11-11-2024, 06:54 PM
(11-11-2024, 01:43 AM)Brian Gibbons Wrote: Hi Peter. Your solution may depend on the condition of the block casting, where your bolt has failed. If the casting around the hole is sound then taking it out to a 3/8 thread is quite successful (and has, in my observation, been done many times). A stainless steel bolt is often used. Exercise care to prevent accidental drilling or tapping into the bore ( I have put a plate behind the hole in past as a precaution). If you block casting is cracked at the hole, then a drilled plate can be purchased from Cherished suppliers to expedite this issue. There is generally not a lot of casting for the metalock process (though others may have another experience). I’m not an expert (just an owner for over 40 years).
My Ruby had a hole in the cylinder wall immediately adjacent to the water intake stud. So accidental drilling into the bore really does happen.
Fortunately the hole was smaller than stud diameter. I suspect it was caused by drilling into a broken stud to insert an "easy-out" to remove the stud. Amazingly there was a similar size hole in the piston ring adjacent to the hole in the cylinder wall.
The engine was still able to run quite well because the guilty mechanic had filled the hole in the cylinder wall with plastic metal! The hole was sufficiently down in the bore to avoid being subject to full combustion pressure.
Of course, when I overhauled the engine, I scrapped that block.