I have been doing quite a bit of preventative maintenance on my truck over the past two months. Well, yesterday I went to complete the work then a valve lash adjustment since I removed all the rocker levers, pedastals etc. On my #5 Intake tappet, I went to check that the pushrod was seated properly and checked the magnetic pickup of the tappet. The pushrod wouldn't pickup the tappet like it should have. I took the exhaust pushrod out and tried it and still nothing. I used the intake pushrod on the exhaust tappet and the tappet came up.

My question is, is there anything I can do to magnetize the tappet? I don't want to have to pull the front all apart and pull the camshaft again. I have 248K on my engine with no problems except for front and rear seals going out. The camshaft looked great when I pulled it out the first time. Any engine builders or cummins technicians please feel free to chime in. Thanks!

 

Anyone have a solution to this?

 

I would like to know. ?

 

bump

 

Maybe I'm reading this wrong and I apologize if i am, but the camshaft pushes the lifter up when it turns. there is no magnetic pickup on any engine I ever built. The gear between the crankshaft turns the camshaft and the lobes on the camshaft open and close the lifters. If i'm off base on reading the original post Sorry!

 

Yeah, what he said. There is no magnetism magic at work there. If you notice that when picking up on some of the push tubes that the lifters come up a little bit its just the suction of the oil film causing the lifter to stick to the end of the push tube. If it wont pick it up it may be because the lifter is at the top of its stroke meaning the cam lobe is up.

 

With you , never seen magnetic lifters. But I have been wrong before.

How about cam lobe pushes the lifter up, valve spring pushes it back down. No magnets.

 

) Install push rods into their original locations
(Fig. 19). Verify that they are seated in the tappets.
(5) Lubricate valve stem tips and install the crossheads
in their original locations.
(6) Lubricate the rocker arms and pedestals and
install them in their original locations (Fig. 20).
Install the bolts and torque them to 36 N·m (27 ft.
lbs.).
(7) Verify that the valve lash settings are maintained
(Refer to 9 - ENGINE/CYLINDER HEAD/INTAKE/
EXHAUST VALVES & SEATS - STANDARD
PROCEDURE).
(8) Inspect rocker housing gasket for cuts and
proper installation into groove. Replace if damaged.

 

this is the procudure for cam removal, you won't do this , only used to explain tappety will not come out the top;;;;;
) Raise the tappets as follows, using the wooden
dowel rods (Fig. 57)provided with the Miller Tool Kit
8502.
(a) Insert the slotted end of the dowel rod into
the tappet. The dowel rods for the rear two
cylinders will have to be cut for cowl panel
clearance. Press firmly to ensure that it is seated
in the tappet.
(b) Raise the dowel rod to bring the tappet to
the top of its travel, and wrap a rubber band
around the dowel rods (Fig. 57) to prevent the tappets
from dropping into the crankcase.
(c) Repeat this procedure for the remaining cylinders.
(26) Verify that the camshaft timing marks are
aligned with the crankshaft mark (Fig. 56).