator / sys flush, think they just back flushed sys with tap/hose water back thru top heater hose at firewall(heater turned on). Pretty good tap water though.
    2008 GU WAG ST Manual CRD - To do the job

  15. The Following 2 Users Say Thank You to Bidja For This Useful Post:

    0-TJ-0 (12th May 2019), 10G (13th May 2019)

Page 2 of 3 FirstFirst 123 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •