Evans.

[mjheathcote]

Flammable ?!!
Don't like the sound of that!
Would like to know how flammable, like you say, a nice fine 'Evans' mist would be non too clever in the engine bay!

[mjheathcote]

Just googled this:

http://www.norosion.com/evanstest.htm

I think if I had Evans in my engine, after reading this I would get rid immediately!

SUMMARY OF FINDINGS


Conversion costs of $259 if you do it yourself, or over $400 if you pay a shop to do it.


97%+ removal of all previous coolant is mandatory in order to prevent corrosion.


Inhibitor deposition occurs on aluminum surfaces, which could cause issues in some radiators.


Engines run 115-140oF hotter (at the cylinder heads) with Evans products.


Stabilized coolant temps are increased by 31-48oF, versus straight water with No-Rosion.


Reprogramming ECU fan temp settings is mandatory to prevent the fan from running continuously.


Specific heat capacity of Evans waterless products ranges from 0.64 to 0.68, or about half that of water.


Engine octane requirement is increased by 5-7 numbers.


Computerized ignition must retard engine timing by 8-10o to prevent trace knock.


Engine horsepower is reduced by 4-5%.


Accelerated recession of non-hardened valve seats in older engines is possible, due to brinelling.


Viscosity is 3-4 times higher than what OEM water pumps are rated to accommodate.


Coolant flow rate through radiator tubes is reduced by 20-25% due to the higher viscosity.


Race tracks prohibit Evans products because they are flammable and slippery when spilled.

[martin]

I hesitate to say this because I really don't want to upset anybody, but this stuff looks more and more like snake oil ! Several lines in Mr Heathcote's post are alarming ! Martin.

[flying farmer]

I have just read through the link that Mike posted, and several things worry me, not least the viscosity and extra load it will put on the water pump which is rather prone to destroying the engine anyway. Not so much of a problem with the belt driven conversion perhaps.
The reference to the ex P51 merlin engine was significant as I believe WW2 liquid cooled engines ran on straight glycol. To try pressurising a cooling system sufficiently to prevent boiling at 25,000 ft if it was filled with water would require very heavy duty components and the aircraft performance would suffer as a result. Not much of a problem for the Stag, but the aircraft cooling system would be designed to use glycol from the outset, ie a larger radiator would be lighter than a high pressure cooling system and you can't hop out of your aircraft mid flight to top up the coolant when the pressure causes a leak (quite important when the enemy are trying to shoot you down, bullet holes are a sure way to produce a leak)!

Another fact that bothers me is the increase in cylinder head temperatures. This might not show up as an increase in coolant temperature due to the lower conductivity of the evans coolant, but I am sure I read somewhere that the LM25 alloy used for the Stag heads loses a significant amount of strength once heated over 125 degrees C.

That sounds very much like the temp needle tells you all is well while the heads are trying to cook themselves unseen.

I think I will stick to water based antifreeze!

Neil

[wilf]

Didn't we discuss all this before? I know I made the point about the absence of tell-tale warning signs of overheating with this coolant. On those grounds alone I wouldn't use it, but each to their own.

[mjheathcote]

The report will be biased slightly published by a competitor, and we all know how in the US they all like knocking each others products!
Even so, I do think they are valid points all the same.

[martin]

To be honest guys and gals, I'm hard pressed to find a difference between this and Evans, what do you think ? ........http://www.holden.co.uk/displayProdu...?pCode=080.861....... Martin.

[Stag therapy]

Looks to be similar stuff.

Happy to be corrected by more knowledgeable members, but if the operating temperature is raised, isn't this going to reduce oil pressure by making the oil less viscous, to perhaps a level below planned by the engine designers?

Baz

[GrantE]

i would have thought that most Stag owners keep a beady eye on the temp gauge and not waiting for the steam to come out of the engine bay? I've run Evans since national day to years ago, when they ut it in for me. No problems since at all and haven't had to drain the system and flush since. Obviously, don't know what it's like inside but will find out when have the heads off for some work. I'll report back!

[jagorstag]

A fellow Stag owner here in Ireland has used it for years, and has only positive things to say about Evans. Once his EWP failed (cable had come loose) resulting in the engine overheating, the temp gauge hit the roof and beyond! Later at home he took off the heads to inspect for damage, but no sign of any kind of damage could be found, so he put all back together again and has driven regularly for 3 or 4 years with the Stag and no issues to report.

I'll be using it when I eventually get my engine rebuilt.

Cheers,
Joakim

[Wholehogmog]

Watching Wheeler Dealers; Edd put Evans in a TR6 and said 'This car will never suffer with overheating again' Big statement. I'd love to think it was as simple as that

[KOY 23]

Welcome to the forum. He's probably paid to say that. Be very wary about using it in a Stag. Do a search.

[jagorstag]

Watching Wheeler Dealers; Edd put Evans in a TR6 and said 'This car will never suffer with overheating again' Big statement. I'd love to think it was as simple as that

Welcome to the forum! As with a lot of things there are plenty of opinions on either side of the argument, so do as John advices and do some research yourself and hopefully you can draw your own conclusions on the matter.

There doesn't seem to be any conclusive evidence for or against it, it probably isn't as fantastic as Evans claims but it probably also isn't as bad as some opponents want to make you believe. The truth is probably somewhere in between, as usual...

Cheers,
Joakim

[simonmetalback]

I've been using Evans in my Stag now for 3 years with no problems to report. Im sure if it was bad for my engine I would have found out by now, I've been sat in traffic 4 up in the middle of a very hot summer and no problems. That was with a standard rad and standard fan.
Do we have any cases where a Stag or any old or classic car engine has suffered as a result of using Evans coolant.
Owning a Stag don't you always keep one eye on the road and one on the Temp gauge.
I know it's costly but I would have spent it on something else for the Car.
Personal choice again I think.