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[Lazydocker]

Right, in an attempt to cure the overheating issue when towing (as I can't find anything else wrong at all!) I'm going to give the coolant system a flush. Any recommended products? I don't want to be removing the radiator as I've got too much to do but wanderd if anyone's used the coolant flush chemicals and the results?

TIA

[Lazydocker]

19 views and no-one has commented? I'm amazed... Surely someone has got an opinion?

[Kevin Wood]

Products from Forte and Wynn's appear to be spoken highly of, but no personal experience of either.

Kevin

[unlucky mark mv6]

Try the sentinal mate,what they use to flush out central heating systems.

[alank46]

Hi Paul
Wynns Radiator Flush has a good reputation, but I've not used it myself so cannot give a personal recommendation.
My heater has been inefficient for ages so I am going to try the Wynns when I finally get round to it.
Alan

[Lazydocker]

That's more like it! I was after other peoples experiences and what people have heard. I've heard good things about Wynns too

[Lizzie_Zoom]

I must admit that in all my years of working on my cars I have never used any chemicals to flush out the system.  I have just usually removed the radiator and forced water through it at high pressure, as I have the rest of the system by the use of a hose.  This I have found has removed all the muck, judging by what has come out.

There is no reason you cannot use my simple system with the radiator still in place if you want,  with the bottom hose disconnected and extra time given to the flush out.

[Phil.d]

I've actually got truck wash in at the moment after the oil cooler went on me I was told to run it for a week to help clear any gunge left after initial flushing. Its certainly doing the job and will soon drain and fill as normal.

[Dazzler]

Best thing to do is back flush with a hose pipe and keep going till all clean.

[Jimbob]

I've used forte bio degreaser, not specifically a flush, but certainly brought out some crap water alone did not (this car had previously had an oil cooler failure, by previous owner,  so some oilly crap expected)

[ScottieMV6]

Traffic film remover from Machine Mart as per whoever wrote the oil cooler How 2 on here.

Seems to work quite well and reasonably cheap compared with the likes of Forte.

[humbucker]

forte biodegreaser is unbelievably good. a proper flush will need doing over the period of a few days; drop coolant, fill water, get up to temp, drop coolant, fill water, basically do this til clean, then use the forte stuff and run the car with that in for a bit, then drop, fill water, run, then more forte, and so on until you end up with perfectly clear liquid/water without any bits in. then when forte is used up repeat the process but start putting in coolant and eventually the pink will be the right colour (tip: if the engine is producing clear water when draining then put in a strong mix of coolant, maybe even neat, as the v6 lump holds about 50% of the coolant in the system if using just the rad drain plug, so you'd end up with rough 50 50 mix this way. of course, you'll be draining it again shortly afterwards after it's been running anyway so not much chance of doing any damage).

forte biodegreaser can be difficult to find in the stores so fleabay is a good bet.

[Kevin Wood]

It all depends on the nature of the contamination too. Bio degreaser, TFR, etc is fine if a previous oil cooler failure caused the problem, but it's specifically designed for that type of contamination.

How well will it work with scale, corrosion and sludge  from, perhaps, a history of neglected coolant changes?  :-/

In that instance a more general purpose flush might well work better.

Kevin

[Spearmint]

Just done this, I used Fernox which is what is used on home central heating systems.

Mixed with boiling water, left it in the rad overnight then back flushed it till it all ran clear.

[Andy B]

It wasn't that long after I flushed my coolant system out with a LITTLE bit of caustic that I ended up with a small hole in my rad. Trouble is I found out I had a hole (somewhere :-?) after I'd driven to Dereks part of the world with a caravan! :-? :-?