Land Rover Discovery Owners & Service Manuals

Land Rover Discovery: Engine System - General Information Cylinder Compression Test - Ingenium i4 2.0l Diesel (G1817137) / General Procedures

Land Rover Discovery (2009–2016) Service Manual / Powertrain / Engine / Engine System - General Information Cylinder Compression Test - Ingenium i4 2.0l Diesel (G1817137) / General Procedures

GENERAL EQUIPMENT

Compression tester (petrol/diesel)

Land Rover diagnostic equipment

CHECK

CAUTIONS:

  • Before disconnecting any components, make sure the area is clean and free from foreign material. When disconnected all openings must be sealed.
  • The vehicle battery must be in good condition and fully charged before carrying out this procedure.

NOTES:

  • This procedure contains some variation in the illustrations depending on the vehicle specification, but the essential information is always correct.
  • This procedure contains illustrations showing certain components removed to provide extra clarity.

Engine System - General Information Cylinder Compression Test - Ingenium i4 2.0l Diesel (G1817137) General Procedures

Print graphic number E176229 for use later in this procedure.

Remove the glow plugs.

Refer to: Glow Plugs (303-07B Glow Plug System - INGENIUM I4 2.0L Diesel, Removal and Installation).

CAUTION:

Make sure the fuel injection system is disabled before carrying out a cylinder compression test. Failure to follow this step may result in damage to the vehicle.

Engine System - General Information Cylinder Compression Test - Ingenium i4 2.0l Diesel (G1817137) General Procedures

Disconnect the fuel injector electrical connectors.

Crank engine for approximately 5 seconds to remove any remaining fuel in the cylinders.

Engine System - General Information Cylinder Compression Test - Ingenium i4 2.0l Diesel (G1817137) General Procedures

Install the compression test gauge.

Torque: 10 Nm

NOTE:

This step requires the aid of another technician.

Engine System - General Information Cylinder Compression Test - Ingenium i4 2.0l Diesel (G1817137) General Procedures

  1. Crank the engine for 10 seconds, use illustration E176229 to record the figure displayed on the compression test gauge.
  2. Make sure the pressure is released from the compression test gauge after each cylinder recording.
  3. Remove the compression test gauge. Repeat the procedure for the remaining cylinders.

The minimum cylinder compression reading recorded must be within 10% of the maximum cylinder compression reading recorded. If the difference across the cylinders is higher than 10% please contact dealer technical support (DTS) for further assistance

Connect the fuel injector electrical connectors.

Install the glow plugs.

Refer to: Glow Plugs (303-07B Glow Plug System - INGENIUM I4 2.0L Diesel, Removal and Installation).

Using Landrover approved diagnostic equipment, read and clear any diagnostic trouble codes (DTCs).

Engine System - General Information Cylinder Head Distortion (G1802943) General Procedures

CHECK

Engine System - General Information Cylinder Head Distortion (G1802943) General Procedures

Using a suitable metallic straight edge and feeler gauge, measure the cylinder head face in the areas illustrated. Note the maximum value.

CAUTION:

Machine the minimum thickness of material from the cylinder head to meet specification. If a selection of cylinder head gaskets are available, increase the thickness of the cylinder head gasket by one size.

NOTES:

  • Prior to having the cylinder head machined, prior approval is required by Jaguar or Land Rover engineering.
  • If the cylinder head requires machining, this must be carried out by a local engineering company.

If the cylinder head exceeds the maximum value (0.2mm), the cylinder head must be machined.

Engine System - General Information Exhaust Manifold Cleaning and Inspection (G61240) General Procedures

GENERAL PROCEDURES

  1. Inspect the cylinder head joining flanges of the exhaust manifold for evidence of exhaust gas leaks.
  2. Inspect the exhaust manifold for cracks, damaged gasket surfaces, or other damage that would make it unfit for further use.

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