Buick Oldsmobile Pontiac 5.7L V8 Remanufactured Engine – 1972-1980

Description

High-nickel cast iron block architecture absorbs extreme combustion pressure spikes while hypereutectic aluminum pistons resist thermal expansion during grueling commercial transport operations in the Oldsmobile Rocket 350 Remanufactured Engine engineered for 1972 to 1980 Buick, Oldsmobile, and Pontiac commercial fleet vehicles. This 16-valve pushrod Rocket V8 platform restores massive low-RPM pulling torque and dependable service.

Cast from high-nickel gray cast iron, this heavy-duty Oldsmobile 350 block features solid main bearing bulkheads that halt bottom-end deflection during heavy commercial hauling. A micro-polished nodular cast iron crankshaft turns within tri-metal bearings, linked to forged steel connecting rods and hypereutectic aluminum pistons with anti-scuff skirt coatings. Decks receive an Ra 35 finish for composite gasket sealing. Dry mass measures 495 lbs with a 5.0-quart capacity stamped steel oil pan.

Key Features of Oldsmobile Rocket 350

Administrative fleet directors buy Oldsmobile Rocket 350 remanufactured engine packages to keep classic municipal service trucks and executive sedans operating on strict schedules. Every remanufactured long block undergoes vacuum decay testing to guarantee total fluid circuit separation before crate departure.

• Cast iron cylinder heads feature large intake valves to optimize cylinder airflow charge velocity
• In-block hydraulic flat-tappet camshaft profiles maximize low-end pulling torque across highway transit
• 0.0012 to 0.0020 inch main bearing clearances maintain solid hydrodynamic lubrication film strength
• Multi-layer steel cylinder head gaskets maintain combustion seals across extreme summer transit heat
• High-flow internal gear-type oil pumps channel pressurized lubricant to overhead pushrods and rocker arms
• Induction-hardened valve seats prevent valve face recession during continuous commercial fleet operation
• Precision rotating package balancing protects Oldsmobile Rocket 350 driveline parts from vibration

Rocket 350 Operational Combustion Limits

Operating lubricant pressure produces 18 to 22 PSI during warm idle and expands to 50 through 65 PSI at 2400 RPM cruise speeds. Thermostats regulate internal coolant flow between 180°F and 195°F to stabilize combustion heat transfer. This 5.7-liter pushrod V8 generates 170 horsepower at 3800 RPM and 275 lb-ft continuous torque at 2000 RPM with an 8.0:1 compression ratio. Cylinder cranking pressure measures between 150 and 165 PSI across all eight chambers. The cooling system rejects 3400 BTU per minute during loaded highway transit.

Rocket 350 Crankshaft Transmission Alignment

A round 6-bolt rear crankshaft flange mounts flush to factory TH350 or TH400 automatic transmission flexplates. Measured crankshaft thrust endplay checks out between 0.0030 and 0.0070 inches. The 1.250-inch front crankshaft snout features a single keyway to position the timing crank gear and harmonic balancer, holding true accessory drive V-belt pulley alignment.

Rocket 350 Fleet Servicing Protocols

Technicians must prime the internal oil passages using an external priming tool inserted through the distributor hole before initial startup. Use high-zinc 10W-30 mineral motor oil during initial cam break-in to protect flat-tappet lifters. This cast iron engine is not engineered for turbocharging, nitrous injection, or competitive drag racing.

• Check crankcase oil level and coolant tank fluid volume each shift before vehicle dispatch
• Drain break-in motor oil and install fresh oil filter after 500 initial road miles
• Perform routine oil and filter changes every 3000 miles during commercial transit cycles

Rocket 350 Commercial Warranty Manifest

Commercial fleet purchasers receive a 3-Year / 100,000-Mile commercial fleet warranty covering structural casting and internal moving components. The heavy-duty wood crate contains one remanufactured long block engine, a complete engine install gasket set, spark plug well seals, front timing cover seals, dyno test documentation, and priming instructions.