mclow Posted June 3, 2013 Share Posted June 3, 2013 Well my truck started knocking under load the other day. I have narrowed it down to the number 4 cylinder. According to the tag on the valve cover it was remacked in 06. My question is should I go back with original mack parts or go with a cheaper aftermarket rebuild kit like clevite or something? What is your guys' opinion and where is a good place to aquire these kits? thanks for any imput Quote Link to comment https://www.bigmacktrucks.com/topic/31415-em7-300-knocking-under-load/ Share on other sites More sharing options...
e9500v8 Posted June 3, 2013 Share Posted June 3, 2013 I had an E-6 knocking under a load and all it was ,was a head stud broken off. PAI kits are good if you want to go cheaper. Quote Link to comment https://www.bigmacktrucks.com/topic/31415-em7-300-knocking-under-load/#findComment-186615 Share on other sites More sharing options...
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