F134 Cam not turning HELP!

While driving on a trail last my 64 CJ5 just up and quit.

After fooling around with it for quite a while I noticed the rotor does not turn when the motor cranks. You cant turn the rotor bug by hand so it is connedted to the cam/oil pump gear. What cold be the problem and how could it have happened?!?!? Thanks in advance. Doug

 

If you can't turn it by hand, and neither does cranking the engine, could the distributor shaft be seized up?

If so, the drive gear could be stripped out, or the roll pin that (If I recall...) holds the gear on the distributor shaft could be sheared.

See if you can pull the distributor out, and check out the lower end of the shaft.

Pete

 

Or maybe a broken timing gear. Kinda hard to say without looking at it.

 

I cant imagine that large fibre gearing shearing teeth but maybe it did.
I will check the end of the dist shaft and look down the hole to see if the oil pump shaft or anything is moving.

Anybody ever seen the fibre gear shear??

 

I haven't on these, but it is possible. Pull the distributor first and check it out.

 

I need to correct myself on my earlier post.

On an F-134 the distributor drive gear is part of the oil pump assembly, I believe. It is held with a roll pin. The distributor shaft is like a screwdiver blade and sets into the slot in the top of the oil pump gear. (It is offset slightly, will only fit in one position.)

You may need to also pull the oil pump and see if something is sheared or stripped. Worst case scenario is the gear teeth on the cam are broken due to the pump seizing up.

Possibly this could happen if the pump sucked up some debris - a piece of broken oil ring or such.

I wish you luck, and let us know...

Pete

 

yes

 

Lots or really great tips. I will check them all out. Its such a nice lilttle Jeep I just got to get it going again.

 

Took off the valve cover last night and cranked her over. Lifters do not move at all!
Fiber gear eat up, keyway lost?
Any ideas. I wont get to look inside for a little while. Doug

 

might have a busted cam too. we had one snap just past the #1 cam bearing and it did the same thing, course it backfired first then fell dead.

 

I have had the fiber gear shear. It was a '66cj5 with th f-head.

I was living in Chesapeake Va at the time.

One thing I remember is that the engine seemed to spin easier when running the starter motor. I suppose most of the valves were left open.

At the time I did not know anything about these motors and had it towed to a dealer.

If it is your fiber gear, take your time in removing it. There is a lot of opportunity for collateral damage. You will save yourself a lot of headache if you can remove only the fiber gear and not disturb the relationship between the distributor and camshaft.

Align the "O" marks in the fiber gear and crankshaft and you should be good to go.

Sometimes the "O" in the fiber gear is hard to see -- I have used a number stamp to make it stand out better.

You might want to check the nozzle on the gear lubricatior to make sure it is not clogged somehow while you have it apart.

If there is any way to do it I'd use either an NOS part or a used part. I don't trust the quality and reliability of reproduction parts for items as critical as this gear.