petehall12 Posted yesterday at 12:04 AM Share Posted yesterday at 12:04 AM I read on here that those bolts go into the push rod galley. Trying to figure out how to fix it and is it worth paying for the high dollar stainless studs or not? Quote Link to comment https://www.bigmacktrucks.com/topic/74816-oil-leaking-from-my-bottom-manifold-bolts-e7-ami370/ Share on other sites More sharing options...
Joey Mack Posted yesterday at 12:15 AM Share Posted yesterday at 12:15 AM Pete, S.S. is a soft metal. PAI has decent studs for sale. What have you done to stop the leaks up til now? Yes the lower studs go into the push rod bore, and you can hit the push rods if you dont understand the set up.. Can you elaborate a bit more? jojo Quote Link to comment https://www.bigmacktrucks.com/topic/74816-oil-leaking-from-my-bottom-manifold-bolts-e7-ami370/#findComment-563115 Share on other sites More sharing options...
petehall12 Posted yesterday at 12:44 AM Author Share Posted yesterday at 12:44 AM 25 minutes ago, Joey Mack said: Pete, S.S. is a soft metal. PAI has decent studs for sale. What have you done to stop the leaks up til now? Yes the lower studs go into the push rod bore, and you can hit the push rods if you dont understand the set up.. Can you elaborate a bit more? jojo I haven’t done anything to stop it they have been leaking since I have owned the truck the last 3 years. Was just trying to figure out how to fix it. Yeah the steel ones pai make are like $12 but Mack wants $50 a piece for the S. S. Ones. Quote Link to comment https://www.bigmacktrucks.com/topic/74816-oil-leaking-from-my-bottom-manifold-bolts-e7-ami370/#findComment-563119 Share on other sites More sharing options...
Joey Mack Posted yesterday at 12:52 AM Share Posted yesterday at 12:52 AM are the gaskets leaking exhaust? if not, you can try to re-seal the lower studs. remove them and clean the threads, then put High temp RTV on them and re-install.. It's a slippery slope but, you can try it. Hopefully the nuts come off, or remove the nuts when the studs are out. They are m12x 1.75 thread, flange nuts.. the final torque is 100lbft, in 3 rounds, 25lbft, then 50lbft, then 100lbft.. I have had some luck doing this without removing the manifold and doing all 12, but like I said, slipery slope.. and hopefully the gaskets dont spring a leak.. one bad gaskets means the whole thing comes off.. oh,, the depth of the stud is about 3/4''... 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74816-oil-leaking-from-my-bottom-manifold-bolts-e7-ami370/#findComment-563120 Share on other sites More sharing options...
petehall12 Posted yesterday at 01:21 AM Author Share Posted yesterday at 01:21 AM (edited) 42 minutes ago, Joey Mack said: are the gaskets leaking exhaust? if not, you can try to re-seal the lower studs. remove them and clean the threads, then put High temp RTV on them and re-install.. It's a slippery slope but, you can try it. Hopefully the nuts come off, or remove the nuts when the studs are out. They are m12x 1.75 thread, flange nuts.. the final torque is 100lbft, in 3 rounds, 25lbft, then 50lbft, then 100lbft.. I have had some luck doing this without removing the manifold and doing all 12, but like I said, slipery slope.. and hopefully the gaskets dont spring a leak.. one bad gaskets means the whole thing comes off.. oh,, the depth of the stud is about 3/4''... No the gaskets are currently not Ieaking. I will try that Joey as always I appreciate it. And I will let you now how it goes Edited yesterday at 01:35 AM by petehall12 Quote Link to comment https://www.bigmacktrucks.com/topic/74816-oil-leaking-from-my-bottom-manifold-bolts-e7-ami370/#findComment-563129 Share on other sites More sharing options...
The Heinz Posted 18 hours ago Share Posted 18 hours ago I'd go with the PAI studs, there's no reason to let Mack bend you over unless you really want the SS studs. I have customers that had good success with the PAI ones. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74816-oil-leaking-from-my-bottom-manifold-bolts-e7-ami370/#findComment-563154 Share on other sites More sharing options...
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