How to remove broken exhaust stud
Hi everyone
I needed to replace the exhaust manifold gasket because it just started leaking. I bought the gasket kit for the manifolds, cat, and crossover pipe . Also a new 02 sensor. I was almost successful in removing all the exhaust manifolds studs but one broke on the drivers side. It was the lower one closer to the head gasket. It still has about 1/2” of it showing. So I guess I’m lucky it didn’t break off flush. Can I use a MAP gas torch to heat the stud and try and remove with vise grips? I don’t want to overheat the aluminum head and warp the head gasket. I wanted to try heat first because I have the map gas and a regular torch. If that doesn’t work I’ll get a welder and try and weld on a bolt to the remaining stud and try and unscrew that way. I just needed thoughts on the map or torch heat with aluminum head....
Thanks in advance!
Exhaust manifold studs stripped threads in head
All the exhaust stud threads in my drivers side head are completely stripped out. I do have the 7mm studs from DMCH but I will need to drill the heads and use a heli-coil. I was wondering if it was possible to just use a SAE stud from NAPA or even a ACE hardware? I figured if I can use a slightly bigger SAE size than the original 7mm I could get away from using the heli-coil and I could just tap the stripped hole for the SAE size stud. Does that make sense and is this possible?
Also some of the stud holes are close to the edge of the head. Is there enough room to use a heli-coil if I need to?
I’m thinking of getting new exhaust manifolds since my are pitted and they are off the car. Is this strictly a Delorean part or were these the same for a early 80’s Volvo? I’m thinking not because I’m not sure the Volvo had the crossover pipe.
Thank you for your help