Jeep Liberty KJ. Manual — part 930
TIMING-VALVE
STANDARD PROCEDURE - LOCKING ENGINE 90 DEGREES AFTER TDC
1. Disconnect negative battery cable.
NOTE: Rotate the engine by the front crankshaft bolt until the line next to the bolt in the front crankshaft
hub reaches 12 oclock. Rotate the engine another 1/4 turn to the right, or the three oclock position. This will
assist approximating the location of 90 degrees ATDC.
2. Rotate engine by hand until special tool VM 1080 can be install through the engine access hole, locking the flex
plate and preventing crankshaft movement. This locks the engine at 90° after TDC.
3. Remove engine cover (Refer to 9 - ENGINE
COVER - REMOVAL).
4. Remove EGR valve and EGR cooler to exhaust
manifold retaining nuts.
5. Reposition EGR valve assembly out of way.
6. Remove
plug
in
cylinder
head
cover/intake
manifold.
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ENGINE - 2.8L DIESEL
KJ
7.
Insert VM.1053 to lock exhaust camshaft in posi-
tion.
8. Remove generator (Refer to 8 - ELECTRICAL/
CHARGING/GENERATOR - REMOVAL).
9. Remove plug in cylinder head cover/intake mani-
fold.
10. Insert
VM.1052
to
lock
intake
camshaft
in
position.
11. At this point the timing belt can be removed for
service.
12. After engine service is completed and timing belt
reinstalled, remove both camshaft locking pins
from cylinder head cover/intake manifold.
13. Install both camshaft access plugs.
14. Remove 90° after TDC engine locking pin.
15. Install generator (Refer to 8 - ELECTRICAL/
CHARGING/GENERATOR - INSTALLATION).
16. Install engine cover (Refer to 9 - ENGINE COVER
- INSTALLATION).
17. Connect negative battery cable.
KJ
ENGINE - 2.8L DIESEL
9 - 1679
SHAFT-BALANCE
DESCRIPTION
The 2.8L Common Rail Diesel engine is equipped with two gear driven nodular cast iron balance shafts in a cast
aluminum carrier. The balance shaft assembly is gear driven by the crankshaft and used to counteract engine vibra-
tion..
OPERATION
The balance shaft assembly includes four balancers on two shafts. The balance shafts are connected by helical
gears, and the assembly is timed with the engine. The dual-counter rotating shafts rotate at twice the engine speed
and decrease second order vertical shaking forces caused by component movement. Balance shaft oiling is pro-
vided through oil passages in the crankshaft carriers.
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ENGINE - 2.8L DIESEL
KJ
REMOVAL
1. Disconnect negative battery cable.
2. Raise vehicle on hoist.
3. Remove oil pan (Refer to 9 - ENGINE/LUBRICA-
TION/OIL PAN - REMOVAL).
4. Remove oil pump pickup tube (Refer to 9 -
ENGINE/LUBRICATION/OIL PUMP - REMOVAL).
5. Remove
balance
shaft
assembly
and
discard
O-rings on the central carrier pins.
INSTALLATION
CAUTION: Install new O-rings on the carrier pins and oil pick up tube before assembly.
NOTE: Before installation of the balance shaft assembly, the # 1 cylinder must be brought to TDC, or the 12
O’clock position. There is a line on the front of the crankshaft hub, next to the front crankshaft bolt, that
may assist the alignment.
1.
Remove the vibration damper and roll engine over by hand until the witness line on the front of the crankshaft
hub is at the 12 O’clock, or TDC position. Once the # 1 cylinder is brought to TDC, the balance shaft assembly
can be installed.
CAUTION: CARE MUST BE TAKEN DURING THE
INSTALLATION OF THE DRIFT OR PUNCH. THE
BACK SIDE OF THE COUNTER WEIGHTS ON THE
BALANCE SHAFTS MUST BE IN THE UP POSITION
BEFORE INSERTING THE TOOL INTO THE HOUS-
ING.
2. With balance shaft assembly on work bench. Insert
a drift of a punch into balance shaft assembly
alignment hole. This will ensure proper balance
shaft to crankshaft timing after assembly.
3. Install the new crankshaft carrier pin O-rings, bal-
ance shaft assembly and retaining bolts. Torque
bolts to 32.4N·m (24 ft. lbs.).
4. Install oil pump pickup tube with new seals (Refer to 9 - ENGINE/LUBRICATION/OIL PUMP - INSTALLATION).
5. Install oil pan (Refer to 9 - ENGINE/LUBRICATION/OIL PAN - INSTALLATION).
KJ
ENGINE - 2.8L DIESEL
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