Chrysler RAM TRUCK 2500 1994 Service Manual page 722

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E N G I N E S
ENGINES 9 - 1
C O N T E N T S
page
3.9L ENGINE SERVICE PROCEDURES 17
5.2L ENGINE SERVICE PROCEDURES 44
5.9L (DIESEL) ENGINE SERVICE
PROCEDURES 123
page
5.9L ENGINE SERVICE PROCEDURES 71
8.0L ENGINE SERVICE PROCEDURES 97
ENGINE DIAGNOSIS 5
STANDARD SERVICE PROCEDURES 1
STANDARD S E R V I C E P R O C E D U R E S
INDEX
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Engine Performance (Gasoline Engines) 2
Form-ln-Place Gaskets (Gasoline Engines) 1
Honing Cylinder Bores 2
FORM-IN-PLACE GASKETS (GASOLINE ENGINES)
There are several places where form-in-place gas­
kets are used on the engine. DO NOT use form-in-
place gasket m a t e r i a l unless specified. Care
must be taken when applying form-in-place gaskets.
Bead size, continuity and location are of great impor­
tance. Too thin a bead can result i n leakage while too
much can result i n spill-over. A continuous bead of
the proper width is essential to obtain a leak-free
joint.
Two types of form-in-place gasket materials are
used i n the engine area (Mopar Silicone Rubber Ad­
hesive Sealant and Mopar Gasket Maker). Each have
different properties and cannot be used interchange­
ably.
MOPAR SILICONE RUBBER A D H E S I V E
S E A L A N T
Mopar Silicone Rubber Adhesive Sealant, normally
black i n color, is available in 3 ounce tubes. Moisture
in the air causes the sealant material to cure. This
material is normally used on flexible metal flanges.
It has a shelf life of 1 year and will not properly cure
if over aged. Always inspect the package for the ex­
piration date before use.
MOPAR GASKET MAKER
Mopar Gasket Maker, normally red i n color, is
available i n 6 cc tubes. This anaerobic type gasket
material cures i n the absence of air when squeezed
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Hydrostatic Lock 4
Measuring with Plastigage 3
Repair Damaged or Worn Threads . . . . . . . . . . . . . 4
between smooth machined metallic surfaces. I t will
not cure i f left i n the uncovered tube. DO NOT use
on flexible metal flanges.
SURFACE PREPARATION
Parts assembled with form-in-place gaskets may be
disassembled without unusual effort. I n some in­
stances, i t may be necessary to lightly tap the part
with a mallet or other suitable tool to break the seal
between the mating surfaces. A flat gasket scraper
may also be lightly tapped into the joint but care
must be taken not to damage the mating surfaces.
Scrape or wire brush all gasket surfaces to remove
all loose material. Inspect stamped parts to ensure
gasket rails are flat. Flatten rails with a hammer on
a flat plate, i f required. Gasket surfaces must be free
of oil and dirt. Make sure the old gasket material is
removed from blind attaching holes.
G A S K E T APPLICATION
Assembling parts using a form-in-place gasket re­
quires care.
Mopar Silicone Rubber Adhesive Sealant should be
applied i n a continuous bead approximately 3 mm
(0.12 inch) i n diameter. A l l mounting holes must be
circled. For corner sealing, a 3 or 6 mm (1/8 or 1/4
inch) drop is placed i n the center of the gasket con­
tact area. Uncured sealant may be removed with a
shop towel. Components should be torqued i n place
while the sealant is still wet to the touch (within 10