Chevy Lumina APV Pontiac Trans Sport Oldsmobile Silhouette 3.1L V6 Remanufactured Engine 1990-1994

Featuring an exact 3135cc displacement, this Chevrolet Lumina 3.1L Remanufactured Engine long block restores dependable power to classic GM front-wheel drive platforms. The 6-Cylinder 12-Valve engine cures chronic head gasket leakage and bottom-end bearing knocking. A required trade-off involves purchasing a separate valley pan gasket and pre-lubricating the pushrod tips before initial startup to protect dry rocker arms.

Cast iron engine block casting features identifiers 519, 934, or 653 stamped on the front and left side. Remanufactured aluminum cylinder heads carry casting marks 511, 651, 834, or 696 configured without camshaft sensors. Crated envelope dimensions measure 36in length by 36in width by 36in height with an engine weight of 267 lbs. Rotating components feature crankshaft casting 981, forged steel rods, stamped steel tin oil pan, and a 4.5-quart capacity.

Key Features of Chevrolet 3.1L

Automotive restoration facilities buy Chevrolet 3.1L remanufactured engine assemblies to restore peak road efficiency to classic front-wheel drive vehicles. This long block stops internal oil consumption while balancing rotating forces across all 6 cylinders.

- Cast iron block decks receive CNC resurfacing to Ra 25 finish to ensure gasket clamping
- Diamond plateau cylinder honing creates cross-hatch grooves that seat piston rings within 500 miles
- Crankshaft casting 981 is micro-polished to maintain 0.0003in TIR journal concentricity
- Align-honed main bearing saddles maintain 0.0012in clearance to protect bottom-end bearings under load
- Remanufactured aluminum cylinder heads undergo heat treatment to prevent deck warpage under heat
- Hydraulic lifters and pushrods eliminate valvetrain clicking to maintain factory valve timing
- Multi-angle cut valve seats hold 0.001in concentricity to ensure airtight cylinder compression

Dyno Load Precision Machining Tolerances

Automated dyno testing verifies 140 HP output at 4,800 RPM and 185 ft-lbs torque at 3,600 RPM under continuous run cycles. Machine shop tolerances enforce crankshaft journal runout below 0.0003in TIR and connecting rod bearing oil clearances at 0.0012in. Plateau-honed cylinder walls deliver uniform compression between 165 PSI and 170 PSI across all 6 combustion chambers. Hot engine oil pressure measures 50 PSI at 2,500 RPM while regulated coolant operating temperatures maintain 195°F to confirm cooling jacket flow integrity before crate sealing.

Vehicle Fitment Drivetrain Guide

This remanufactured long block fits 1990 to 1994 Buick Regal, Chevrolet Corsica, Beretta, Cavalier, Lumina, Pontiac Sunbird, Tempest, Grand Prix, and Trans Sport models with the 3.1L V6 engine and VIN code T. Mates to front-wheel drive 3-Speed or 4-Speed Automatic transaxles. Fitment warning: this unit features a tin stamped steel oil pan and no camshaft sensor. It does not fit cast aluminum oil pan models, 3.4L engines, or rear-wheel drive platforms.

Installation Protocol Service Schedules

Source a new intake valley pan gasket before installation and torque intake manifold bolts to factory specifications. Flush heater cores and radiator passages to remove corrosion deposits before turning the key. Warning: do not install this non-turbo long block into forced induction applications exceeding 5 PSI of boost without forged internal pistons.

- 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, tin oil pan, front timing cover, and installation manuals.