Xj broke down while traveling

[Vitzaa]

https://youtu.be/U-v6zP3ebU8

[RCP Phx]

That sucks because now you have to find out what broke and WHY!

[Vitzaa]

https://youtu.be/n_CffDHwW5o

I'm guessing it was binding when installed.

[RCP Phx]

What does the cam gear look like?

[Vitzaa]

Originally Posted by RCP Phx

What does the cam gear look like?

Cam looked fine. Saw the wear on the teeth but nothing worn off at all...

Jeep fired right up. Gonna do a test drive in a bit, hopefully the timing is still on.

[tech1001]

Make sure that the oil pump turns free you can use a screwdriver to turn it by hand

[Vitzaa]

Originally Posted by tech1001

Make sure that the oil pump turns free you can use a screwdriver to turn it by hand

It did, had to rotate it a couple degrees to line up with the shaft pin



It's stumbling and misfiring under load. Gonna redo the timing tomorrow...

[maxbraketorque]

Originally Posted by Vitzaa

https://youtu.be/n_CffDHwW5o

I'm guessing it was binding when installed.

This is interesting to see and want to make sure I understand what caused the cam position sensor tone ring to stop rotating. Had the lifted off the motor and was no longer engaging with the camshaft (and no longer pumping oil)? Or can the gear on the oil pump driveshaft come loose?

[RCP Phx]

Originally Posted by maxbraketorque

This is interesting to see and want to make sure I understand what caused the cam position sensor tone ring to stop rotating. Had the lifted off the motor and was no longer engaging with the camshaft (and no longer pumping oil)? Or can the gear on the oil pump driveshaft come loose?

No to all the above, if you sucked something that big (no oil pump sreen) into the oil pump it would just shear the shaft or the distributor gear and vertical movement is not possible.

[Vitzaa]

I honestly can't remember if it rotated when I pulled it off (still engaged with cam teeth or not). The synchronizer gears were worn unevenly with one section almost completely sheered off. I'm guessing it stopped being engaged with the cam in that area... Not sure what caused the uneven wear though. The oil pump and screen are new (~4k miles)
Previous owner neglected the jeep and was pretty sloppy with his work so I'm sure oil changes weren't routine. I've also got a mild lifter tick. He had a shop put install a performance head when the OEM one cracked. Didn't say anything about a cam swap so I'm guessing the cam is stock (alignment wise). I'm at 200k miles

[maxbraketorque]

ok, so you purchased or are purchasing a new assembly?

[Vitzaa]

Purchased a new one, luckily napa had one

[Vitzaa]

Does anyone know how to resync fuel timing without the DRB scan tool?
I think the oil pump slot got misaligned when things got bound up or when I installed the new synchronizer . I was unable to drop in the replacement synchronizer without slightly rotating the oil pump slot maybe 30 degrees, which caused the fuel timing to be thrown off. ��

[RCP Phx]

Oil pump position is irrelavant, you need to set the distributor when the engine is on compression tdc.

[RCP Phx]

Here's a quick vid on the "toothpick" method.......
https://www.youtube.com/watch?v=eV7ase3dcoc