The water pump on all models can be replaced without
discharging the air conditioning system.
WARNING: Do not remove pressure cap with the
system hot and under pressure because serious
burns from coolant can occur.
1. Drain cooling system (Refer to 7 - COOLING -
2. Remove accessory drive belts (Refer to 7 - COOLING/
ACCESSORY DRIVE/DRIVE BELTS -
NOTE: The water pump is driven by the timing
3. Remove engine timing belt (Refer to 9 - ENGINE/
VALVE TIMING/TIMING BELT/CHAIN AND SPROCKETS - REMOVAL).
4. Remove water pump mounting bolts (1). Note position of longer bolts for proper re-installation.
5. Remove water pump body (2) from engine.
TENSIONER PULLEY ASSEMBLY
NOTE: The tensioner pulley (1), bracket (3), and
pivot bolt (2) is serviced as an assembly.
1. Inspect pulley (1) for free movement. Replace if
pulley is loose, seized, or rough turning.
2. Inspect pulley bearing and seal. Replace if damaged.
3. Inspect pivot bolt (2) for free movement in assembly
housing. Replace assembly if seized or excessive
CAUTION: The 3.5L is NOT a freewheeling engine. Therefore, loosen the valve train rocker assemblies
before servicing the timing drive.
1. Perform fuel pressure release procedure. (Refer to 14 - FUEL SYSTEM/FUEL DELIVERY - STANDARD PROCEDURE).
2. Disconnect negative battery cable.
3. Remove both cylinder head covers and loosen the rocker arm assemblies (Refer to 9 - ENGINE/CYLINDER
HEAD/ROCKER ARM / ADJUSTER ASSY - REMOVAL).
4. Remove the front timing belt cover (Refer to 9 - ENGINE/VALVE TIMING/TIMING BELT / CHAIN COVER(S) -
5. Mark belt running direction, if timing belt is to be reused.
CAUTION: When aligning timing marks, always rotate engine by turning the crankshaft. Failure to do so will
result in valve and/or piston damage.
6. Rotate engine clockwise until crankshaft (10) mark aligns with the TDC mark on oil pump housing (9) and the
camshaft sprocket (2, 7) timing marks (1, 8) are aligned with the marks on the rear cover.
7. Remove the timing belt tensioner (12) and remove timing belt.
TIMING GEAR ALIGNMENT
1 - RIGHT CAMSHAFT GEAR ALIGNMENT MARK 7 - LEFT CAMSHAFT GEAR
2 - RIGHT CAMSHAFT GEAR 8 - LEFT CAMSHAFT GEAR ALIGNMENT MARK
3 - CYLINDER HEAD TO INNER TIMING BELT COVER BOLTS -
9 - CRANKSHAFT GEAR ALIGNMENT MARK
4 - TIMING BELT 10 - CRANKSHAFT GEAR
5 - WATER PUMP PULLEY 11 - TIMING BELT TENSIONER PULLEY
6 - CYLINDER HEAD TO INNER TIMING BELT COVER BOLTS -
12 - TIMING BELT TENSIONER
9 - 2274 ENGINE - 3.5L - SERVICE INFORMATION LX
8. Inspect the tensioner for fluid leakage.
9. Inspect the pivot and bolt for free movement, bearing grease leakage, and smooth rotation. If not rotating freely,
replace the arm and pulley assembly.
10. When tensioner is removed from the engine it is
necessary to compress the plunger into the tensioner
CAUTION: Index the tensioner in the vise the same
way it is installed on the engine. This ensures
proper pin orientation when tensioner is installed
on the engine.
a. Place the tensioner into a vise (1) and
SLOWLY compress the plunger. Total bleed
down of tensioner should take about 5 minutes.
b. When plunger is compressed into the tensioner
body install a pin (2) through the body and
plunger to retain plunger in place until tensioner
CAUTION: The 3.5L engine is NOT a free-wheeling
design. Therefore, care should be taken not to
rotate the camshafts or crankshaft with the timing
NOTE: The camshaft timing gears are keyed to the
1. Perform fuel pressure release procedure. (Refer to
14 - FUEL SYSTEM/FUEL DELIVERY - STANDARD
2. Remove front timing belt cover (Refer to 9 -
ENGINE/VALVE TIMING/TIMING BELT / CHAIN
COVER(S) - REMOVAL).
3. Position crankshaft sprocket to the TDC mark on
the oil pump housing by turning crankshaft in the
4. Install a dial indicator in number 1 cylinder to check TDC of the piston. Rotate the crankshaft until the piston is
at exactly TDC.
5. Remove camshaft retainer/thrust plate (1) from rear of right cylinder head.
6. Remove the right cylinder head cover.
7. Remove the right rocker arm assembly.
8. Remove the timing belt tensioner and timing belt.