mcratchet1 Posted February 10, 2021 Share Posted February 10, 2021 Ok main belt was worn time to change grab tensioner was loose tried to tighten nope bolt pulled out with a heli coil around it sob! My question obviously owners before me fixed it with coil. Don’t know why it failed can I do the same or does some know a better repair ? It’s In the aluminum front cover tensioner #21291243 or is only right way to replace entire front cover thanks for any help Quote Link to comment Share on other sites More sharing options...
Vmac3 Posted February 10, 2021 Share Posted February 10, 2021 Oh geez, Are the threads in the timing cover that accommodated the heli-coil in good shape? If it is find out what the thread pitch is and see if a new bolt will fit in the bolt hole without any slack. If it is in good shape, I was wondering if you could drill out the belt tensioner so the new bolt will fit in the tensioner without any issues. You would probably need to use a bolt that has a allan head. One option is to fill the bolt hole with a plug weld and re-drill and tap a new hole. Another option would be replacing the timing cover. I would be more inclined to try a larger bolt and drill out the tensioner if possible. Maybe someone else can chime in on this. F or Joey would have some good suggestions. V 1 Quote Link to comment Share on other sites More sharing options...
Popular Post doubleclutchinweasel Posted February 10, 2021 Popular Post Share Posted February 10, 2021 (edited) 1. Replace Heli-Coil in existing hole if hole is good. Easiest to try. 2. Instead of Heli-Coil, look into a "Threaded Insert". Takes a larger hole than a Heli-Coil, but can be considerably stronger. There are several different styles. Plain. Loctited. And, staked. I have seen these use a "standard" tap of a larger size for the hole. But, most I have used require a special tap, similar to the way a Heli-Coil tap works. Incidentally, I have seen aluminum (and even steel) parts come from the factory with Heli-Coils already in them. Edited February 10, 2021 by doubleclutchinweasel 2 1 Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment Share on other sites More sharing options...
mcratchet1 Posted February 10, 2021 Author Share Posted February 10, 2021 Ok thanks, the hole was tapped to fit a heli coil I put one in last night but the bolt for tensioner does not seem to get real tight so I’m worried to death it going to come out. I did not know I could drill a hole bigger in tensioner that might be a great idea heli coil is a 10.5 but od is bigger of course the threaded insert sound better I will try to order some just was wondering if they will last or just do the dang cover thanks for your guys professional help I really appreciate it Quote Link to comment Share on other sites More sharing options...
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