5.7 Exhaust Manifold Bolts
#1
03-13-2018, 05:20 PM
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5.7 Exhaust Manifold Bolts
I have recently purchased a 2012 Dodge Durango Crew AWD 5.7 and have noticed a light engine ping during startup that slowly quiets when warm. I have done research and found that common issue is exhaust manifold bolts have cracked. I have priced it out totally makes sense to do it myself. Looking for guideance what is the most efficient way in accessing the bolts? I am fully aware that I may have to do drill and easy-out the cracked bolts.
#2
03-13-2018, 09:01 PM
don't drill or use extractors...have seen more head damage using this method.
I do this repair monthly...mig weld a nut onto the broken stud and turn the nut out with a wrench. if the stud is below the surface of the head, put a few tacks on it to build it up, place the nut over the hole and weld thru the hole in the nut to bring the stud and nut together.
measure the warpage of the manifold...if its exceeds 0.008" per foot, consider machining it or replacing.
shops charge 1.5 hours per side for the manifold plus extraction time...usually another 0.5 per side depending on how many bolts are broken.
if the bolts aren't broken...try a different fuel supplier or go up an octane and see if the problem changes.
I do this repair monthly...mig weld a nut onto the broken stud and turn the nut out with a wrench. if the stud is below the surface of the head, put a few tacks on it to build it up, place the nut over the hole and weld thru the hole in the nut to bring the stud and nut together.
measure the warpage of the manifold...if its exceeds 0.008" per foot, consider machining it or replacing.
shops charge 1.5 hours per side for the manifold plus extraction time...usually another 0.5 per side depending on how many bolts are broken.
if the bolts aren't broken...try a different fuel supplier or go up an octane and see if the problem changes.
Last edited by primem; 03-13-2018 at 09:24 PM.
#3
03-13-2018, 10:45 PM
Join Date: Mar 2018
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don't drill or use extractors...have seen more head damage using this method.
I do this repair monthly...mig weld a nut onto the broken stud and turn the nut out with a wrench. if the stud is below the surface of the head, put a few tacks on it to build it up, place the nut over the hole and weld thru the hole in the nut to bring the stud and nut together.
measure the warpage of the manifold...if its exceeds 0.008" per foot, consider machining it or replacing.
shops charge 1.5 hours per side for the manifold plus extraction time...usually another 0.5 per side depending on how many bolts are broken.
if the bolts aren't broken...try a different fuel supplier or go up an octane and see if the problem changes.
I do this repair monthly...mig weld a nut onto the broken stud and turn the nut out with a wrench. if the stud is below the surface of the head, put a few tacks on it to build it up, place the nut over the hole and weld thru the hole in the nut to bring the stud and nut together.
measure the warpage of the manifold...if its exceeds 0.008" per foot, consider machining it or replacing.
shops charge 1.5 hours per side for the manifold plus extraction time...usually another 0.5 per side depending on how many bolts are broken.
if the bolts aren't broken...try a different fuel supplier or go up an octane and see if the problem changes.
#4
05-02-2018, 01:41 PM
#5
05-05-2018, 03:09 AM
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Dawson, I am in the same situation I have a 2011 HEMI Durango and have looked on forums and youtube and can only find the older Durangos or Ram trucks. I can not identify the best way to access the manifold bolts, did you have any luck? Any Dodge Mechanics that can share the tricks.