Engine/Transmission (1994 - 1998) timming lock washer?

[Dbonzi]

Is the lock washer behind the nut that holds on the timming gear supposed to look like a regular lock washer? Mine is totally flat and doesn't look like it would do much.

Thanks for any replies as I'm in the middle of timming the beast.

Dennis

 

[Howard Durand]

It is just a flat washer.

With the 144 or more foot pounds of torque on the nut, it won't come loose.

 

[Dbonzi]

Ok Thanks,

I'll put it back together then.

This is the best forum

Dennis

 

[Jim Fulmer]

Odd, If you go buy a new one from Cummins (there $1. 90) they are oblong also, mine was flat and I thought it was ok till the timing slipped, next time I go back I'll get several for spares.



Jim

 

[Howard Durand]

Jim,



Is the one you got from Cummins cupped or wavy so that when the nut is tightened it maintains a constant pressure between nut and gear? Something like that probably would be better than the flat one. I sure wouldn't want to use a common split lock washer.



I have read on this forum about the difficulty some of the folks are having with the gear slipping following a timing change.

Consequently, I used almost a full can of brake cleaner and blew it out with a mild blast of air before replacing the washer and nut.

I torqued it to 150 foot pounds and it has held fine.

I rechecked it after about 3000 miles just to make sure.



Do the pumps for the higher horsepower engines require more torque to turn them than the pump in my lowly 160 hp 94?

If so, that may have prompted them to change the washer.



Howard

 

[Jim Fulmer]

Howard, yes they are wavy and I T/Q it to 160 as per Piers. It holds fine like this even with my pump, I never even asked about the washers before. Yep I'm real picky about the break cleaner also, clean the heck out of it.



Jim