i am on my second sierra coolant flush in prep for the evans, I am draining the radiator, engine block, and sucking out any i can get from the overflow tank and AST.... am I good here, or do I need to get the stuff out of the heater core?

I did a search already and it seems like after a run with 100% sierra, then flushing out what I mentioned above, you are good to go with evans......any other tricks to get it as empty of sierra as possible?

 

Evans is a propylene glycol, not a glycerine glycol like most coolants. I'm not sure what sierra is but it is easy to flush your heater core, just make sure to turn your heater temperature control to high ( I believe this opens a valve, not sure, read it somewhere) and put in some compressed air (not too much pressure, only need about 15-20 pounds) For the price of the Evans I would want to make sure I had 99-100% of any other contaminants out of the system (even water is considered a contaminant)

Frank

 

ok, look. Turn your heater on for about 10 min. with the sierra in your system. actually the sierra wont contaminate the evans, just flush it a second time to make sure the sierra got all of the water out, just make sure heater's on full blast. Once the second flush is complete, then put in your evans. The sierra is just to take out the excess water/coolant that's left over out of the system, it actually "soaks" it up. And sierra that's left over from the second flushing of your coolant system is ok because it's actually compatible in a sense with evans, just not a lot of it is. Hope that helped out some and good luck, let me know how it turned out!

 

What I implied here was to disconnect the heater hoses and apply pressure to one of them, while they are disconnected from the motor. After re-reading this I could see this may confuse some

Frank

 

thanks for the info frank...sierra is the evans freindly coolant that you can use to flush all the water based coolant outa there

 

thanks rx7spiritR, good info, i have already done what you suggeted, twice for good measure :-)

so I really should have no old coolant-water inthere anymore, just residual sierra....

evans goin in later today :-)

 

I think I meant Ethylene Glycol, not Glycerine Glycol (I shouldn't post after coming home form billiards league)


Frank

 

lol :-) I know what u ment :-)

 

I'm a bit confused here... Sierra coolant is propylene glycol: http://www.peakantifreeze.com/sierra.html

Evans coolant is propylene glycol: http://www.dieselsitetoo.com/product...207&1=220&3=42

Evans is what, 5 times as expensive as Sierra? With Sierra you are supposed to use a 50/50 H2O mix, but Evans is non-aqueous...

What's the difference here?

 

goto their site and read:
http://www.evanscooling.com/main31.htm

 

Interesting. They are both propylene glycol. The only difference seems to be that Evans contains additives to reduce the viscosity and increase thermal conductivity of pure propylene glycol.

 

yeah, its pretty intetresting stuff.... I like the reduction of 'hot-spots' properties

 

yeah, its pretty intetresting stuff.... I like the reduction of 'hot-spots' properties...and the fact that you can run it with zero pressure....and it still has a much higher boiling point