Jeep 1997 Grand Cherokee Service Manual page 1599

ZG
4.0L ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.2L ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . 55
5.9L ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . 89
GENERAL INFORMATION
ENGINE OIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
ENGINE PERFORMANCE . . . . . . . . . . . . . . . . . 2
FORM-IN-PLACE GASKETS-GASOLINE
ENGINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
HONING CYLINDER BORES . . . . . . . . . . . . . . . 2
GENERAL INFORMATION
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 material 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 in leakage, while
too much can result in 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 in the engine area (Mopar
Adhesive Sealant and Mopar Gasket Maker). Each
has different properties and they cannot be used
interchangeably.
MOPAR SILICONE RUBBER ADHESIVE
SEALANT
Mopar Silicone Rubber Adhesive Sealant, nor-
mally black in color, is available in both three ounce
tubes and four and one-half ounce power tubes. Mois-
ture in the air causes the sealant material to cure.
This material is normally used on flexible metal
flanges. The regular tubes have a shelf life of one
year and the power tubes a two year shelf life, and
ENGINE
CONTENTS
STANDARD SERVICE INFORMATION
Silicone Rubber
page
ENGINE DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . 8
STANDARD SERVICE INFORMATION
INDEX
page
HYDROSTATIC LOCK
MEASURING WITH PLASTIGAGE . . . . . . . . . . . 3
REPAIR DAMAGED OR WORN THREADS . . . . . 4
SERVICE ENGINE ASSEMBLY
(SHORT BLOCK) . . . . . . . . . . . . . . . . . . . . . . . 4
will not properly cure if over-aged. Always inspect
the package for the expiration date before use.
MOPAR GASKET MAKER
Mopar Gasket Maker, normally red in color, is
available in six-cc tubes. This anaerobic type gasket
material cures in the absence of air when squeezed
between smooth machined metallic surfaces. It will
not cure if left in the uncovered tube. DO NOT use
on flexible metal flanges.
SURFACE PREPARATION
Parts assembled with form-in-place gaskets may be
disassembled
instances, it 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
that gasket rails are flat. Flatten rails with a ham-
mer on a flat plate, if required. Gasket surfaces must
be free of oil and dirt. Be sure the old gasket mate-
rial is removed from blind attaching holes.
ENGINE
. . . . . . . . . . . . . . . . . . . . 5
without unusual effort.
9 - 1
page
. . . . . . . . 1
page
In some