MEP803 thermostat replacement and proper coolant

[toypar]

I have a Mep803 that will not get over 140. I am preparing to replace the thermostat this weekend. What is a safe long life coolant for these units? Do they have brass/soldered radiators?
if anyone has done research on coolant, it will make your head spin as much as researching oils.
I want to make sure to use a coolant that will protect the brass/solder (of this set has that) right away as opposed to a Dexcool or OAT type coolant that takes many hours to start protecting metals.

thank you

 

[Ray70]

I'm sure everyone has their own opinion on antifreeze..... and there are high performance antifreeze solutions available, but for me good old Green Prestone has always treated me well. It's available everywhere and priced reasonably.

And yes, your 803's radiator is soldered brass.
I wouldn't go anywhere near Dexcool for anything. I've see way too many GM's with mud in the radiator!

 

[toypar]

I'm sure everyone has their own opinion on antifreeze..... and there are high performance antifreeze solutions available, but for me good old Green Prestone has always treated me well. It's available everywhere and priced reasonably.

And yes, your 803's radiator is soldered brass.
I wouldn't go anywhere near Dexcool for anything. I've see way too many GM's with mud in the radiator!

I am staying away from dexcool for sure. I see lots of people run Rotella ELC and that is an OAT coolant like dexcool. So it must have extra additives for brass and solder?

 

[Light in the Dark]

Prestone Green is good and cheap.

 

[NATCAD]

Remember to boil your t-stat before you install it, make sure it opens as should. I've just had huge temp problems, and so far it seemed to be fuel related ,but I am still in progress to confirm that.