[C38] Fwd: Red or Green Engine Coolant?

[Max soto]

Peter Lagan wasn't able to post on the Listserve, so here's his email: 

> Which engine coolant should our 5424 engines use...Green or Red? Is one Ethylene and the other Propylene (Dex)?
> 
> I'm in the process of re-plumbing the Hot Water Tank to be heated from engine coolant instead of the hydronic Espar heater. When breaking into the coolant lines, I collected a bucket of red coolant. A few years ago when I replaced the water pump, I mixed green with the red. Now that I read about it, these two should probably not be mixed. The more I read, the more confused I get.
> 
> I'm guessing that best practice would be to flush out all of the red (should I remove the thermostat to do this?), and replace with green. Perhaps higher silicates in red help against corrosion protection for any aluminium parts? Any thoughts?
> 
> Thanks in advance,
> Peter
> Gusto #333

Peter, I haven't studied coolant carefully.. I have just been using the one that says "FOR DIESEL ENGINES" (red) without anymore thoughts...  It will be interesting to learn a little bit about it! Looking forward to Tom's  comment here!
Regards, Max 

Begin forwarded message:

> From: Peter Lagan <plagan at shaw.ca>
> Date: January 29, 2013, 3:55:05 PM CST
> To: maxsoto at gmail.com
> Subject: Fwd: Red or Green Engine Coolant?
> 
> Hey Max,
> 
> Just wondering if this came through...I still can't post on the Listserve. Any ideas on coolant?
> 
> Thanks,
> Peter.
> 
> ----- Forwarded Message -----
> From: "Peter Lagan" <plagan at shaw.ca>
> To: "Catalina 38 Listserve" <listserve at catalina38.org>
> Sent: Tuesday, 29 January, 2013 10:13:00 AM
> Subject: Red or Green Engine Coolant?
> 
> Which engine coolant should our 5424 engines use...Green or Red? Is one Ethylene and the other Propylene (Dex)?
> 
> I'm in the process of re-plumbing the Hot Water Tank to be heated from engine coolant instead of the hydronic Espar heater. When breaking into the coolant lines, I collected a bucket of red coolant. A few years ago when I replaced the water pump, I mixed green with the red. Now that I read about it, these two should probably not be mixed. The more I read, the more confused I get.
> 
> I'm guessing that best practice would be to flush out all of the red (should I remove the thermostat to do this?), and replace with green. Perhaps higher silicates in red help against corrosion protection for any aluminium parts? Any thoughts?
> 
> Thanks in advance,
> Peter
> Gusto #333
> 
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