Evans NPG+ Low Pressure coolant system? - The Unofficial BMW M5 Messageboard (m5board.com)

Carzzi · 9th July 2006, 17:55

There's a company out there called Evans Cooling Systems that sells a non-aqueous propylene glycol coolant that runs at very low pressures.

See http://www.evanscooling.com/main25.htm

Since the system runs at 0 psi over atmospheric, compared to the 15psi over atmospheric that conventional pressurized water-glycol systems do, there should be less mechnical stress placed on the coolant hoses, radiator, etc.

Also, since it runs at 0psi, a small leak would not have the catastrophic overheating effect that it does on a conventional system.

Has anyone here tried this on an M5?

RUFM5 · 22nd December 2008, 00:56

Quote:

Originally Posted by Carzzi

There's a company out there called Evans Cooling Systems that sells a non-aqueous propylene glycol coolant that runs at very low pressures.

See Evans Cooling Systems, Inc. High Performance Engine Cooling and Power Production.

Since the system runs at 0 psi over atmospheric, compared to the 15psi over atmospheric that conventional pressurized water-glycol systems do, there should be less mechnical stress placed on the coolant hoses, radiator, etc.

Also, since it runs at 0psi, a small leak would not have the catastrophic overheating effect that it does on a conventional system.

Has anyone here tried this on an M5?

I am going to try this Evans coolant on my next flush. Has anyone else tried it?