Buick Chevrolet Pontiac 3.1L V6 Remanufactured Engine 2000-2002

Description

Featuring an exact 3.1L displacement, this Chevrolet Malibu 3.1L Remanufactured Engine restores factory efficiency to high-volume passenger cars. The 6-Cylinder 12-Valve OHV design cures chronic lower intake manifold coolant erosion issues. A mandatory trade-off requires torquing the lower intake manifold with updated aluminum-framed gaskets to prevent coolant intrusion into lifter galleys on initial heat cycling.

Cast iron engine block casting carries designations 089, 093, 737, 150, or 227 located on the driver side. Iron cylinder heads feature casting numbers 170 or 487 with secondary SMOG holes machined over 2 exhaust ports on each bank. Crated envelope dimensions measure 36in length by 36in width by 36in height with a net dry weight of 267 lbs. Rotating components include crank casting 981 or 268, connecting rods, and a 4.5-quart oil pan.

Key Features of Chevrolet 3.1L

Automotive technicians buy Chevrolet 3.1L remanufactured engine long blocks to restore dependable commuter service to aging midsize sedans. This replacement resolves internal coolant cross-contamination and restores balanced cylinder compression.

• Precision CNC block resurfacing establishes an Ra 25 finish to prevent cylinder head gasket failures
• Diamond plateau cylinder honing creates uniform oil retention cross-hatching that seats rings within 500 miles
• Crankshaft casting 981 or 268 is micro-polished to hold 0.0003in TIR journal concentricity
• Align-honed main bearing saddles maintain 0.0012in oil clearance to protect bottom-end bearings under load
• Cylinder head casting 170 or 487 features dedicated air injection SMOG ports over exhaust runners
• Reconditioned pushrods and hydraulic roller lifters eliminate valvetrain clatter and maintain valve lift
• Rebuilt 12-Valve cylinder heads feature precision valve seat cutting holding 0.001in concentricity for seal

Dyno Load Precision Machining Tolerances

Dynamometer bench validation confirms 175 HP output at 5,200 RPM and 195 ft-lbs torque at 4,000 RPM under loaded run testing. Machining processes hold crankshaft journal runout at 0.0003in TIR while rod bearing oil clearances measure an exact 0.0012in. Plateau-honed cylinders produce uniform compression between 175 PSI and 180 PSI across all 6 combustion chambers. Hot engine oil pressure maintains 50 PSI at 2,500 RPM while regulated coolant operating temperatures stabilize at 195°F during full load machine cycles.

Vehicle Fitment Drivetrain Guide

This remanufactured long block fits 2000 to 2002 Buick Century, Chevrolet Malibu, Chevrolet Lumina, and Pontiac Grand Prix models equipped with the 3.1L 3135cc V6 engine and VIN code J. Matches front-wheel drive transaxles running 4-Speed Automatic 4T65E or 4T40E units. Application notice: this engine features air injection SMOG holes above 2 exhaust ports per head. It does not fit non-SMOG 3.1L engines, larger 3.4L applications, or rear-wheel drive platforms.

Installation Protocol Service Schedules

Install upgraded metal-backed lower intake manifold gaskets and torque fasteners in 3 steps to prevent manifold deformation. Flush cooling lines and heater core passages to eliminate residual acidic coolant before starting. Never operate this non-turbo long block with dry nitrous oxide systems exceeding 50 HP without installing supplemental enrichment fuel solenoids.

• Add 4.5 quarts of SAE 5W-30 break-in motor oil before cranking the starter motor
• Drain break-in lubricant and install a new spin-on oil filter after 500 miles
• Perform ongoing oil and filter service every 3,000 miles or 5,000 miles

Warranty Terms Core Return Policy

Every remanufactured GM engine includes our 3-Year Unlimited-Mile parts warranty for complete commercial and personal peace of mind. We provide prepaid freight pickup for your rebuildable core block within an authorized 30-day window. Crated delivery contains the long block, oil pan, front timing cover, valve covers, and installation manuals.