seanross Posted December 5, 2014 Share Posted December 5, 2014 (edited) hi guys. need some help setting the valves on my mack. the engine has ENDT 676 stamped on it. its a 2vh with dynatard, I have the valve set procedure in front of me. it says in the book I have, to set each cylinder 30 degrees passed tdc. it also states that there is a pointer located on the block marked "valve" that lines up to marks on the damper. There is no pointer on the front of my engine. so i went to the scrap yard to find one. but there were no pointers on those engines either. there is however, a pointer on the very bottom of the flywheel housing. but I cant make sense of the markings on flywheel. all i can see on flywheel is a series of holes. do these mean something? or just for balancing purpose? any help would be appreciated. thanks! Edited December 5, 2014 by seanross Quote Link to comment https://www.bigmacktrucks.com/topic/37983-valve-adjustment-on-676-finding-tdc/ Share on other sites More sharing options...
theakerstwo Posted December 5, 2014 Share Posted December 5, 2014 On the engine with the timing marks at the bottom of the flywheel there should be a mark in the center of the housing and the flywheel will have a set of marks in degrees on it with tdc at the beginning and it should have 1/6 marked on it. The turn wheel some more to 2/5 and then 3/4 marks on the wheel.This engine could be mismatched with parts.it happens. 1 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/37983-valve-adjustment-on-676-finding-tdc/#findComment-269216 Share on other sites More sharing options...
seanross Posted December 5, 2014 Author Share Posted December 5, 2014 I have those marks on my vibration damper. but nothing like that on the flywheel. Quote Link to comment https://www.bigmacktrucks.com/topic/37983-valve-adjustment-on-676-finding-tdc/#findComment-269217 Share on other sites More sharing options...
thomastractorsvc Posted December 6, 2014 Share Posted December 6, 2014 Not sure what book you are using but this is from the Mack Service ManualIf you read it will show you where the pointer should be and where to put one and how to mark the balancer. Quote Robert"I reject your reality and substitute my own." Link to comment https://www.bigmacktrucks.com/topic/37983-valve-adjustment-on-676-finding-tdc/#findComment-269283 Share on other sites More sharing options...
theakerstwo Posted December 6, 2014 Share Posted December 6, 2014 The engine that uses the pointer on the front with the marks on the damper will have the pointer spot welded to the front cover so if there is no pointer there the marks may be on the flywheel. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/37983-valve-adjustment-on-676-finding-tdc/#findComment-269313 Share on other sites More sharing options...
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