New Product Information. Chevrolet Chevy P12 Chassis 1998

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 1998 🢒 Chevy P12 Chassis 🢒 Engine 🢒 Engine Mechanical - 7.4L 🢒 New Product Information

The purpose of New Product Information is to highlight important technical 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

•	Cylinder head bolts now apply a torque angle strategy.

•	Certain fasteners should not be reused. Bolts, studs, or other fasteners that must be replaced will be called out in the specific service procedure. Refer to Fastener Tightening Specifications and Engine Mechanical Specifications .

•	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.

•	The 7.4L L21engine was new for 1998. The new features include a distributorless ignition system:

-	Crankshaft sensor

-	Camshaft sensor

-	Eight individual ignition coils

•	Refer to Disassembled Views and Engine Component Description .