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I'm hoping to find a machinist referral to a shop that is experienced with Volvo's in the San Diego/Southern California area.
While beginning an exhaust system replacement I sheared a manifold stud. The stud that sheared was at the #4 cylinder exhaust port.
The two links, which I hope are formatted properly, show the head and the cylinder. It is clear that the environment in the #4 cylinder is different then the other 3 cylinders.
In addition to a referral of a machinist that not only can extract the sheared stud but also has the ability to replace valves if needed, I'm looking for input into what might be happening.


Thank you for your input!
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