Flushing cooling system on a rover 75 1800 turbo

andrewscruff · 25th October 2018, 06:49

Hi can anyone tell me the best way to flush out the cooling system on a 1800 turbo 75 before I do the anti freeze thanks andy

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ceedy · 25th October 2018, 07:56

bung in couple of dishwasher tabs and run it for a few days..

bigsi32 · 25th October 2018, 14:56

yep what he said.

Do this on My TF before flushing coolant.

You need to be sure to get all the detergent out so maybe refill the system at least once with water and run to temp then flush again.

T-Cut · 25th October 2018, 18:09

Quote:

Originally Posted by bigsi32

You need to be sure to get all the detergent out

Indeed. Dishwasher tablets are basically sodium metasilicate which is very alkaline. Aluminium readily dissolves in alkaline solutions, so to avoid etching the head and block, make sure the stuff is completely gone. What's wrong with a specially formulated cooling system flush? Home brew remedies might be cheap, but often come with hidden baggage.

TC

BigRuss · 25th October 2018, 22:43

Just done this on a KV6 by using a couple of dishwasher tablets.
I certainly wouldn't leave them in for a few days, just bring it up to temperature and leave it running for about half an hour.
Then flush the system with plain water and again bring it up to temperature again, repeat at least once more and then flush the system until any discolouration disappears and the water runs clear.
Only then refill and bleed the system of air with the coolant mixture of your choice.

Russ

T-Cut · 26th October 2018, 10:08

Quote:

Originally Posted by andrewscruff

Hi can anyone tell me the best way to flush out the cooling system on a 1800 turbo 75 before I do the anti freeze

A simple coolant renewal only requires a fresh water/hosepipe type flush. If the recommended antifreeze mix has been used and remains in normal condition and visually transparent, the system won't need any home brew or proprietary flushing agent. If the old coolant is cloudy, or badly discoloured/rusty looking, something more aggressive might be needed to loosen any detritis. Oil emulsification from head gasket failure is a different kettle of fish and needs a powerful, proprietary detergent formula (like the Holts product). So, it really depends on what you've got to replace.

TC

25th October 2018, 06:49	#1
andrewscruff Avid contributor rover 75 Join Date: Dec 2013 Location: bishops stortford Posts: 194 Thanks: 71 Thanked 10 Times in 9 Posts	Flushing cooling system on a rover 75 1800 turbo Hi can anyone tell me the best way to flush out the cooling system on a 1800 turbo 75 before I do the anti freeze thanks andy Sent from my iPhone using Tapatalk

25th October 2018, 07:56	#2
ceedy This is my second home All Trophy Blue ,ZT260#50 , ZT CDTI Auto, ZR105+ and 1.8T Firefrost spoiling the Set . Join Date: Nov 2006 Location: Nr Sherborne But in Somerset.. Posts: 6,075 Thanks: 916 Thanked 1,214 Times in 768 Posts	bung in couple of dishwasher tabs and run it for a few days.. __________________ The Three Bloo's Wifey's Zr105, MY CDTI & 260 #50 and Number One sons 1.8T in Firefrost When I were a lad Zero to 142 in 10.25 secs at the Pod on my Blown Norton. 210 Kart Champ in 70's

25th October 2018, 22:43	#5
BigRuss Premium Trader 75 CDT Tourer,2.5 Launch Saloon, Omipro MG/Rover (T4) Join Date: Jul 2007 Location: Liversedge, West Yorkshire Posts: 5,405 Thanks: 1,105 Thanked 1,340 Times in 661 Posts	Just done this on a KV6 by using a couple of dishwasher tablets. I certainly wouldn't leave them in for a few days, just bring it up to temperature and leave it running for about half an hour. Then flush the system with plain water and again bring it up to temperature again, repeat at least once more and then flush the system until any discolouration disappears and the water runs clear. Only then refill and bleed the system of air with the coolant mixture of your choice. Russ __________________ Replacement Key Service http://https://the75andztclub.co.uk/...d.php?t=244732 Full T4 Testbook diagnostics available. Diesel ECU repair and replacement. Options enabled or disabled as required. Diesel X-Power 135 and 160bhp, Rover 1.8T 150 to 160 MG 160 V6 to 177 upgrades available P.M. for details.

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25th October 2018, 14:56	#3
bigsi32 Newbie MG ZT Join Date: Apr 2018 Location: Bedfield Posts: 29 Thanks: 0 Thanked 1 Time in 1 Post	yep what he said. Do this on My TF before flushing coolant. You need to be sure to get all the detergent out so maybe refill the system at least once with water and run to temp then flush again.