Cylinder Head Cover; Push Rod Cover - Jeep J-10 Series 1982 Technical & Service Manual

1B-14 EN6INES
(8) Install heated air tube and air cleaner.
(9) Install oxygen sensor, if removed.
(10) Raise vehicle and connect exhaust pipe to mani
fold. Tighten nuts with 35 foot-pounds (47 N«m) torque.
Lower vehicle.
CYLINDER HEAD COVER
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(1) Remove air cleaner.
(2) Remove PCV valve (or hose). . : '*
(3) Remove cylinder head cover bolts.
(4) Remove spark plug wires from spark plugs and
bracket clips.
(5) Remove cylinder head cover by tapping with a
rubber hammer to loosen RTV gasket seal. Do not pry on
cover.
Installation
(1) Thoroughly clean sealing surfaces on cylinder
head cover and cylinder head.
(2) Apply continuous 3/16-inch (5 mm) diameter
bead of RTV sealant on cylinder head cover as illus
trated in figure 1B-25.
(3) Position cover on head, install retaining bolts
and tighten with 7 foot-pounds (10 N*m) torque.
(4) Install spark plug wires, PCV valve (or hose) and
air cleaner.
APPLY A CONTINUOUS
3/16 in. (5 mm) DIAMETER
BEAD OF RTV SEALANT
AS SHOWN
PUSH ROD COVER
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APPLY A CONTINUOUS
3/16 in. (5 mm) DIAMETER
BEAD OF RTV SEALANT AS SHOWN
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Re. 1B-25 Cylinder Hud Cower ud
Pit* Rod Coter RTV Sealant AnpHcatlon
PUSH ROD COVER
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(1) Remove intake manifold. Refer to Intake Mani
fold for replacement procedure.
(2) Remove push rod cover bolts and remove cover.
Installation
(1) Thoroughly clean sealing surfaces on push rod
cover and cylinder block.
(2) Apply continuous 3/16-inch (5 mm) bead of RTV
sealant on push rod cover as illustrated in figure 1B-25.
(3) Install cover and cover-to-block bolts. Tighten
bolts with 75 inch-pounds (9 N*m) torque.
(4) Install intake manifold. Refer to Intake Mani
fold for replacement procedure.
CYUNDERHEAD
The cast iron cylinder head is designed to provide a
compression ratio of 8.2:1. It is cast with individual
intake and exhaust ports for each cylinder. The valve
guides are cast integral with the head and the rocker
arms are retained on individual threaded capscrews.
The combustion chambers are cast to ensure uniform
shape for all cylinders. The spark plugs are located near
the intake valves to provide maximum combustion effi
ciency. The intake valves have 46 degree seat angles and
are large to provide sufficient air/fuel intake for high
power requirements. The exhaust valve seat angle is
also 46 degrees. The 46 degree seat angle assures valve-
to-seat contact at the outer diameter of the seat
External shields are used on both the intake and ex
haust valves to reduce the amount of oil splashed
against the stems. Valve stem seals are also used on
both the intake and exhaust valves to prevent oil from
entering the valve guides. The face angles of both the
intake and exhaust valves are 45 degrees.
Removal
WARNING: The battery negative cable must be re
moved to prevent a potential fire hazard when the fuel
pipe is disconnected.
(1) Disconnect battery negative cable.
(2) Remove cylinder head cover. Refer to Cylinder
Head Cover Removal for procedure.
WARNING: DO NOT remove block drain plugs or
loosen radiator draincock with system hot and under
pressure because serious burnsfrom coolant can occur.
(3) Drain block.
NOTE: DO NOT WASTE reusable coolant. If solution
is clean, drain coolant into a clean container for reuse.
(4) Remove exhaust pipe.
(5) Tag and disconnect vacuum hoses.
NOTE: Ensure vacuum advance hose is tagged and
disconnected.
(6) If equipped, remove air pump and bracket, and
put aside. Note position of spacers for installation
reference.
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