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Old 09-06-2013, 06:03 PM   #1 (permalink)
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Default coolant conditioner and headgasket material

A brief internet search shows that the coolant conditioner subaru recommends is designed to attach to he headgasket material. If I've replaced my headgasket with an MLS Felpro headgasket set, is this coolant conditioner still recommended or even useful? I had my heads resurfaced and these new MLS gaskets are not leaking as of yet, been running with water and radiator flush for a couple hours now, wondering if I need to add this stuff when refilling with proper coolant or not?
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Old 09-06-2013, 08:07 PM   #2 (permalink)
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At 2.50 a bottle, it won't hurt anything.
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Old 09-06-2013, 08:23 PM   #3 (permalink)
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Originally Posted by cardoc View Post
At 2.50 a bottle, it won't hurt anything.
That's all I was concerned about, because I was told it can hurt--that is it just re-branded rad-weld, and can cause damage/obstructions. I already have the bottle laying around, just didn't want to throw it in there if it had nowhere to go(with different material not attracting the gunking substance) and thus cause blockage.
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Old 09-06-2013, 10:38 PM   #4 (permalink)
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It won't cause blockage with the MLS gaskets any more than it did with the original. The Subaru conditioner does not harden in the cooling system and flushes out.
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