1970 c10 4x4 starter and harmonic balancer trouble

[scottmitchellrose]

Originally Posted by HO455

I wouldn't worry about the starter at this point until you get the balancer bolt problem solved. You need to get a good look at the threads to be sure of the damage. Maybe photos would help, but most likely you will need to pull the fan and shroud (and maybe the radiator) to get in and see the threads. You may have to get some competent local help to take a look and help decide what the next step may be. It is possible that you will be able chase the threads with a tap but your alignment will have to be dead on as you will get only one chance. Or possibly using a Dremel to grind the bad threads down allowing the bolt to align and thread in. Once you have the thread issue behind you make sure you use the proper tool to install the balancer and not the bolt. You threads at the front of the crankshaft have been compromised and need to be babied or things could get worse.
Of course this would be much easier with the crankshaft on the bench or the engine out of the truck. Hence my recommendation to not worry about the starter at this point. Maybe there is someone here on the board that may be close and could help. You might try posting this again in the engine section to widen the audience.
Good luck.

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