Mitsubishi 11A-12-66G7 Engine E W Piston and Connecting Rod, DA Piston and Connecting ROD

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11A-12-66G7 ENGINE (E - W) - Piston and Connecting Rod

Upper side rail

No. 1

Piston pin

No. 2 ring gap

Lower side rail

and spacer gap

6EN0549

 

7EN0032

Cylinder number

Notches

7EN0453

7EN0454

"DA PISTON AND CONNECTING ROD

(1)Liberally coat the circumference of the piston, piston ring, and oil ring with engine oil.

(2)Arrange the piston ring and oil ring gaps (side rail and spacer) as shown in the figure.

(3)Rotate the crankshaft so that the crank pin is positioned at the centre line of the cylinder bore.

(4)Use suitable thread protectors on connecting rod bolts before inserting piston and connecting rod assembly into cylinder block.

Care must be taken not to nick crank pin.

(5)Using a suitable piston ring compressor tool, install piston and connecting rod assembly into cylinder block.

Caution

D Install the piston with the front mark (arrow mark) on the top of the piston facing towards the engine front (timing belt side).

"EA CONNECTING ROD CAP

(1)Mate the correct bearing cap with the correct connecting rod by checking with the alignment marks marked during disassembly. If a new connecting rod is used which has no alignment mark, position the notches for locking the bearing on the same side.

(2)Check if the thrust clearance in the connecting rod big end is correct.

Standard value: 0.10 - 0.25 mm

Limit: 0.4 mm

E Mitsubishi Motors Corporation

Dec. 1996

PWEE9615

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Contents Contents 11A-0-111A-0-2 General Specifications General Information11A-0-3 Specifications Service Specifications11A-1-1 Rework Dimensions 11A-1-2Torque Specifications 11A-1-311A-1-4 Intake manifold11A-1-5 SealantsDisassembly 11A-1-6FORM-IN-PLACE Gasket Surface PreparationSpecial Tools 11A-2-111A-2-2 Removal and Installation Alternator11A-3-1 Removal Service Points Installation Service Points11A-3-2 AA Crankshaft BoltAIR Intake Plenum 11A-4-111A-4-2 AA Throttle Body GasketIgnition System 11A-5-1Timing Belt 11A-6-11113 11A-6-2 InspectionAA Timing Belt AB Camshaft Sprocket Bolt11A-6-3 AUTO-TENSIONERAA Camshaft Sprocket Bolt BA AUTO-TENSIONER11A-6-4 CA Timing Belt11A-6-5 Right bank Left bank11A-6-6 Standard value 3.8 5.0 mmDA Engine Support Bracket Intake Manifold 11A-7-111A-7-2 AA O-RING / Water PipeBA Thermostat CA Heater Inlet and Outlet Pipes11A-7-3 FA Intake ManifoldGainjector HA Fuel Pressure RegulatorExhaust Manifold & Water Pump 11A-8-16G7 Engine E W Exhaust Manifold & Water Pump 11A-8-26G7 Engine E W Exhaust Manifold & Water Pump Keep the O-ring free of oil greaseBA Exhaust Manifold Gasket Rocker Arms and Camshaft 11A-9-16G7 Engine E W Rocker Arms and Camshaft Lash Adjuster Leak Down Test AA Lash Adjuster11A-9-26G7 Engine E W Rocker Arms and Camshaft CamshaftBA Lash Adjuster 11A-9-3AA Camshaft CA Rocker ARM Shaft11A-9-46G7 Engine E W Rocker Arms and Camshaft DA Rocker Shaft SpringEA OIL Seal Cylinder Head and Valves 11A-10-16G7 Engine E W Cylinder Head and Valves 11A-10-26G7 Engine E W Cylinder Head and Valves AA Cylinder Head Bolt AB Retainer LockAC Valve Stem Seal Do not reuse the stem seal11A-10-3 Cylinder HeadValves Valve SpringValve Seat Reconditioning Procedure Valve Seat Replacement Procedure11A-10-46G7 Engine E W Cylinder Head and Valves Valve GuideValve Guide Replacement Procedure 11A-10-5AA Valve Stem Seal 11A-10-66G7 Engine E W Cylinder Head and Valves BA Valve SpringCA Valve Retainer Lock OIL PAN and OIL Pump 11A-11-1AA OIL PAN Lower AB OIL PAN UpperAC OIL Pump Outer and Inner Rotors OIL Pump11A-11-3 Standard value 0.04 0.10 mmStandard value 0.10 0.18 mm Limit 0.35 mm AA OIL Pump Inner and Outer Rotors11A-11-46G7 Engine E W Oil Pan and Oil Pump CA OIL Seal DA OIL PAN UpperGaoil Pressure Switch 11A-11-5EA OIL PAN Lower FA OIL FilterPiston and Connecting ROD 6G7 Engine E W Piston and Connecting Rod11A-12-1 11A-12-26G7 Engine E W Piston and Connecting Rod AA Connecting ROD CAPAB Piston PIN 11A-12-3 Piston RingCrankshaft PIN OIL Clearance Plastigauge Method 11A-12-46G7 Engine E W Piston and Connecting Rod AA Piston PINStandard values 7,350 17,200 N 11A-12-5 BA OIL RingSide rail may break if a ring expander is used CA Piston Ring no / Piston Ring no11A-12-66G7 Engine E W Piston and Connecting Rod DA Piston and Connecting RODEA Connecting ROD CAP Standard value 0.10 0.25 mm Limit 0.4 mmCRANKSHAFT, Flywheel and Drive Plate 6G7 Engine E W Crankshaft, Flywheel and Drive Plate 11A-13-111A-13-26G7 Engine E W Crankshaft, Flywheel and Drive Plate Crankshaft OIL Clearance Plastigauge MethodStandard values 0.02 0.04 mm Limit 0.1 mm Cylinder BlockBoring Cylinder Piston size identificationClearance between piston and cylinder 02 0.04 mm 11A-13-46G7 Engine E W Crankshaft, Flywheel and Drive Plate AA Crankshaft Bearing6G7 Engine E W Crankshaft, Flywheel and Drive Plate 11A-13-5 BA Bearing CAP / Bearing Bolt11A-13-66G7 Engine E W Crankshaft, Flywheel and Drive Plate Standard value 0.05 0.25 mm Limit 0.3 mmCA Crankshaft Rear OIL Seal DA OIL Seal Case

