Jeep Liberty KJ. Manual — part 912
VM.1085 CAMSHAFT LOCKING TOOL
VM.9545 RETURN FUEL QUANTITY VIALS
VM.9095 CRANKSHAFT SUPPORT RETAINER
VM.9660 TIMING BELT TENSIONER WRENCH
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ENGINE - 2.8L DIESEL
KJ
HEAD-CYLINDER
DESCRIPTION
The 2.8L aluminum, overhead valve cylinder head (1)
has different dimensions for the intake air and a bias
relief port. The cylinder head itself is not resurfacable.
The cylinder head uses a selectable Multi-layered
Steel gasket that is available in three sizes.
STANDARD PROCEDURE
VALVE SEALS - IN VEHICLE
1. Disconnect the negative battery cable.
2. Remove the intake manifold/cylinder head cover
(Refer to 9 - ENGINE/CYLINDER HEAD/CYLIN-
DER HEAD COVER(S) - REMOVAL).
NOTE: Rocker arms and lifters must be kept in
order of removal and stored in the up right posi-
tion.
3. Position the rocker arms aside. (Refer to 9 -
ENGINE/CYLINDER
HEAD/ROCKER
ARM
/
ADJUSTER ASSY - REMOVAL).
4. Install special tool VM.1072A, compression tester
adaptor , into the injector hole and retain with an
injector hold down (2) bolt.
KJ
ENGINE - 2.8L DIESEL
9 - 1607
5. Prepare special tool MD998772A (1) for usage by
inverting the tool to cylinder head holding screws
so that the thread size matches the cylinder head.
6. Install special tool MD998772A (1) onto cylinder
head and using adaptor MD998772A-15 (2), place
the adaptor over the valve spring.
7. Connect a regulated air supply (3) to VM.1072A
(4), and pressurize the cylinder.
8. Place shop towels around the working area of the
cylinder head to prevent valve locks from acci-
dently entering the engine.
9. Using adaptor MD998772A-15 (1), collapse the
valve spring (2) and remove the locks.
10. Remove the valve spring (2) assembly.
11. Remove the valve seal.
12. Repeat this procedure for all cylinders.
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ENGINE - 2.8L DIESEL
KJ
STANDARD PROCEDURE - MEASURING PISTON PROTRUSION
CAUTION: DO NOT Rotate the engine with the cylinder head off without first installing the cylinder liner
retainers VM.1076. Failure to do so may result in the cylinder liner moving and a false piston protrusion
reading. A false piston protrusion reading may result in a wrong cylinder head gasket selection.
1. Use special tool VM.1010 dial indicator (1) with
special tool VM.1013 (3).
2. Bring the piston of cylinder number 1 exactly to top
dead center.
3. Lay the straight edge special tool VM.1013 (3)
across the cylinder sleeve and zero the dial indica-
tor (1) on the cylinder block surface (4).
4. Lay the straight edge special tool VM.1010 across
the cylinder sleeve, setup the dial indicator on the
piston crown (above the center of the piston pin)
5mm (1/8 in.) from the edge of the piston and note
the measurement.
NOTE: Install the cylinder liner retainers VM.1076
before rotating the engine.
5. Repeat the procedure with the rest of the cylinders.
6. Establish the thickness of the steel gasket by aver-
aging the four piston protrusion readings.
Measure Dimension (mm)
0.460-0.609
Cylinder Head Gasket Thickness (mm)
1.32
No Holes or Notches
Piston Clearance (mm)
0.71-0.86
Measure Dimension (mm)
0.610-0.709
Cylinder Head Gasket Thickness (mm)
1.42
1 Hole or Notch
Piston Clearance (mm)
0.711-0.81
Measure Dimension (mm)
0.710-0.810
KJ
ENGINE - 2.8L DIESEL
9 - 1609
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