Fabricate Alignment Dowels; Alignment Dowel Locations - Jeep Wrangler 1997 Manual

TJ
REMOVAL AND INSTALLATION (Continued)
(10) Remove the fuel lines and vacuum advance
hose.
(11) Remove the intake and engine exhaust mani-
folds from the engine cylinder' head (refer to Group
11, Exhaust System and Intake Manifold for the
proper procedures) .
(12) Disconnect the ignition wires and remove the
spark plugs .
(13) Disconnect the temperature sending unit wire
connector.
(14) Remove the ignition coil and bracket assem-
bly.
(15) Remove the engine cylinder head bolts.
(16) Remove the engine cylinder head and gasket
(Fig . 28) .
(17) If this was the first time the bolts were
removed, put a paint dab on the top of the bolt . If the
bolts have a paint dab on the top of the bolt or it
isn't known if they were used before, discard the
bolts .
(18) Stuff clean lint free shop towels into the cyl-
inder bores .
PUSH
ROD
HEAD
GASKET
BRIDGE
PIVOT ASM.
ROCKER ARM
Fig. 28 Engine Cylinder Head Assembly
CYLINDER
HEAD
J9109-164
INSTALLATION
The engine cylinder head gasket is a composition
gasket . The gasket is to be installed DRY DO NOT
use a gasket sealing compound on the gasket .
If the engine cylinder head is to be replaced and
the original valves used, measure the valve stem
diameter. Only standard size valves can be used with
a service replacement engine cylinder head unless
the replacement head valve stem guide bores are
reamed
to
accommodate oversize valve
stems .
Remove all carbon buildup and reface the valves .
(1) Fabricate two engine cylinder head alignment
dowels from used head bolts (Fig. 29) . Use the long-
est head bolt . Cut the head of the bolt off below the
hex head . Then cut a slot in the top of the dowel to
allow easier removal with a screwdriver .
SLOT
ALIGNMENT
DOWEL
USED
CYLINDER
HEAD
BOLT
2 .51 . ENGINE
9-33
Fig. 29 Fabricate Alignment Dowels
J9009-13
(2)
Install one dowel in bolt hole No.10 and the
other dowel in bolt hole No.8 (Fig. 30) .
Fig. 30 Alignment Dowel Locations
(3) Remove the shop towels from the cylinder
bores. Coat the bores with clean engine oil .
(4) Place the engine cylinder head gasket (with the
numbers facing up) over the dowels.
(5) Place the engine cylinder head over the dowels .
CAUTION: Engine cylinder head bolts should be
reused only once . Replace the head bolts if they
were used before or if they have a paint dab on the
top of the bolt.
(6)
Coat the threads of bolt No .7, only, with Loctite
PST sealant or equivalent.
(7) Install all head bolts, except No .8 and No.10 .
(8) Remove the dowels .
(9) Install No.8 and No.10 head bolts .
CAUTION: During the final tightening sequence,
bolt No.7 will be tightened to a lower torque than
the rest of the bolts. DO NOT overtighten bolt No.7 .
(10) Tighten the engine cylinder head bolts in
sequence according to the following procedure (Fig.
31) :
(a) Tighten all bolts in sequence (1 through 10)
to 30 N-m (22 ft. lbs .) torque .