Coolant Flush?

[B_K]

eb99603 (name?)
The whole system holds 22 gallons.
That is why I'd put 11 gallons of straight anti-freeze in it and top it off with water of your choosing.
Once you get the coolant in it get it up to temp and run the heater & defrost full blast for about 1/2 hr.

It's hard to do a complete flush on that system.
  BK 

[B_K]

BTW don't ferget to use the test strips to see if it's at acceptable levels or if you need to add additives!
  BK 

[RichardEntrekin]

I am sorry to complicate your life, but I didn't create this mess.

You do not know what coolant you had originally. It could be DD Powercool which is kind of reddish pink when diluted, or it could be one of the long life OAT based coolants which are usually red. I only bring this up because you mentioned using Final Charge.

The problem is that the SCA based coolants like Powercool do not play well at all with the OAT based coolants. Yes they are both ethylene glycol, but it's the additive package that counts.

Unless you have documentation of which type was in the coach, I would drain it and start with new. Record whether it is a SCA or OAT based system and always use that based coolant.

If you decide to use the OAT based coolant, remove the coolant filter and replace it with a "BLANK" filter. A "BLANK" is one that does not contain any SCA replacement.

Coolants are one confusing mess, since the arrival of OAT, and NOAT based coolants on the scene coupled with the fact that there is no agreement between the manufacturers on color to identify what you have, and no readily available test strip to identify either.

This isn't intended to be a total explanation of the coolant problem, so you might want to do some research before you decide what to do.

[dtcerrato]

If the bus is staying in an Alaska winter & not specifically in southern Alaska, a 50 - 50 mix will not be enough protection. 60 - 40 will work unless it's parked at the North slope...

[eagle19952]

If the bus is staying in an Alaska winter & not specifically in southern Alaska, a 50 - 50 mix will not be enough protection. 60 - 40 will work unless it's parked at the North slope...

we mixed/sold 62/38 at the North slope.

[eb99603]

It'll be parked on the Kenai Peninsula. Temps here are more mild than the MN winters I left (but still cold enough that I need to get the coolant addressed this weekend). Thanks for the input from everyone.

[bigred]

Napa has the precharged red antifreeze for 13.00 dollars a gal for the concentrate.Distilled water down here is under a dollar if you look in the right place .I guess where you are the prices are exponentially higher!!