So I just finished a rebuild on a 16hp Kohler, CV460S. Everything went fine until I snapped the crankshaft bolt on the flywheel side....bad...about 3/4" deep. There is no getting the bolt out. Replacing the crank is not an option, the engine just isn't worth it. Are there any options? Could I drill and tap the top 3/4" inch of the shaft and put another bolt in? Any ideas? I have nothing to lose at this point.
Start by heating the crank then applying your favourite penetrating oil.
Do it a couple of times.
Next get a Left hand drill and drill the bolt
Usually this will cause it to screw out.
If not get a tap 3/8 UNF L/H and thread the hole
Next use a grade 9 L/H 3/8 UNF Socket headed cap bolt as an extractor with an inhex socket head on an impact driver of some sort.
Nope, don't need to get it red hot just too hot to touch which is about how hot it gets when running.
Pt some oil over the seal then a washer or something to divert flames hot air contacting it directly.
Got it! Did just what you said Bert and it came right out. I would have sworn that bolt was in there for good. Got it all buttoned up now and running like a sewing machine.
Got it! Did just what you said Bert and it came right out. I would have sworn that bolt was in there for good. Got it all buttoned up now and running like a sewing machine.
