Any Tips on Flushing a Z06 cooling system

[Mako Koiwai]

GM specifies a specific replacement coolant ... what about adding some Redline Water Wetter ?

We've been getting into the mid 240 oil temperature. Bryan P. says that if you aren't getting into the 260's you aren't pushing it enough!

[Arthur Grant]

You can add water wetter to anything. Works great in my vette.

[Thomas Barrett]

I understand a Vette runs cooler with only water and water wetter than with coolant. Also if you ever spring a leak the clean up is a lot easier.

I never run coolant and no problems.

[Mako Koiwai]

Brian reminded me that he put in a 160 degree thermostat, but used GM specific coolant. We'll do a flush and fill with water and Water Wetter ... and clean the radiator. It was easy to put in a new Miata radiator ... I'll check our shop manual on removing the Z06 radiator for a thorough cleaning.

Any opinions on using regular tap water vs distilled water vs filtered water from my Brita water filter system?

[John Stimson]

Use distilled. The water in L.A. is very hard and will deposit lime in your cooling system (not conducive to flow or heat transfer). A Brita fiber & carbon filter won't remove the minerals from the water. If you have a reverse-osmosis filter then you could use that water.

[Bob Beamesderfer]

Absolutely use distilled water.