Mitsubishi 6G7 11A-12-3, Piston Ring, Crankshaft PIN OIL Clearance Plastigauge Method

Page 45

6G7 ENGINE (E - W) - Piston and Connecting Rod

11A-12-3

7EN0475

Push in using the piston

Piston ring

End clearance

7EN0476

1EN0246

INSPECTION

PISTON RING

(1)Check the clearance between the piston ring and the ring groove. If it exceeds the specified limit, change the ring or the piston and piston ring.

Standard values: No. 1 0.03 - 0.07 mm

No. 2 0.02 - 0.06 mm

Limit:

0.1 mm

(2)Place the piston ring in the cylinder bore, push it in by applying the piston head side, and make sure it is square. Then measure the clearance at the ring ends with a thickness gauge.

Change the piston ring if the clearance at the ring end is excessive.

Standard values: No. 1

0.30

- 0.45

mm

No. 2

0.45

- 0.60

mm

Oil

0.20

- 0.60

mm

Limit:

No. 1

0.8

mm

 

No. 2

0.8

mm

 

Oil

1.0

mm

CRANKSHAFT PIN OIL CLEARANCE (PLASTIGAUGE METHOD)

(1)Drain oil from the crankshaft pin and the connecting rod bearing.

(2)Place a piece of Plastigauge the length of the bearing width on the crankshaft pin straight along the pin centre.

(3)Gently place the connecting rod cap on top and tighten the bolt to the specified torque.

(4)Detach the bolt and gently remove the connecting rod cap.

(5)Measure the width of the crushed Plastigauge (at the widest point) using the scale printed on the Plastigauge package.

Standard value: 0.02 - 0.05 mm

Limit: 0.1 mm

E Mitsubishi Motors Corporation

Dec. 1996

PWEE9615

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Contents 11A-0-1 Contents11A-0-2 General Specifications General Information11A-0-3 Specifications Service Specifications11A-1-1 11A-1-2 Rework Dimensions11A-1-3 Torque SpecificationsIntake manifold 11A-1-4Sealants 11A-1-511A-1-6 DisassemblyFORM-IN-PLACE Gasket Surface Preparation11A-2-1 Special Tools11A-2-2 Removal and Installation Alternator11A-3-1 Installation Service Points Removal Service Points11A-3-2 AA Crankshaft Bolt11A-4-1 AIR Intake PlenumAA Throttle Body Gasket 11A-4-211A-5-1 Ignition SystemTiming Belt 11A-6-11113 Inspection 11A-6-2AA Timing Belt AB Camshaft Sprocket BoltAUTO-TENSIONER 11A-6-3AA Camshaft Sprocket Bolt BA AUTO-TENSIONERCA Timing Belt 11A-6-4Right bank Left bank 11A-6-511A-6-6 Standard value 3.8 5.0 mmDA Engine Support Bracket 11A-7-1 Intake ManifoldAA O-RING / Water Pipe 11A-7-2BA Thermostat CA Heater Inlet and Outlet PipesFA Intake Manifold 11A-7-3Gainjector 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 AA Lash Adjuster Lash Adjuster Leak Down Test11A-9-26G7 Engine E W Rocker Arms and Camshaft Camshaft11A-9-3 BA Lash AdjusterAA 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 AA Cylinder Head Bolt AB Retainer Lock 11A-10-26G7 Engine E W Cylinder Head and ValvesAC Valve Stem Seal Do not reuse the stem sealCylinder Head 11A-10-3Valves Valve SpringValve Seat Replacement Procedure Valve Seat Reconditioning 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 11A-11-1 OIL PAN and OIL PumpAB OIL PAN Upper AA OIL PAN LowerAC OIL Pump Outer and Inner Rotors OIL PumpStandard value 0.04 0.10 mm 11A-11-3Standard value 0.10 0.18 mm Limit 0.35 mm AA OIL Pump Inner and Outer RotorsCA OIL Seal DA OIL PAN Upper 11A-11-46G7 Engine E W Oil Pan and Oil Pump11A-11-5 Gaoil Pressure SwitchEA 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 BA OIL Ring 11A-12-5Side rail may break if a ring expander is used CA Piston Ring no / Piston Ring noDA Piston and Connecting ROD 11A-12-66G7 Engine E W Piston and Connecting RodEA Connecting ROD CAP Standard value 0.10 0.25 mm Limit 0.4 mm6G7 Engine E W Crankshaft, Flywheel and Drive Plate 11A-13-1 CRANKSHAFT, Flywheel and Drive PlateCrankshaft OIL Clearance Plastigauge Method 11A-13-26G7 Engine E W Crankshaft, Flywheel and Drive PlateStandard values 0.02 0.04 mm Limit 0.1 mm Cylinder BlockBoring Cylinder Piston size identificationClearance between piston and cylinder 02 0.04 mm AA Crankshaft Bearing 11A-13-46G7 Engine E W Crankshaft, Flywheel and Drive PlateBA Bearing CAP / Bearing Bolt 6G7 Engine E W Crankshaft, Flywheel and Drive Plate 11A-13-5Standard value 0.05 0.25 mm Limit 0.3 mm 11A-13-66G7 Engine E W Crankshaft, Flywheel and Drive PlateCA 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.
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