2wdiesel2021 Posted December 15, 2025 Share Posted December 15, 2025 We took the head off a Mack MP8, didn’t think to put it on 1 TDC. Putting it back together and went to put it on 1TDC and can’t find a mark anywhere on the flywheel. Cam marks are all there. Where exactly is this mark or is there another way to find TDC accurately? Quote Link to comment https://www.bigmacktrucks.com/topic/76237-2008-mack-mp8-engine-timing/ Share on other sites More sharing options...
Joey Mack Posted December 16, 2025 Share Posted December 16, 2025 There is a mark on the flywheel, then you set the cam in place on 1, then the cam gear, using the silly A-B rod thingy. Theres more to it, but i havent done one in about 8 years.. you can re-set it. Dont try to run it til its right.. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76237-2008-mack-mp8-engine-timing/#findComment-587202 Share on other sites More sharing options...
2wdiesel2021 Posted December 16, 2025 Author Share Posted December 16, 2025 Where is this mark on the flywheel? I spun it around and can’t find it? Looked in the hole above the starter and the one in the bottom of the housing as well. Quote Link to comment https://www.bigmacktrucks.com/topic/76237-2008-mack-mp8-engine-timing/#findComment-587204 Share on other sites More sharing options...
Joey Mack Posted December 16, 2025 Share Posted December 16, 2025 Look up through the hole at 6 oclock. There is only 1 mark. I think its Zero. Its been a while Quote Link to comment https://www.bigmacktrucks.com/topic/76237-2008-mack-mp8-engine-timing/#findComment-587206 Share on other sites More sharing options...
2wdiesel2021 Posted December 16, 2025 Author Share Posted December 16, 2025 Spun it around and around and never found anything. Quote Link to comment https://www.bigmacktrucks.com/topic/76237-2008-mack-mp8-engine-timing/#findComment-587213 Share on other sites More sharing options...
Joey Mack Posted December 16, 2025 Share Posted December 16, 2025 Sorry, bud.... im at a loss.. any chance you have number 1 injector out ? Quote Link to comment https://www.bigmacktrucks.com/topic/76237-2008-mack-mp8-engine-timing/#findComment-587214 Share on other sites More sharing options...
2wdiesel2021 Posted December 16, 2025 Author Share Posted December 16, 2025 No, but we can absolutely pull it out and get it to TDC1 Quote Link to comment https://www.bigmacktrucks.com/topic/76237-2008-mack-mp8-engine-timing/#findComment-587221 Share on other sites More sharing options...
Joey Mack Posted December 16, 2025 Share Posted December 16, 2025 Look at the flywheel if you do that. You may need emeory cloth to uncover the timing mark, that i beleive is a 'zero'... i wish my memory was stronger on this one. Quote Link to comment https://www.bigmacktrucks.com/topic/76237-2008-mack-mp8-engine-timing/#findComment-587227 Share on other sites More sharing options...
fjh Posted December 16, 2025 Share Posted December 16, 2025 13 hours ago, Joey Mack said: There is a mark on the flywheel, then you set the cam in place on 1, then the cam gear, using the silly A-B rod thingy. Theres more to it, but i havent done one in about 8 years.. you can re-set it. Dont try to run it til its right.. That hokey rod thing was dumbass ! Too bad it was so much effort for Volvo to mark the gears! Just another " Special tool" for them to gouge the dealer for! They simply could have picked a flat surface on the head had a mark that lined up on the gear when the flywheel was on DTC Mark! Another Tax grab By Volvo! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76237-2008-mack-mp8-engine-timing/#findComment-587233 Share on other sites More sharing options...
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