Jeep 1987 Wrangler Workshop Manual page 356

ENGINES
4.2 LITER (258 CID) SIX-CYLINDER ENGINE
Hydraulic Valve Tappets Removal
Remove the cylinder head cover. Refer to
C y l i n d e r H e a d C o v e r R e m o v a l for the
procedure.
Remove the bridge and pivot assemblies and
rocker arms by removing the two capscrews at
each bridge. Alternately loosen each capscrew,
one turn at a time, to avoid damaging the
bridges.
Remove the push rods.
NOTE: Retain all the components in the same
order as removed to facilitate installation at the
original positions.
Remove the intake and exhaust manifolds,
cylinder head and gasket. Refer to Cylinder
Head Removal for the procedure.
Remove the tappets (A) through the push rod
openings in the cylinder block with Hydraulic
Valve Tappet Removal and Installation Tool
J-21884, or equivalent.
86371
Retain the tappets in the s a m e order a s
removed to facilitate installation at the original
positions.
Hydraulic Valve Tappets
Installation
NOTE: It is not necessary to charge the tappets
with engine oil. They will charge themselves
within a very short period of engine operation.
Dip each tappet in AMC Engine Oil Supplement
(EOS), or equivalent.
Use Hydraulic Valve Tappet Removal and
Installation Tool J-21884, or equivalent, to install
each tappet in the same bore from where it was
originally removed.
Install the exhaust and intake manifolds,
cylinder head and gasket. Refer to Cylinder
Head Installation for the procedure.
Install each push rod in the same location from
where removed.
Install the rocker arms and bridge and pivot
assemblies at their original locations.
Loosely install the capscrews through each
bridge. Tighten the capscrews alternately, one
turn at a time, to avoid damaging the bridges.
Pour the remaining E O S over the entire valve
actuating assembly.
NOTE: The E O S must remain with the engine oil
for at least 1,609 km (1,000 mi) but need not be
drained until the next scheduled oil change.
Install the cylinder head cover. Refer to Cylinder
Head Cover Installation for the procedure.
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