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International Automotive Technicians Network
Re: CAT C7 EXCESSIVE BLOWBY
Posted to HD/Fleet Forum on 9/24/2020

Carey, Cat had a system of oil recovery from the road draft it used filter # 267-9558 and a bypass filter head that let the fumes continue but not the oil the bottom of the filter has an atattchment for a hose to return oil to the block. Login to read more.