Cam change

A

aircop

New member
Joined
Apr 30, 2007
Messages
491
When changing cams is it a must to change out lifters, as I've always done on a gas engine. If so, what is the best way to R&R them.
 
It's recommended so they seat to the lobes, I'm guessing like a gas application.

It's kinda hard to explain how. Basically it involves dropping them into a tray and then fishing the new one up the hole with a string and rubber stopper. I'll see if I can find a short PDF with the factory instructions and tools.
 
REMOVAL:

NOTE: This procedure requires use of Miller Tool 8502 Tappet Replacement Kit, or Cummins Tool Kit #3822513.

1. Remove camshaft
2. Insert the trough (provided with tool kit) the full length of the camshaft bore (Inserting the Trough). Make sure the cap end goes in first and the open side faces up (towards tappets).
3. Remove only one tappet at a time. Remove rubber band from one cylinder pair and attach tappet dowel not being removed to the next cylinder pair (Secure Dowel/Tappet to Adjacent Cylinder).
4. Raise dowel rod (disengage from tappet) and allow tappet to fall into trough (Lift Dowel Rod to Disengage from Tappet).
5. Carefully remove trough (do not rotate) and tappet. If the tappet is not being replaced, mark it so it can be installed in its original location.
6. Re-install trough and repeat procedure on remaining tappets.

INSTALLATION:

1. Insert the trough the full length of the camshaft bore (Inserting the Trough). Again, make sure the cap end goes in first and the open side faces up (towards tappets).
2. Lower the tappet installation tool through the push rod hole (Insert Installation Tool through Push Rod Hole) and into the trough.
3. Retrieve the tappet installation tool using the hooked rod provided with the tool kit (Retrieve Tappet Installation Tool through Cam Bore).
4. Lubricate the tappet with clean engine oil or suitable equivalent and install the tappet to the installation tool (Insert Tool and Pull Tappet Into Place).
5. Pull the tappet up and into position (Insert Tool and Pull Tappet Into Place). If difficulty is experienced getting the tappet to make the turn into the tappet bore, wiggle the trough while gently pulling up on the tappet.
6. With the tappet in place, rotate the trough one half turn so the open side is down (toward crankshaft) (Rotate Trough One Half Turn (180°)).
7. Remove the tappet installation tool from the tappet.
8. Re-install a dowel rod and secure the rod with a rubber band.
9. Rotate the trough one half turn and repeat the procedure for the remaining tappets.
10. Install the camshaft.

Ebay has one of these tappet kits for sale if your interested. http://cgi.ebay.com/ebaymotors/Cumm...ryZ35625QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

hope this helps,

Dave
 

Attachments

  • Tappets1.gif
    Tappets1.gif
    8.2 KB · Views: 38
  • tappets2.gif
    tappets2.gif
    12.6 KB · Views: 36
  • tappets3.gif
    tappets3.gif
    7.8 KB · Views: 41
  • tappets4.gif
    tappets4.gif
    11.6 KB · Views: 36
  • tappets5.gif
    tappets5.gif
    10.8 KB · Views: 30
I forgot to note that you'll probably want to use a PVC pipe instead of steel exhaust pipe since the steel can scratch the cam bearing.
 
I put my helix 2 in at about 223,000 miles. I did not change tappets and all has been fine so far. "knocks on wood"
 
If I where changing the cam what gaskets if any do I need. Crank seal? Timming cover is it a gasket or sealer?
 
Just RTV grey is what I use for the cover. And a oil seal from cummins and a gear case seal.
 
aircop said:
If I where changing the cam what gaskets if any do I need. Crank seal? Timming cover is it a gasket or sealer?
Click to expand...

Front Crank seal, RTV for the front cover, Maybe some new coolant if yours is old.

Brett
 
Im looking in to gettin a Helix 2 cam. What is the labor time/charge to have it done?
 
You must log in or register to reply here.
Back
Top