diggin dirt Posted July 13, 2010 Share Posted July 13, 2010 What is the head bolt torque reading for a endt 676, do i need to retorque after run in and are the head bolts reusable over and over. Quote Link to comment https://www.bigmacktrucks.com/topic/14790-676-head-bolt-torque/ Share on other sites More sharing options...
theakerstwo Posted July 13, 2010 Share Posted July 13, 2010 Torque to 220 and as for as using old bolts it is ok if not piited or stretched and i dont know the length but i always run the engine foe maybe 10000 miles and retorque. I do not know what mack says to do any more but some here are dealer techs and can say. But for years i have always torque it when hot and i back off each bolt one at atime then retorque and you can mark them and you will always gain it the torquing so i say the clamping is better after a retorque. I think the newer gaskets is a no torque but to me the clamping is a gain in doing so. Free advice again. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/14790-676-head-bolt-torque/#findComment-59412 Share on other sites More sharing options...
fjh Posted July 13, 2010 Share Posted July 13, 2010 Torque to 220 and as for as using old bolts it is ok if not piited or stretched and i dont know the length but i always run the engine foe maybe 10000 miles and retorque. I do not know what mack says to do any more but some here are dealer techs and can say. But for years i have always torque it when hot and i back off each bolt one at atime then retorque and you can mark them and you will always gain it the torquing so i say the clamping is better after a retorque. I think the newer gaskets is a no torque but to me the clamping is a gain in doing so. Free advice again.I wouldnt fuss over a retorque but Glenns schedule is a good one if you going to 10000 miles is a good number. Quote Link to comment https://www.bigmacktrucks.com/topic/14790-676-head-bolt-torque/#findComment-59415 Share on other sites More sharing options...
truckboy Posted July 14, 2010 Share Posted July 14, 2010 Does it pay to re-torque the head bolts. I guess what I'd do is slightly loosen each head bolt, then torque it to spec.Thoughts? Quote Mack trucks | Cheap used cars Link to comment https://www.bigmacktrucks.com/topic/14790-676-head-bolt-torque/#findComment-59516 Share on other sites More sharing options...
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