Installation

1. Bleed auto-lash adjuster as follows:
a. Immerse lash adjuster in clean diesel fuel.
b. While lightly pushing down inner steel ball with a small wire, move plunger up and down several times to bleed air.
c. Remove small wire and press plunger. If plunger is hard to depress, lash adjuster is operating normal, proceed to Step e.
d. If plunger can be easily depressed, repeat Steps a through c. If plunger is still loose, replace lash adjuster.
e. After bleeding hold adjuster upright to prevent diesel fuel from spilling out, set lash adjuster on leak down tester, tool No. MD998440, or equivalent.
f. After plunger has depressed 0.008-0.020 inch, measure time taken for plunger to drop an additional 0.04 inch. If plunger drops 0.04 inch in 4-20 seconds, lash adjuster is operating correctly.

Fig. 16 Exploded View Of Rocker Arms & Camshaft:

2. Reverse numbered sequence shown in Fig. 16 to complete installation, noting following:
a. Insert rocker arm shaft into front bearing cap so notch on shaft faces up. Do not tighten at this time.
b. Install wave washer with raise side toward front bearing cap.
c. Install rocker arm marked 1-3 for cylinders 1 and 3 and rockers marked 2-4 for cylinders 2 and 4.

Fig. 17 Camshaft Bearing Caps Identification:

d. Identify bearing caps 2, 3 and 4 as shown in Fig. 17.
e. Install bearing caps with front marks pointing to camshaft sprocket side of engine.
f. Bleed auto-lash adjuster as outlined under Step 1, then insert adjuster into rocker arm securing with lash adjuster holder, tool No. MD998443-01, or equivalent.
g. Install camshaft oil seal using seal installation tools, No. MD998306-01 and MD998307-01, or equivalent.
h. Apply sealant to outer circumference of circular packing then install on cylinder head.