Chrysler RAM TRUCK 2500 1994 Service Manual page 824

o r 0.254 mm (0.010 inch) overall across head. I f e x ­
ceeded, either replace
h e a d o r
lightly machine the
head surface.
The cylinder
h e a d
surface
f i n i s h
should
b e
1.78-4.57 microns (70-180 microinches).
Inspect push
r o d s .
Replace worn or bent rods.
INSTALLATION
(1) Position
t h e n e w
cylinder
h e a d
gaskets
o n t o t h e
cylinder block.
(2) Position the cylinder heads
o n t o
head gaskets
and cylinder block.
(3) Tighten t h e cylinder head bolts in two steps
(Fig. 7):
• Step 1—Tighten all cylinder
h e a d
bolts,
i n
se­
quence, to 58 N-m (43 ft. lbs.) torque.
• Step 2—Tighten all cylinder head bolts, i n se­
quence, to 143 N-m (105 ft. lbs.) torque.
CYLINDER HEAD
© T©
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®i M © ©
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@
J9409-14
Fig. 7 Cylinder Head Bolt Tightening Sequence
CAUTION: When tightening the rocker arm bolts,
make sure the piston in that cylinder is NOT at
T D C . Contact between the valves and piston could
occur.
(4) Install push rods and rocker arm assemblies i n
their original position. Tighten the bolts to 28 N-m
(21 ft. lbs.) torque.
(5) Install the side intake manifold gaskets. Be
sure that the locator dowels are positioned i n the
head (Fig. 8).
•INTAKE MANIFOLD GASKETS^
LOCATOR DOWELS''
J9409-64
Fig. 8 Intake Manifold Flange Gasket Alignment
(6) Insert dowels into cylinder block locator holes.
Peel off the protective paper (blue - rear and brown -
front) and press firmly onto the block (Fig. 9).
INTAKE MANiroLD-TO-BLOCK SEALS (FRONT)
(BROWN PEEL-OFF)
INTAKE MANIFOLD-TO-BLOCK SEALS (REAR)"
(BLUE PEEL-OFF) J9409-63
Fig. 9 Intake Manifold-to-Block Seals and Locator
Dowel Holes
(7) Apply Mopar Silicone Rubber Adhesive Sealant,
or equivalent, into the four corner spaces (Fig. 10).
Fill the pocket, but DO NOT overfill.
INTAKE MANIFOLD
GASKET
SEALANT
J9409-65
Fig. 10 Mopar Silicone Rubber Adhesive Sealant
Application Locations
(8) The lower intake manifold MUST be installed
within 3 minutes of sealant application. Carefully
lower intake manifold into position on the cylinder
block and cylinder heads. After intake manifold is i n
place, inspect to make sure seals and gaskets are in
place.
(9) Tighten the lower intake manifold bolts to 54
N-m (40 ft. lbs.) torque.