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cooling system clean

Hi all;

Would someone be able to advise the best way to clean a Grey Motor cooling system?

The water in mine is muddy brown with a bit of sediment floating in it and I'm about to give it a flush. I've heard that it's best to steer clear of the cleaners as they're a bit savage.

Also, could anyone recommend a good additive for the water?

Any advice much appreciated - thanks in advance!

Tony EJ

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ive used clothes washing soap powder in the past, wack a handful in the radiator and go for a spin then dump it out the bottom hose...don't get burnt. flush with fresh water till no bubbles. I would use plain water with a minor amount of coolant. coolant and old engines equals leaks so I only use a weak mix. unless you hot tank the block and renew the radiator core, the water will always be rusty due to the build up of scale and crud around the cylinders over the last 40 years. hard to clean from the outside. may not be advisable with an old block, you may start a leak you cant stop.

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I'd be inclined to flush the rad up and down, refill and go for a drive. Repeat. Then top up with a good quality corrosion inhibiting fluid, either the mix type or pre-mix type, and get the type suitable for cast iron blocks. Make sure you use de-ionised water for the final fill if mixing. If the radiator is heavily scaled you'd be better off with a professional clean.

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"It was then I knew I'd had enough, burned my credit card for fuel
Headed out to where the pavement turns to sand...."

Cheers, John

Thanks very much for the advice - I'll give it a go!

Tony EJ

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caustic soda can work very well, mix a litre or so up and add to the radiator as a liquid, repeat as necessary and flush well after its done its job.

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I've used a 1/2 a tablet of dishwasher powder/stuff and it worked good but I made sure I cleaned the system out as best as I could.

Use some long life coolant after.

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Disclaimer :- The above is purely speculation and is only posted for entertainment purposes!!!

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