Most important to completely flush the cooling system - use a detergent like Tide + water. Any oil remnant in the cooling system will rapidly deteriorate the hoses, which should all be replaced after gasket replacement & enough flushes that no more brown scum appears the next day.
Steve
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'91 MB 190E 2.3
'08 RAV4 Ltd 3.5
'83 Lazy Daze m'home 5.7
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