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Re: [GMCnet] Waterless Engine Coolant [message #327606 is a reply to message #327601] Sat, 30 December 2017 16:22 Go to previous messageGo to previous message
Matt Colie is currently offline  Matt Colie   United States
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
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Senior Member
Mark,

Your points are well supported, and I have known many that ran straight E-glycol in engines without issue.
And in your case in Texas, (One of the reasons I ask for a location in sigfiles) it will probably be successful. The big three up here all tried it. I know, because as the aftermarket guy for McCord Gasket, I was suddenly tossed a smoking hand-grenade that was this issue. We have no idea what our material compatibility was with straight glycols both E and P.

After an initial panic, I found we had a very low risk. When GM came to ask because they were thinking of recommending this for the Corvette, I was able to supply the GM account engineer with my data. He was much relieved.

In my searches, I did run into the Rotax issue, and further digging did confirm that the engines were expected to run at higher head temperatures with this coolant. What one also has to remember about aircraft engines is that they are relatively low specific horsepower.

We could not test this in our own labs at McCord because they were specialized for thermal cycle testing and used an open system. I had to some fast footwork to get data that we needed. It was an "adventure" to be remembered.

I still do not have the technical data about Evans that I would like. They do not ever mention a water pump seal lubricant and that sort of worries me. While no glycol will be an electrolyte and hence not be party to any internal corrosion, without this function, I might have some concern.

In Michigan (where fender solvent is applied to the roads on a regular basis), one is as likely to loose a radiator or condenser to external corrosion. (Right Nick?) In that case, loosing a $200+ coolant fill is less attractive.

I am going to stick with a known issue with the engine work I am doing this winter.

Matt


Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit

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