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Re: [GMCnet] Waterless Engine Coolant [message #327575 is a reply to message #327555] Fri, 29 December 2017 15:12 Go to previous messageGo to previous message
TR 1 is currently offline  TR 1   United States
Messages: 348
Registered: August 2015
Location: DFW
Karma:
Senior Member
Have this in several of my cars. Including an RX7 I regularly take to the track. That car has had the same coolant in it since 2002. Car still does fine at track days in Texas summer heat. Looking inside the water pump housing, it still looks brand new in there. No corrosion whatsoever. This is not uncommon. You can do a search for engine tear down pics after running Non-aqueous coolant. No water equals no corrosion.

As mentioned earlier, it's pricey, so I only use it in vehicles I plan to have for some time... especially on vehicles that see high cooling loads. Turbo motors, rotaries... I also use it in my 05 ford excursion diesel, as that engine is known for having water jacket erosion issues due to coolant cavitation.

Plan to switch the GMC over when I switch to an aluminum radiator in the next year or so. Yes, u can run it at zero pressure, or with a low pressure cap if u desire. Yes, it does not absorb as much heat as water. However, in a properly sized cooling system, it should cool better than water in a lot of situations:

A non-overheating engine can still have pockets of boiling when under high load. This can cause hot spots, cavitation damage (water vapor bubbles form then collapse violently causing erosion of the water jacket) and water vapor acts as an insulator, preventing heat transfer. The high boiling point of non-aqueous coolant provides a higher margins against this than conventional coolant.

Corrosion acts as an insulator. No water means clean water jackets and radiators.

Running low or zero pressure means less stress on cooling system hoses, radiators, etc. Also, if a hose or whatever does fail, the leak is very small. Not catastrophic like a hose or radiator bursting.

Yes it's pricey. But if u change your coolant every 2 years, or even every 5, it will pay for itself if you keep the vehicle for some time.

Mark S. '73 Painted Desert, Manny 1 Ton Front End, Howell Injection, Leigh Harrison 4bag and Rear Brakes, Fort Worth, TX

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