Expo LRV AWD L4-2350cc 2.4L SOHC 16 Valve (1993)
Camshaft Oil Seal: Service and Repair
REMOVAL
Fig. 24 Rocker Arms & Camshaft
1.
Release fuel system pressure as outlined under MAINTENANCE PROCEDURES/FUEL SYSTEM PRESSURE RELIEF.
2.
Disconnect battery ground cable.
3.
Remove timing belt as outlined under TIMING BELT.
4.
Replace camshaft, camshaft oil seal, rocker arms and rocker arm shafts in numbered sequence shown in Fig. 24, installing auto-lash adjuster
holder tool No. MD998443 or equivalent, prior to removal of rocker arm and rocker shaft assembly, to ensure the auto-lash adjuster is not allowed
to fall.
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 the 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 .008-0.020 inch (.2-0.5 mm), measure time taken for plunger to drop an additional .04 inch (1mm). If plunger
drops .04 inch in 4-20 seconds, lash adjuster is operating correctly.
2.
Reverse numbered sequence shown in Fig. 24, noting the 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 the 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.
