Page 99 of GM Goodwrench Engines Catalog by GM Goodwrench

GOODWRENCH SERVICE REPLACEMENT ENGINES Section V Page 98 August 2004 88893274 262 CID New 4.3L 1996-2000 Chevrolet, GMC, T1 (L35) Oldsmobile 1996-2000 Chevrolet, GMC LM1 (L35) Engine-Specific Content: Oil Pan, Oil Filter, Front Cover, and Valve Rocker Covers Notes: When replacing a 1998 and prior engine, also use 1-12557587 flywheel for A. Trans or 1-12557586 flywheel for M. Trans. Also needs Pilot Bearing 12557583. Replaces: 12456499 Replaced By: 89017333 INSTALLATION INSTRUCTIONS Instruct customer that the first service interval including an oil and filter change should be between 300 and 500 miles. Replacement of oil related parts: If the original engine failed either catastrophically or due to bearing failure, the engine oil cooler MUST BE REPLACED and the oil lines and remote filter adapter MUST BE REMOVED from the vehicle and thoroughly flushed or replaced. Ingestion of fibers and grit from conditioning pads (i.e. Scotch Brite) is the number one cause of 4.3L engine failure. Intake Manifold: For some engine assemblies (see service manual), sealer (part number 12346004) or equivalent MUST BE APPLIED to lower intake manifold bolts when installing the lower intake manifold. Failure to do so will usually result in increased oil consumption by allowing oil from the engine valley to be drawn into the intake manifold plenum. Since the plenum drain holes empty into cylinder #3 and #4, oil fouling will be greater on the spark plugs in these cylinders. Front Covers: 4.3 blocks with ten-bolt front cover provisions accept either ten-bolt metal covers or, after removing dowel pins, accept six-bolt plastic covers. On OBD II equipped engines, reluctor ring must also be transferred. CAUTION: The oil pump in this engine must be primed before starting engine. DAMAGE WILL RESULT IF ENGINE IS STARTED WITHOUT OIL OR IF OIL PUMP IS NOT PRIMED.

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