antifreeze?

[Stu Jackson]

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Also I'd drain all of the old antifreeze (blow out the lines) to get all of it out, then flush and refill with 50% mix Prestone.  Then you'll start fresh and know what's in the cooling system.

And while you're at it, don't forget the hoses from the engine to the heater, Critical Upgrades:

http://c34.org/bbs/index.php/topic,5078.msg31079.html#msg31079