Can a small block timing chain jump a tooth?

[furrystump]

So the only thing that could create a large timing difference from crank to rotor, assuming the timing set is NOT the issue, would be intermediate shaft worn or cam dist drive gear worn. Could it have a bronze gear on the pump drive?

 

[ChrisRom]

So the only thing that could create a large timing difference from crank to rotor, assuming the timing set is NOT the issue, would be intermediate shaft worn or cam dist drive gear worn. Could it have a bronze gear on the pump drive?

I am thinking this is what happened - somehow the distributor shaft jumped a tooth from the cam. It doesn't have a bronze gear, but it does have the brass insert for the dist./pump shaft. The gear at the end of the camshaft looks a bit worn, not broken.

 

[furrystump]

Can you pull the distributor and put a big screw driver in the intermediate shaft and see how much play it has. Make sure it’s not climbing the cam gear.

 

[Dicer]

Well, if you have the timing chain cover off may wish to check the timing sprocket(s) keyways.

 

[plumkrazee70]

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