Jeep Wrangler 2007-2011 3.8L V6 Remanufactured Engine

Description

High-nickel cast iron block architecture absorbs extreme combustion pressure spikes while hypereutectic aluminum pistons resist thermal expansion during grueling vocational work truck operation in the Jeep Wrangler 3.8L V6 Remanufactured Engine for 2007-2011 Wrangler and Wrangler Unlimited JK platforms powered by the 60-degree overhead-valve EGH V6 engine system.

A rigid 60-degree cast iron engine block features cross-bolted main bearing caps to maintain journal alignment. The rotating core uses a micro-polished nodular cast iron crankshaft, forged powder-metal rods, and plateau-honed cylinder liners. Cylinder block decks hold an Ra 30 micro-inch surface finish. Total bare long block dry weight measures 415 lbs, requiring a 6-quart oil fill.

Key Features of Jeep Wrangler 3.8L V6

Municipal departments buy Jeep Wrangler 3.8L V6 remanufactured engine replacements to maintain reliable trail patrol fleets in harsh environments. The cast iron engine architecture sustains heavy loads across back-country rescue routes.

• 0.0017-inch main journal clearances preserve uniform oil wedge barriers under sustained high loads
• Multi-layer steel cylinder head gaskets maintain tight combustion seals against bore distortion
• Heavy-duty valve spring retainers prevent valve float during high-RPM hill-climbing maneuvers
• Precision ground camshaft lobes optimize low-RPM exhaust scavenging for superior low-end pull
• Front-mounted gerotor oil pumps produce continuous volume flow to protect valve train parts
• Computerized engine balancing suppresses mechanical harmonics to protect exterior accessories
• Jeep Wrangler 3.8L V6 long blocks match original wiring clips and driveline bolt points without rework
• Low-friction piston skirt coatings eliminate cylinder bore scuffing during initial cold start periods

Operational Compression Dynamic Pressure Metrics

Internal lubrication oil pressure reads 20 PSI at hot idle and 50 to 60 PSI under highway cruise. Coolant channels regulate operating coolant temperatures between 195°F and 215°F during full-load operations. A 9.6:1 compression ratio outputs 202 horsepower at 5200 RPM and 237 lb-ft peak torque at 4000 RPM. Cranking compression tests confirm 160 to 170 PSI across all cylinders. Severe Commercial Fleet duty dissipates 4600 BTU/min heat.

Crankshaft Snout Flange Machine Tolerances

The rear crankshaft hub provides a 6-bolt flywheel pattern paired with an internal pilot bushing hole. The front crankshaft snout measures 1.250 inches with a machined keyway slot for balancer alignment. Dial indicators record crankshaft endplay between 0.003 and 0.006 inches, avoiding premature wear against internal thrust bearings.

Priming Operations Prohibited Installation Applications

Pressure-prime internal engine oil passages using an external pressurized oil reservoir before initial engine startup. Use designated SAE 5W-20 break-in oil for the opening 500 operating miles. This engine is not engineered for turbocharging kits exceeding 6 PSI boost, marine watercraft, E85 conversion systems, or vehicles exceeding rated gross vehicle weights.

• Verify oil dipstick levels and radiator overflow coolant capacity each shift before vehicle dispatch
• Change the primary break-in oil and spin on a new filter after 500 miles
• Complete standard motor oil and filter change intervals every 250 hours or 4,000 miles

Commercial Warranty Terms Packaging Documentation

The product includes a 3-Year / 100,000-Mile commercial warranty covering parts and internal labor. The timber crate houses the complete remanufactured long block engine, pre-installed oil pump, full engine installation gasket set, pre-lube compliance worksheet, and final dyno test verification paperwork.