Posted by Andy R on January 13, 2020 at 17:40:28 from (208.126.193.44):
I was installing a new fuel pump on a Kohler V twin small engine when a 1/4 inch bolt twisted off that holds the fuel pump to the top of the head. The fuel pump runs off of the valve rocker arm. There are 4 bolts total and the other three came loose easily. The bolts appear to have some hardness. Fortunately today I was able to drill entirely through the center of the broken bolt with a 9/64 drill bit. I tried to use an easy out to back out the broken bolt but was very careful not to break off the easy out. It didn't want to back out. Worst come to worst I can just keep drilling on the bolt and re-tap the hole and I might try some left hand drill bits. Here is my question .... what things can I do to help loosen the bond between the aluminum and the steel if I want it to back out with either the easy out or left hand drill bits? I have been spraying penetrating oil on it. Does heating and cooling help and should this be done with a hand held propane torch? Any ideas are appreciated. Thank you.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
... [Read Article]
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