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Re: Detroit Compression in coolant
Posted to HD/Fleet Forum on 10/21/2020 1 Reply

A 1998 60 series should be DDEC 4 or maybe a DDEC 3, pretty sure head has to come off to do the cups on that vintage. DDEC5 can be done with out removing the head.

By bypassing the heater should eliminate the possibility of an air operated shut off valve lea... Login to read more.

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