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Discussion Starter · #1 ·
Has anyone ever done a cooling system flush on the 3.6L JK? I am talking the old-school cut the hose and install a garden hose, open the valve flush...if that's possible.

I want to get my radiator as clean as possible as it appears there is sediment, (sand?) and I just want to flush it after 60K miles.

Thanks,
Mike
 

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Not on a JKU but just did this on on my '96 impalaSS with the LT1. Took the knock sensors off and ran the garden hose thru the upper rad hose till the water came out crystal clear. Put the sensors back in, ran it up to temp, rinse and repeat and you would not believe how much more fouled water came out. Did it quite a few times before it finally cleared.
 
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