OIL PUMP ASSEMBLY
(1) Assemble pump, using new parts as required.
(2) Tighten cover screws to 12 N·m (105 in. lbs.).
(3) Prime oil pump before installation by filling
rotor cavity with engine oil.
(4) If oil pressure is low and pump is within spec-
ifications, inspect for worn engine bearings or other
reasons for oil pressure loss.
CYLINDER BLOCK AND BORE
CLEANING AND INSPECTION
(1) Clean cylinder block thoroughly and check all
core hole plugs for evidence of leaking.
(2) If new core plugs are installed, refer to Service
Procedures, Engine Core Plugs.
(3) Examine block for cracks or fractures.
(4) Inspect for damaged bolt threads. Repair
threads as needed. Refer to Service Procedures,
Repair of Damaged or Worn Threads.
NOTE: Refer to Honing Cylinder Bores in the Stan-
dard Service Procedures for specification and pro-
cedures.
(5) After a cylinder honing or deglazing procedure:
(a) Clean bores with soap and water solution.
(b) Thoroughly rinse cylinder bores with clean
water to remove soap/water solution and wipe
bores dry with a clean lint-free cloth.
(c) Oil the bores after cleaning to prevent rust-
ing.
CYLINDER BORE INSPECTION
The cylinder walls should be checked for out-of-
round and taper with Tool C-119 as shown in (Fig.
117).
Measure the cylinder bore at three levels in direc-
tions A and B (Fig. 117). Top measurement should be
12 mm (0.50 inch.) down and bottom measurement
should be 12 mm (0.50 inch.) up from bottom of bore.
Refer to Engine Specifications.
NOTE: There are no service procedures to bore the
cylinder bores for installation of oversized pistons.
ENGINE HYDRO-MOUNT ISOLATOR
Engine hydro-mounts may show surface cracks.
This will not effect performance and mount should
not be replaced. Only replace the engine hydro-
mounts when leaking fluid:
• Driveshaft diagnosis. Refer to DIFFERENTIAL
AND DRIVELINE.
• Any front end structural damage (after repair).
• Isolator replacement.
TIMING DRIVE SYSTEM
INSPECTION
For checking timing drive system wear limits, use
the following procedure.
(1) Remove right cylinder head cover.
(2) Viewing through the cylinder head timing drive
cavity, inspect the primary chain tensioner plunger.
Rotate the engine clockwise to remove any chain
slack and to achieve the maximum tensioner exten-
Fig. 116 Measuring Clearance Over Rotors
1 – STRAIGHT EDGE
2 – FEELER GAUGE
Fig. 117 Cylinder Bore Size Checking
9 - 66 2.7L ENGINE LH
CLEANING AND INSPECTION (Continued)
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