Waterless coolant

Fans, radiators, heaters, e-fans, cooling issues, air conditioning...
Post Reply
ian65
Admin
Admin
Posts: 5909
Joined: Wed Mar 30, 2011 12:11 am
Has thanked: 84 times
Been thanked: 75 times

Waterless coolant

Post by ian65 » Mon May 19, 2014 6:14 pm

anyone used any of this or got any thoughts on it? :?
1986 Series 3 Elford Turbo
http://rx7fb.com/viewtopic.php?f=2&t=2400
New custodian of 'Gus', K plate series 3
1992 Peugeot 205 1.9 GTI
1975 Honda SL125 Street Scrambler

RamoNZ
VIP User
VIP User
Posts: 799
Joined: Wed Jul 13, 2011 3:56 pm
Location: Auckland, New Zealand
Has thanked: 0
Been thanked: 1 time

Re: Waterless coolant

Post by RamoNZ » Mon May 19, 2014 9:50 pm

I've looked into it but only gleaned Internet knowledge.

Cooling system has to be completely water free which might be harder to do than say, no need for a pressure cap is an interesting side effect but cost is very high and you need to carry lots of spare litres with you in case somehow you loose your coolant - no topping up with water to get you home.

Upside is it lasts forever so costs are outweighed as long as it stays in the engine!
1980 Series 1, Minty Pea Green 13b Turbo

ian65
Admin
Admin
Posts: 5909
Joined: Wed Mar 30, 2011 12:11 am
Has thanked: 84 times
Been thanked: 75 times

Re: Waterless coolant

Post by ian65 » Tue May 20, 2014 9:42 am

ah.... interesting thanks..... tbh, sounds like more trouble than it's worth.
1986 Series 3 Elford Turbo
http://rx7fb.com/viewtopic.php?f=2&t=2400
New custodian of 'Gus', K plate series 3
1992 Peugeot 205 1.9 GTI
1975 Honda SL125 Street Scrambler

RamoNZ
VIP User
VIP User
Posts: 799
Joined: Wed Jul 13, 2011 3:56 pm
Location: Auckland, New Zealand
Has thanked: 0
Been thanked: 1 time

Re: Waterless coolant

Post by RamoNZ » Tue May 20, 2014 5:59 pm

You sparked my curiosity by bringing this up - I have only ever read up about it with a Piston engine in mind and the hassle of having a specific cooling medium that costs £150 to fill the engine - including prep fluid and some spare to top off in the event of a leak or engine work requiring some spillage.

However, there is one factor that would certainly benefit a rotary, and that is the reduction of pressure in the cooling system. The waterless stuff boils at 180 so running around even 100 degrees puts no pressure on the seals or radiator hoses or gaskets etc.. Theoretically, if it didn't leak stone cold, it wouldn't leak hot - I'm sure we've all seen a leak that only comes on once the pressure builds. it would certainly help if the waterseals were getting a bit tired on the cold side of the engine (obvs on the hot the combustion pressure would overcome weak seals easy enough).

Regarding cost - if it costs £20 or so every 2 years then the payback period is rather long, so that wouldn't be a reason to do it, and if you did venture there, you'd want to block off any sources of possible leakage like the inlet manifold and allow inlet removal without coolant loss - I suspect that the orings would last a fair while longer if not subject to any pressure though....

Food for thought?
1980 Series 1, Minty Pea Green 13b Turbo

Lucky
VIP User
VIP User
Posts: 2686
Joined: Mon Nov 07, 2011 8:30 pm
Location: Worthing, UK
Has thanked: 0
Been thanked: 0

Re: Waterless coolant

Post by Lucky » Tue May 20, 2014 6:13 pm

You already isolated the main concern for me, dude, which is; what do you do if you get a leak and have to top-up? Either carry a load of waterless stuff with you all the time, or call a low-loader. Not ideal.

Plus, how safe is it on rotary engine water seals? I bet the company's never paid for R&D on rotaries. Given the number of FDs that used to be imported having spent a couple of years on various docks and boats, then blew their water seals with in a week of use... the coolant would pool at the bottom of the engines and then they'd leak as soon as they were put under stress. Although I've never been 100% whether that's degradation to the seals or corrosion to the housing or both. Still, I'd like to see a water seal immersed in Evans waterless stuff for, like, six months without it turning into silly putty to set my mind at rest!

User avatar
gt_james
VIP User
VIP User
Posts: 653
Joined: Sun Apr 06, 2014 4:10 pm
Location: Pershore, Worcester UK
Has thanked: 0
Been thanked: 3 times

Re: Waterless coolant

Post by gt_james » Fri Apr 26, 2019 11:53 am

evans, its just propylene or ethylene glycol.

Its flammable, slippery as, and does not transmit heat well.
It is good for keeping out corrosion, but s**t as a coolant.

As its also flammable, meaning if your car sprung a coolant leak its entirely possible the whole machine could light up. An obvious reason would be a holed radiator dripping on to the headers.

It's banned in most motorsport as its so dangerous.

Post Reply

Return to “Cooling”