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Thread: Flush cooling system?

  1. #1
    Patrol Freak
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    Flush cooling system?

    Heading away for 4 weeks solo into the outback in June/July so not too hot.

    Don't think the Patrol has ever had its cooling system flushed. It's never overheated and I don't think I've ever seen it hit 94 degrees.

    It's a 2013 Y61 CRD and has been regularly serviced.

    Just wondering if I should flush it out as a wise preventative measure or do cooling systems these days not need to be touched unless they play up??????

    Thanks for any advice.
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    The master farter
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    Coolant should be changed every 2 years, about. So if its never been done. Its overdue. But. Will you be opening a can of worms doing it so close to your trip? If your going to do it, I would be doing it now. Also grab a small tube of Silver seal or similar and leave it in the tool box just incase you spring a leak.

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    10G (30th April 2019)

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    I've got 6 weeks until we leave and I drive the Patrol every day, so I reckon if something gonna give, it'll give before we leave.

    As i live where the water is really calcified I was thinking of filling it with distilled water. Am I being over cautious or wise????
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    Quote Originally Posted by 10G View Post
    I've got 6 weeks until we leave and I drive the Patrol every day, so I reckon if something gonna give, it'll give before we leave.

    As i live where the water is really calcified I was thinking of filling it with distilled water. Am I being over cautious or wise????
    Wise mate. The manual says 50/50 coolant and distilled water.

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    Is just a drain and a bit of a flush through with the hose all that's needed or do I need to go a bit more indepth?
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    If you want a Coolant flush only - Drain it, flush the Rad for a minute or two, fill with tap water, run it for 5 minutes with Heater on Hot, drain it, flush it, fill with Coolant at manuf specs (some coolant is premixed some you dilute yourself), burp the system, top up if needed.
    Dolphins are so smart that within a few weeks of captivity, they can train people to stand on the very edge of the pool and throw them fish.

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  11. #7
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    Thanks ET.

    Are those radiator flush formulas worth using or are they just snake oil?

    I also read that the engine block has a drain plug on it, but it can be tricky to get it to reseal again properly. Is it worth taking that plug out? It's literally been decades since I've flushed a radiator, all I can remember is that I always get wet.

    Thanks again.
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    IMHO only and others may disagree...

    If your only changing coolant then dump it, flush it, fill it and leave all the drain plugs etc etc alone and don't bother with a descaling agent etc.

    If you want it descaled, block drained, rad core cleaned etc etc then I would head off to the Rad Man of your choice and get "the works" done.
    Dolphins are so smart that within a few weeks of captivity, they can train people to stand on the very edge of the pool and throw them fish.

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    Quote Originally Posted by 10G View Post
    Thanks ET.

    Are those radiator flush formulas worth using or are they just snake oil?

    I also read that the engine block has a drain plug on it, but it can be tricky to get it to reseal again properly. Is it worth taking that plug out? It's literally been decades since I've flushed a radiator, all I can remember is that I always get wet.

    Thanks again.
    I would agree with ET, that if you want a full radiator flush get a pro to do it. Potential problem with off the shelf flushes is the possibility that some of the loosened gunk gets stick somwhere and restricts the flow unless the flush is done correctly. If your cooling is ok and the fluid is clean, no rust just do a coolant change. If there is rust or gunk in the system, get it professionally done.
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    Yep, I reckon I agree, thanks guys the words of wisdom. I have 2 new radiator hoses that I bought about 10 months ago as spares. Think I might fit them at the same time & keep the oldies as spares.
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