Honda R18A1 1.8L L4 Remanufactured Engine – 2006-2011

Description

Propel commercial courier sedans through dense urban transit corridors under 180 PSI cylinder compression force without block cracking or coolant seepage across grueling shift schedules with the Honda R18A1 1.8L L4 Remanufactured Engine. Built for 2006 to 2011 commercial passenger fleets, this 1.8-liter SOHC i-VTEC powertrain outputs dependable highway acceleration and verified mechanical stamina.

An open-deck aluminum block undergoes ultrasonic thickness gauging to verify reinforced water jacket walls, eliminating casting crack vulnerabilities. Cylinder bores receive diamond plateau honing to Ra 28 micro-inches at a 45-degree angle. An induction-hardened forged steel crankshaft pairs with cracked-cap connecting rods and hypereutectic pistons with graphite skirt coatings. Equipped with an aluminum lower bedplate, a dry weight of 260 lbs, and a 3.9-quart oil capacity, internal tolerances remain consistent under continuous load.

Key Features of Honda R18A1

Commercial fleet purchasers buy Honda R18A1 1.8L L4 remanufactured engine models to eliminate common casting crack issues while maintaining outstanding highway fuel economy. Automated cold-spin testing verifies hydrodynamic bearing oil film retention across every single crankshaft journal before transport.

• Reinforced engine block casting eliminates coolant seepage issues common to factory original units.
• Economy i-VTEC valvetrain delays intake valve closure during cruising for exceptional fuel thrift.
• Multi-layer steel cylinder head gaskets maintain combustion containment during severe summer heat cycles.
• Integrated exhaust manifold cylinder head speeds warm-up times and reduces cold emissions.
• High-pressure internal trochoid oil pump feeds 50 PSI through clear block lubrication galleys.
• Dynamic mass balancing keeps harmonic rotating unbalance below 0.5 gram-inches.
• This Honda R18A1 crate motor connects straight to factory five-speed automatic or manual transaxles.

Casting Verified Dynamic Thermal Bounds

Engine lubrication maintains 18 to 22 PSI at warm idle and stabilizes between 45 and 60 PSI at 3000 RPM cruising speed. Coolant temperature operates from 185°F to 200°F via the primary thermostat circuit. The engine outputs 140 continuous brake horsepower at 6300 RPM and 128 lb-ft torque at 4300 RPM. A 10.5:1 compression ratio yields 170 to 185 PSI cranking compression across all four cylinders. Rated for High-Mileage Freight service, radiator heat rejection reaches 2,600 BTU/min under continuous hauling.

Transaxle Interface Snout Dimensions

The rear crankshaft flange uses an 8-bolt flexplate bolt circle machined for automatic transaxles or manual clutches. Pilot bore diameter measures 0.826 inches with concentricity verified within 0.0008 inches to prevent input bearing deflection. Front crankshaft snout measures 1.102 inches with a precision keyway, holding crank thrust endplay within 0.003 to 0.006 inches.

Pre-Lube Setup Operational Limits

Technicians must prime the lubrication channels using an external oil priming container through the oil pressure sensor port before initial starting. Fill with 5W-20 motor oil and clear air from the cooling system using vacuum filling equipment. This powertrain is not engineered for forced induction turbochargers exceeding 5 PSI boost, nitrous systems, or racing competition.

• Check crankcase motor oil level and coolant overflow bottles each shift.
• Change engine motor oil and filter every 4,000 miles or 150 hours.
• Inspect timing chain condition and serpentine belt tensioner every 12 months.

Fleet Warranty Transport Inventory

Protected by an extensive 3-Year / 100,000-Mile commercial fleet warranty covering parts and labor standards. Transport crate contents include the remanufactured long block engine, high-capacity oil pump, full vehicle installation gasket set, water pump inlet o-ring, pre-lube instruction sheet, and dynamometer cold-test validation reports.