Eagle Summit Mitsubishi Galant Expo 4G64 2.4L L4 Remanufactured Engine 1992-1995

Automotive mechanics battle balance shaft belt failures and head gasket leaks on older import platforms. This Mitsubishi Galant 4G64 Remanufactured Engine restores factory reliability to 2.4L 4-Cylinder 16-Valve SOHC motors. A mandatory trade-off requires replacing the hydraulic timing belt auto-tensioner and pre-filling oil galleries before startup to protect aluminum cam journals from metal contact.

Heavy cast iron block features casting mark 4G64 cast on the right side of the number 2 cylinder bank. The assembly features a 7-bolt flywheel crankshaft flange and SOHC 16-valve cylinder head. Total crated envelope dimensions measure 36in length by 36in width by 36in height with an engine weight of 265 lbs. Internal hardware includes a micro-polished nodular crankshaft, balance shafts, forged rods, and a 4.5-quart oil pan.

Key Features of Mitsubishi 4G64

Independent repair shops buy Mitsubishi 4G64 remanufactured engine long blocks to repower high-mileage wagons and sedans with factory-spec motors. This drop-in assembly eliminates crankcase blowby and restores smooth idle operation across all 4 cylinders.

- Precision CNC deck surfacing creates an Ra 25 finish to maintain cylinder head gasket retention
- Diamond plateau cylinder honing provides oil retention cross-hatching to seat rings within 500 miles
- Micro-polished 7-bolt crankshaft journals hold 0.0003in TIR runout to eliminate crank walk issues
- Align-honed main bearing tunnels maintain 0.0012in clearance to ensure stable oil cushion
- Dual balance shafts are precision aligned and fitted with new bearings to dampen harmonics
- Multi-layer composite head gaskets seal water jackets and oil return passages against external leakage
- Reconditioned SOHC 16-Valve cylinder heads feature valve seats cut to 0.001in concentricity for compression

Dyno Load Precision Machining Tolerances

Bench dyno testing verifies 138 HP at 5,500 RPM alongside 148 ft-lbs continuous torque at 3,000 RPM under heated run cycles. Machine shop specifications mandate crankshaft journal runout below 0.0003in TIR with connecting rod bearing oil clearances held at 0.0012in. Plateau-honed cylinder walls deliver uniform compression between 170 PSI and 175 PSI across all 4 combustion chambers. Hot engine oil pressure measures 55 PSI at 3,000 RPM while regulated coolant operating temperatures stabilize at 190°F during extensive load runs.

Vehicle Fitment Drivetrain Guide

This remanufactured long block fits 1992 to 1995 Eagle Summit, Mitsubishi Galant, and Mitsubishi Expo vehicles equipped with the 2.4L 2350cc SOHC 16-Valve 4-Cylinder engine and VIN code G. Mates with front-wheel drive and all-wheel drive configurations running 5-Speed Manual or 4-Speed Automatic transaxles. Fitment warning: this unit features a 7-bolt crank pattern and does not fit 6-bolt 4G64 applications, DOHC Galant GS models, or later 1996 and newer OBD-II crank sensor setups.

Installation Protocol Service Schedules

Inspect the balance shaft drive belt alignment marks and bleed the hydraulic timing belt tensioner before rotating the engine. Flush the oil cooler tubes and replace worn engine mount bushings to eliminate chassis vibration. Never run this non-turbo long block in custom turbo conversions exceeding 5 PSI of boost without dropping static compression through dished forged pistons.

- Fill crankcase with 4.5 quarts of SAE 10W-30 break-in oil before initial engine spin
- Drain initial break-in oil charge and change the spin-on filter after 500 miles
- Perform recurring motor oil and filter changes every 3,000 miles or 5,000 miles

Warranty Terms Core Return Policy

Every remanufactured long block includes our 3-Year Unlimited-Mile parts warranty for trusted shop and consumer protection. We provide prepaid freight return bills for your rebuildable core within an authorized 30-day return window. Each crated delivery contains the assembled long block, oil pan, front timing cover, and installation instructions.