Timing issue

[CoalRoller01]

My buddy has a 95 12v and we swapped his 160 pump for a 180. Got the pump in and timed it to 16.5*. But now it seems like every few weeks it jumps timing and we have to time it again. We have gone over it a few times and still can not figure out why it is doing it. Has anyone had a similar problem?

 

[YkDave]

Pull the pump and inspect the shaft and gear for any sign of damage. The SLIGHTEST bit of oil or even a hair or thread from a rag will cause the gear not to seat on the shaft properly and it will slip. The gear and shaft need to be super duper surgical tool kind of clean!

 

[Jim Fulmer]

Clean the shaft well with brake cleaner or contact cleaner and install a new washer torqued to 160.....ever time, been doing it this way for 6 years now and have never slipped timing.

Jim

 

[CoalRoller01]

Ok I will give it a shot and let you know how it goes. thanks

 

[Chevycummins]

weston (smokem) suggests sanding the shaft with a little bit of 80 grit sand paper working from the threads towards the pump just to scuff it up a little to help bite on the gear a little bit and then tq down between 145-165ftlbs and like stated earlier make sure it is good and clean of oil and debris.