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| lambert.the.farmer Member Since: 11 Apr 2012 Location: harrogate Posts: 2006   
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Probably been asked before but what is a good(safe and effective) brand of rad flush to use on an all aluminium engine and rad?
Cheers in advance. Rhubarb and custard let fly with their secret weapon. |
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30th Sep 2016 6:10am |
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| RED-DOT Member Since: 29 Jun 2009 Location: stirling Posts: 2363 
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If it is oil contamination whether it is in the coolant system or an intercooler or a oil cooler the big truck companies flush with liquid clothes detergent. They use a whole bottle twice then a good flush with water but for a Defender i would cut it back to half a bottle. 2008 RS4 gone, 123d M Sport, and a Puma 90 XS..
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30th Sep 2016 9:50am |
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| lambert.the.farmer Member Since: 11 Apr 2012 Location: harrogate Posts: 2006
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It's the Jimny actually but the principles are the same. There is no actual reason for wanting to do it beyond wanting to refresh the coolant in readiness for winter, there are no blockages or any obvious sediments in it and the rad is only a year old anyway, but it has been suffering from a very minor drip from the water pump which is now replaced but I only had enough coolant to mix at about 25 pc when I did the pump so I had thought that as I need to up the concentration I may as well give the insides a clean while I'm there? Rhubarb and custard let fly with their secret weapon.
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30th Sep 2016 11:43am |
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| Retroanaconda Member Since: 04 Jan 2012 Location: Scotland Posts: 2647
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My usual process when changing coolant:
1. Drain old coolant and dispose. 2. Disconnect top and bottom hoses. 3. Insert hosepipe into top hose and run until water emerging from bottom hose is clear. 4. Repeat in reverse - water into bottom hose. 5. Flush and back-flush radiator in the same way. 6. Re-assemble cooling system/pipes. 7. Ascertain capacity of system from handbook. 8. Add correct amount of coolant necessary to achieve desired mix strength etc. 9. Top up with fresh water. 10. Run engine up to temperature to mix, check for leaks. |
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30th Sep 2016 11:50am |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20375 
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I prefer ready mixed coolant, yes more expensive but we have hard water here.
Maybe just aged coolant but I noticed a slight drop in running temp too which is a good thing once replaced. $W33T $0U7H3RN $UG4R 🇬🇧🏴🏴🏴🇮🇪🇺🇸⛽️🛢️⚙️🧰💪 |
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30th Sep 2016 11:56am |
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| lambert.the.farmer Member Since: 11 Apr 2012 Location: harrogate Posts: 2006
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Thanks all. I think I had intended to flush it something like that cheers retro. I'm lucky enough to have nice soft water so have not needed the pre mixed stuff. Rhubarb and custard let fly with their secret weapon.
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30th Sep 2016 12:17pm |
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| dorsetsmith Member Since: 30 Oct 2011 Location: South West Posts: 4554 |
if you can use rain water from a water but no problems with ground contamination and free
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30th Sep 2016 12:25pm |
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| lambert.the.farmer Member Since: 11 Apr 2012 Location: harrogate Posts: 2006
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Our shed roofs are under trees and whilst the water off them is certainly free of charge that's about all it is free of, it definitely ain't got a place in my engine.
 Rhubarb and custard let fly with their secret weapon. |
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30th Sep 2016 12:41pm |
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| dorsetsmith Member Since: 30 Oct 2011 Location: South West Posts: 4554 |
free from ground contamination i.e. nitrate, line stone, all-so PH neutral engine manufacturers recommend using deionized water to mix with antifreeze, deionized water in large a mounts is price i have used rain harvest water in engine small and large i.e. 2x 205 LTR of antifreeze and rain harvest water to mix 50/50 engine cooling system clean as a bell 8 year later  |
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30th Sep 2016 2:25pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20375
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That'd be okay if you were prepared to fine filter it, personally I wouldn't both.
Each to his own. $W33T $0U7H3RN $UG4R
🇬🇧🏴🏴🏴🇮🇪🇺🇸⛽️🛢️⚙️🧰💪 |
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30th Sep 2016 2:47pm |
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| pannawonica Member Since: 21 Nov 2010 Location: Clackline Western Australia Posts: 568 
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Just changed the coolant on Puma 2.4 110, drained refilled with rain water (Not on water supply) redrained and refilled deionised water and coolant. I'm on this week with the MG RV8 same process but with silicone replacement pipes. It has a Land Rover engine in too!
works for me! |
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1st Oct 2016 10:12am |
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