Nissan MR18DE 1.8L L4 Remanufactured Engine – 2006-2012

Description

Across demanding 12-hour municipal courier shifts requiring continuous stop-and-go transit, mirror-finished crankshaft journals and plateau-honed cylinder walls prevent thermal breakdown under heavy load inside the Nissan MR18DE 1.8L Remanufactured Engine. Built for 2006 to 2012 Versa commercial chassis, this 16-valve DOHC inline-four platform furnishes dependable fuel economy across rigorous multi-stop metropolitan schedules.

Precision die-cast aluminum block architecture contains pressed-in dry iron liners honed to Ra 25 micro-inch deck finishes. A precision-balanced forged steel crankshaft rotates within a structural aluminum lower bedplate, housing forged steel connecting rods and molybdenum-coated pistons. Sump capacity measures 4.0 quarts in a cast aluminum oil pan, while high-flow lubrication circuits protect overhead camshafts across an overall dry engine weight of 245 lbs.

Key Features of Nissan MR18DE

Fleet operators buy Nissan MR18DE remanufactured engine packages to optimize route profitability and eliminate unexpected mechanical failures. Automated cold-test spin verification ensures precise valve seat concentricity and dynamic combustion chamber sealing.

• Continuous variable valve timing optimizes intake camshaft phasing for responsive acceleration across urban routes
• Double overhead camshafts operate sixteen valves to maximize combustion chamber volumetric efficiency
• Multi-layer steel cylinder head gaskets maintain combustion seals against continuous thermal cycles
• Diamond plateau honed cylinder bores eliminate piston ring blow-by and oil vapor emissions
• High-flow internal trochoid oil pump provides 48 PSI cruising pressure to camshaft journals
• Structural aluminum lower girdle reinforces crankshaft main bearing bores against torsional flex
• Nissan MR18DE long block units pass rigid non-destructive ultrasonic flaw testing

Brake Output Thermal Boundaries

This motor outputs 122 horsepower at 5200 RPM alongside 127 lb-ft continuous torque at 4800 RPM using a 9.9:1 compression ratio. Dynamic cylinder cranking compression tests between 170 and 185 PSI across all four cylinders. Normal coolant operating temperatures hold between 185°F and 205°F, supported by 18 PSI hot idle oil pressure and 50 PSI cruising pressure. Radiator thermal rejection capacity measures 2250 BTU per minute under Severe Commercial Fleet duty cycle standards.

Transmission Flywheel Mounting Parameters

The rear crankshaft flange uses a six-bolt flywheel mounting pattern with an engineered 0.826-inch pilot counterbore diameter. Front crankshaft snout measures 0.984 inches with a precision friction-washer damper interface. Dial indicators measure crankshaft axial thrust endplay between 0.003 and 0.007 inches across all finished builds.

Commissioning Steps Maintenance Rules

Technicians must prime internal engine oil passages with an external pressure tank before turning the ignition key to protect fresh bearing surfaces from dry friction. Conduct a twenty-minute cam run-in procedure at 2000 RPM using high-zinc break-in lubricant. This engine is not engineered for aftermarket turbochargers, nitrous systems, or trailer towing weights exceeding vehicle chassis ratings.

• Inspect fluid reservoirs and accessory belts each shift
• Change motor oil and replace spin-on filter every 4500 miles
• Inspect cooling system hoses and radiator every twelve months

Fleet Guarantee Package Manifest

Protected by our 3-Year 100000-Mile commercial fleet warranty for verified transport operations. The heavy wooden container holds the remanufactured long block engine, high-capacity oil pump, complete engine install gasket kit, spark plug tube seals, and a certified dynamometer qualification inspection report.