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Loose exhaust manifold nuts on 1994 3.9 V6 #1469094 07/17/13 12:19 AM 07/17/13 12:19 AM
Joined: May 2005 Posts: 125 Iowa D dsp OP member
dsp OP member D Joined: May 2005 Posts: 125 Iowa	I have a 1994 Dakota with a 3.9 V6. The front two exhaust manifold nuts keep loosening up. Did Chrysler ever install a metal retainer (similar to the ones used on a Chevy SB) to keep this from happening? If so, do you know the part number?

Re: Loose exhaust manifold nuts on 1994 3.9 V6 [Re: dsp] #1469095 07/17/13 12:54 AM 07/17/13 12:54 AM
Joined: Jan 2003 Posts: 5,445 So Cal Sinitro master
Sinitro master Joined: Jan 2003 Posts: 5,445 So Cal	Don't know about a metal retainer.... But I can say as you tighten the nuts, you are weakening/stretching the OE studs.. And one day the studs will simply break off due to overtighening and heat expansion.... Better to pull out the OE studs now and install some higher quality ARP heat treated studs.. Just my $0.02...

Re: Loose exhaust manifold nuts on 1994 3.9 V6 [Re: Sinitro] #1469096 07/17/13 09:17 AM 07/17/13 09:17 AM
Joined: May 2003 Posts: 15,487 Florida S scratchnfotraction I Live Here
scratchnfotraction I Live Here S Joined: May 2003 Posts: 15,487 Florida	Quote: Don't know about a metal retainer.... But I can say as you tighten the nuts, you are weakening/stretching the OE studs.. And one day the studs will simply break off due to overtighening and heat expansion.... Better to pull out the OE studs now and install some higher quality ARP heat treated studs.. Just my $0.02... mopar use a conical washer for yrs on the end studs of the 318/340/360 engines along with pre-mag v-6 do you have the conical washer that goes on with the nut? take a center punch and peen it on a flat and then do it on the opposite flat to help lock it once torqued. nothing worse than a broke exhaust stud.

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