Quote:
Originally Posted by Maxbumpo
Refurbished head? I'd say get a used head and then have a competent machine shop evaluate and give you a quote for a valve job.
Plug the hole: I love the idea of the lead plug, and I would probably leave the remains of the glow plug exactly where they are.
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Thanks for liking my idea!
Copied here from post #114
"I am thinking something like this:
Tap the 1/2" hole for a hex bolt (where the glow plug thread was, do not use pipe thread!) Make a plug out of lead with a pointy end matching the 1/2 drill point of the existing hole and long enough to cover the big breach area (melt some fishing lures and make a mold). Hammer the lead plug into the hole with a punch and hammer to expand it so it fills any space between the lead plug and the hole, then tighten the bolt and force the lead plug further in. I think lead melts at around 600F and it may work. You can always tighten it more to exert more pressure."
I would add here before putting the lead plug in, use a self tapping screw sized to fit the 13/64 hole and drive in in then grind the head off with a Dremel. This adds another layer of protection to keep coolant out of the pre chamber. Then put the lead plug in, hammer it to expand and fill the nooks and cranny then put the bolt in to press it in further to keep it in place. The lead plug seals the big gaping hole as well as provide a force on the remnant of the glow plug making the taper seal do its job.