I have a couple of exhaust manifolds that the DPO tried to drill out broken studs and did a royal job of screwing everything up. Crooked, oversized holes make the manifold all but worthless. Been wondering how I can repair the holes back to standard. Holes are too big and crooked for helicoils. Need to fill the in and redrill and retap. Any ideas on how I can weld the holes up without having the weldmetal turn out too hard to drill and retap?
There are other types of inserts available, such as Keen-serts, that are a solid type of construction rather than wound wire. Their outside thread is normally much larger than the internal thread, and a different pitch. That type insert should take care of your needs.
michael
Try these guys:
-Carl
Great idea to have these installed in the spark plug holes if ever rebuilding an aluminum head.
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