Ok how does the timing slip and how do i keep it from doing this. Is it from not tourquing the nut enof or do they just slip because my truck used to get like 20 and now in 6 months its getting 13 and i dont have that much done to the pump.

 

the gear is a tapered fit so the shaft and gear must be super clean when timing is set. Cummins says to torque the gear nut to 144ft/lbs, Most my self included torque the nut to 155ft/lbs to help prevent slipping.

 

How many miles have to be stacked on a stock truck generally for the timing to slip?

 

also make sure the shaft and the gear is clean of oil, spray them down good with brake cleaner or lectramotive spray befor you install

 

I have found that electrical contact cleaner work the best

 

Ok well i am about to do the timing here quickly were can i get the delivery valve washer.

 

When I did my timing before I got my pump sent off and built I just reused the washer and didn't have any troubles.

 

It can really vary, but it wouldnt hurt to have it checked every 100,000 miles or so, not that big of a job to check it, plus it could slip a little bit and you cant really tell, can effect performance and mileage.

 

Ok thank you

 

So i can reuse the washer?