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Re: 2012 isb6.7 coolant leak proccedure
Posted to HD/Fleet Forum on 6/21/2018

I don't see many cummins. Have had MaxxForce DT's starting using coolant with no leaks. Some will run at high idle for a long time no smoke. Then the EGR valve opens, big cloud as coolant trapped in the cooler gets out. If leak isn't massive will clear quick. ... Login to read more.