Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Dodge Durango 1998-2000 Approved Dodge Durango 1998-99 98DN_9
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DN ENGINE 9-1
ENGINE
CONTENTS
page page
3.9L ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 ENGINE DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . . 7
5.2L ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 STANDARD SERVICE INFORMATION . . . . . . . . . . 1
5.9L ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
STANDARD SERVICE INFORMATION
INDEX
page page
GENERAL INFORMATION HONING CYLINDER BORES . . . . . . . . . . . . . . . . 5
ENGINE OIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 HYDROSTATIC LOCK . . . . . . . . . . . . . . . . . . . . . 6
ENGINE PERFORMANCE . . . . . . . . . . . . . . . . . . 2 MEASURING WITH PLASTIGAGE . . . . . . . . . . . . 2
FORM-IN-PLACE GASKETS . . . . . . . . . . . . . . . . . 1 REPAIR DAMAGED OR WORN THREADS . . . . . . 5
GENERAL INFORMATION MOPAR GASKET MAKER
Mopar Gasket Maker, normally red in color, is
FORM-IN-PLACE GASKETS available in 6 cc tubes. This anaerobic type gasket
There are several places where form-in-place gas- material cures in the absence of air when squeezed
kets are used on the engine. DO NOT use form-in- between smooth machined metallic surfaces. It will
place gasket material unless specified. Care not cure if left in the uncovered tube. DO NOT use
must be taken when applying form-in-place gaskets. on flexible metal flanges.
Bead size, continuity and location are of great impor-
tance. Too thin a bead can result in leakage while too SURFACE PREPARATION
much can result in spill-over. A continuous bead of Parts assembled with form-in-place gaskets may be
the proper width is essential to obtain a leak-free disassembled without unusual effort. In some
joint. instances, it may be necessary to lightly tap the part
Two types of form-in-place gasket materials are with a mallet or other suitable tool to break the seal
used in the engine area (Mopar Silicone Rubber between the mating surfaces. A flat gasket scraper
Adhesive Sealant and Mopar Gasket Maker). Each may also be lightly tapped into the joint but care
have different properties and cannot be used inter- must be taken not to damage the mating surfaces.
changeably. Scrape or wire brush all gasket surfaces to remove
all loose material. Inspect stamped parts to ensure
MOPAR SILICONE RUBBER ADHESIVE gasket rails are flat. Flatten rails with a hammer on
SEALANT a flat plate, if required. Gasket surfaces must be free
Mopar Silicone Rubber Adhesive Sealant, normally of oil and dirt. Make sure the old gasket material is
black in color, is available in 3 ounce tubes. Moisture removed from blind attaching holes.
in the air causes the sealant material to cure. This
material is normally used on flexible metal flanges. GASKET APPLICATION
It has a shelf life of a year and will not properly cure Assembling parts using a form-in-place gasket
if over aged. Always inspect the package for the expi- requires care.
ration date before use. Mopar Silicone Rubber Adhesive Sealant should be
applied in a continuous bead approximately 3 mm
(0.12 inch) in diameter. All mounting holes must be
circled. For corner sealing, a 3 or 6 mm (1/8 or 1/4
9-2 ENGINE DN
GENERAL INFORMATION (Continued)
inch) drop is placed in the center of the gasket con- ing is the recommended procedure for the use of
tact area. Uncured sealant may be removed with a Plastigage:
shop towel. Components should be torqued in place (1) Remove oil film from surface to be checked.
while the sealant is still wet to the touch (within 10 Plastigage is soluble in oil.
minutes). The use of a locating dowel is recom- (2) The total clearance of the main bearings can be
mended during assembly to prevent smearing the determined only by removing the weight of the
material off location. crankshaft. This can be accomplished by either of two
Mopar Gasket Maker should be applied sparingly methods:
to one gasket surface. The sealant diameter should
be 1.00 mm (0.04 inch) or less. Be certain the mate- METHOD - 1 (PREFERRED)
rial surrounds each mounting hole. Excess material Shim the bearings adjacent to the bearing to be
can easily be wiped off. Components should be checked. This will remove the clearance between
torqued in place within 15 minutes. The use of a upper bearing shell and the crankshaft. Place a min-
locating dowel is recommended during assembly to imum of 0.254 mm (0.010 in.) shim between the bear-
prevent smearing the material off location. ing shell and the adjacent bearing cap. Tighten the
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