New Product Information

The purpose of New Product information is to highlight or indicate important product changes from the previous model year.
Changes may include one or more of the following items:
- Torque values and/or fastener tightening strategies
- Changed engine specifications
- New sealants and/or adhesives
- Disassembly and assembly procedure revisions
- Engine mechanical diagnostic procedure revisions
- New special Tools Required
- A component comparison from the previous year


Torque Values and/or Fastener Tightening Strategies
- The torque value for the oil level indicator tube bolt has been increased to 25 Nm (18 ft. lbs.).
- The torque value for the oil level sensor has been reduced to 20 Nm (15 ft. lbs.).
- The torque value for the intake manifold (final pass) has been increased to 10 Nm (89 inch lbs.).
- Torque values for the engine wire harness clip bolt and engine ground strap bolt have been added.
- Torque values for the vapor vent pipe studs have been added.
- The new service thread repair tools and service procedures are identified.

Changed Engine Specifications
The cylinder bore taper specification has been increased.
For changes to component specifications, refer to Engine Specifications.

New Sealants and/or Adhesives
- No sealant or adhesive changes from the previous year.

Disassembly and Assembly Procedure Revisions
- Water pump design changes do not permit removal and installation of the drive belt pulley.
- The vapor vent pipe is now retained by two bolts and two studs.
The two vapor vent pipe studs are mounted to the front of the engine. The right front stud provides a mounting point for the Positive Crankcase Ventilation (PCV) system.

Engine Mechanical Diagnostic Procedure Revisions
Base Engine Misfire, Valve Train, and other diagnostic information is now provided in table form. Potential or probable causes are supplied for each specific concern.

New Special Tools Required
- The proper thread repair procedures for aluminum cylinder blocks and cylinder heads have been added.
- Oil pressure testing tool J 42907 has been developed to aid in on-vehicle oil pressure testing.

A Component Comparison from the Previous Year
- The water pump drive belt pulley is now pressed onto the pump shaft and is not serviceable separately.
- Aluminum carrier/silicone bead type gaskets now provide sealing between the water pump and the engine block surfaces.
Do not substitute the earlier design paper gasket for the aluminum carrier type. Water pump pulley and accessory drive belt position will be affected.
- The valve rocker arm cover and cylinder head designs have changed. The rocker covers are retained to the cylinder heads by four center mounted rocker cover bolts.
- The ignition coils no longer bolt directly to the valve rocker arm covers. The coils are mounted to a coil mounting bracket and the bracket is retained to the cover by bolts.
- Refer to Engine Component Description.