6G7 specifications

The Mitsubishi 6G7 engine is a robust V6 gasoline engine that has garnered attention for its blend of performance and efficiency. Primarily designed for use in a variety of Mitsubishi vehicles, including sedans and SUVs, the 6G7 series illustrates the engineering prowess of Mitsubishi in creating reliable and powerful engines.

One of the standout features of the 6G7 engine is its V6 configuration, which provides a good balance of power and smoothness. This engine typically displaces 3.0 liters, though variants exist with slightly different displacements. The 6G7 showcases a double overhead camshaft (DOHC) design, which facilitates efficient airflow and enhances power output. This configuration allows the engine to produce a substantial amount of horsepower while maintaining fuel efficiency, making it an attractive option for both performance-driven drivers and those focused on daily commuting.

In terms of technology, the 6G7 utilizes Mitsubishi’s advanced fuel injection system, which optimizes the fuel-air mixture for efficient combustion. This not only contributes to improved power output but also helps in reducing emissions, making the engine more environmentally friendly. Additionally, the integration of a variable valve timing (VVT) system enhances the engine's performance across various RPM ranges, providing both low-end torque and high-end power.

The 6G7 is designed with durability in mind. It features a robust iron block and aluminum alloy cylinder heads, which contribute to the engine's longevity and overall reliability. The use of advanced materials and manufacturing techniques helps to minimize wear and extend the lifespan of critical components.

Another important characteristic of the 6G7 engine is its smooth operation. The V6 configuration inherently provides balance, reducing vibrations and ensuring a refined driving experience. Coupled with a well-tuned exhaust system, the engine produces a pleasing sound that enhances the overall driving experience without being overwhelming.

In conclusion, the Mitsubishi 6G7 engine series stands out for its combination of power, efficiency, and durability. With advanced technologies like DOHC, VVT, and an efficient fuel injection system, the 6G7 remains a popular choice in various Mitsubishi models. Its smooth operation and robust construction further establish it as a reliable engine, appealing to a wide range of drivers seeking performance without sacrificing efficiency. The 6G7 serves as a testament to Mitsubishi's commitment to engineering excellence and innovation in the automotive industry.