60 series cam timing

Happened to my neighbor. Truck still ran, but not great. Bent valves, had to replace head. 2nd Mechanic noticed it somehow. Must have been after head was off. Not sure. Can’t remember the whole story. Either way, he saw the timing marks were off without taking the front covers off. I can call the Mechanic and ask, if you don’t find any more info.

 

This will not be a popular opinion. But they will run one tooth off, no damage. It might not run well, but will run. It is very difficult to jump a tooth, unless the front gear train was disassembled or its worn out. Not using a cam gear holding tool to change diamond seal, or cam would be next to impossible to get it out of time. I understand the book does not agree with this, just my opinion. If it bent valves? Its more than 1 tooth off.

 

I may be wrong about the bent valves. I’m wondering how the mechanic saw it? Would the head need to be off? Or just valve cover, rockers and cam maybe?

 

There is a procedure to measure the timing. You need a dial indicator and you need to know the spec for your engine which is in repair manual it's not that big a job. I have seen them run a tooth out and not run well just be sluggish. I have seen them run a tooth out and smoke as well as be hard to start. Depends on which way its out

 

Never seen slightly bent valves. Changed thousands of diamond seals and cams without a holding tool. Cam has a dowl that goes into thrust plate. Only one way. Unless you miss it and crush the hollow dowl pin in the cam while tighting cam gear. Which that causes the back cam cap to break into pieces.

Yes I did it once, that how I know this.

If its out of time, the gear train is worn out, or assembled wrong.

 

Were you been hiding, and how's Doc?

 

We just runnin this cow bus as hard as its ol slow ### will go. Doc is still the same ol Doc. Hard to live with, stealing what he wants to survive

 

Ruff life as a Griffter!