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Ouch.
I wonder
1) what the hardness of that crank gear is?
and
2) what caused it to strip, an over load of some kind?

With bent pushrods, I'd expect both valve problems and piston problems.
But you won't know until the head comes off.

On that engine I worked on, if the cam was even 1 tooth off, the valves were into the pistons.

Dan
 

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the crankshaft provides the power... the cam shaft receives it.
For it to be stripped, it either:
  • has to be a quality problem - an initial failure in the gear, "for no good reason" resulted in catastrophic cascade of failure... this is unlikely per my thinking....
  • or there was a problem in the valve train - a jam up in the cam shaft.. failed bearing... low oil?.. seized?... which jammed up the shaft and caused the crankshaft to try to "overpower" the jammed camshaft, thus stripping the gear teeth.... this is the more likely scenario per my thinking....
 

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Discussion Starter #23
Thanks Wally. Not low on oil, engine not seized, push rods go up and down. Good compression. I'm looking into short block or new engine, pretty pricey. Any ballpark on what I assume would be an overhaul might cost? To replace that gear probably means disassembly of the entire engine so should probably do bearings, rings etc. Thanks again for your interest. Bob
 
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