Engine System - General Information Land Rover Range Rover Sport I

ENGINE V8 S/C 4.2L PETROL

SPECIAL TOOL(S) Oil pressure testing adaptor, 303-1166 Oil pressure testing gauge, 303-871

Scheme 1

Scheme 2

INSPECTION AND VERIFICATION

1. Verify the customer concern.
2. Visually inspect for obvious signs of mechanical or electrical damage.
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.

Engine oil pressure check - 4.2L

Note. Prior to checking the engine oil pressure, a road test of 6 miles (10 kilometers), must be carried out. Do not attempt to attain engine normal operating temperature by allowing the engine to idle.

1. Disconnect the battery ground cable. Refer to «BATTERY DISCONNECT/CONNECT»(/land-rover/range-rover-sport/i-2005-2009/remont/charging-system/#battery-and-charging-system-general-information__battery-disconnectconnect) .
2. Remove the engine oil pressure sensor. REFER to: «Engine Oil Pressure (EOP) Sensor»(/land-rover/range-rover-sport/i-2005-2009/remont/engine-control-systems/#electronic-engine-controls-v8-sc-42l-petrol) .
3. Install the special tool.
4. Install the special tool gauge and tighten the union.
5. Check and top-up the engine oil if required.
6. Connect the battery ground cable. REFER to: «BATTERY DISCONNECT/CONNECT»(/land-rover/range-rover-sport/i-2005-2009/remont/charging-system/#battery-and-charging-system-general-information__battery-disconnectconnect) .
7. Start and run the engine.
8. Note the oil pressure readings with the engine running at idle and 3500 RPM. REFER to: «Specifications»(/land-rover/range-rover-sport/i-2005-2009/remont/mechanical/#engine-v8-sc-42l-petrol__specifications) .
9. Turn off the engine.
10. Disconnect the battery ground cable.
11. Remove the special tools. Clean the components.
12. Install the oil pressure sensor. REFER to: «Engine Oil Pressure (EOP) Sensor»(/land-rover/range-rover-sport/i-2005-2009/remont/engine-control-systems/#electronic-engine-controls-v8-sc-42l-petrol) .
13. Check and top-up the engine oil if required.
14. Connect the battery ground cable.

OVERVIEW

As diagnosis of the different areas of the engine is covered in other sections and by general procedures, this section is limited to a compression and an oil pressure test.

For specific areas of the engine, refer to the GENERAL PROCEDURES .

1. Verify the customer concern.
2. Visually inspect for obvious mechanical faults. SYMPTOM CHART Mechanical Engine oil level Coolant level Transmission fluid level Fuel level Coolant leaks Oil leaks Fuel leaks Visibly damaged or worn parts Loose or missing nuts or bolts Fuel contamination/grade/quality Sensor fitment/condition Viscous fan and solenoid
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step
4. Use the approved diagnostic system or a scan tool to retrieve any diagnostic trouble codes (DTCs) before carrying out the following procedures. Make sure that all DTCs are cleared following rectification.

COMPRESSION TEST

1. Remove the fuel pump relay.
2. Start the engine and allow to idle. The engine will run for a few seconds then stall
3. Remove the spark plugs. REFER to: «Spark Plugs»(/land-rover/range-rover-sport/i-2005-2009/remont/ignition-system/#engine-ignition-v8-44l-petrol) .
4. Install a compression tester.
5. Hold the accelerator pedal to the floor and crank the engine a minimum of five and a maximum of ten engine revolutions and record the reading.
6. Repeat the test on each cylinder, cranking the engine approximately the same number of compression strokes. A reliable indicator of a problem is one cylinder reading lower than the others, rather than a minimum figure for all cylinders
7. Install the components in reverse order, observing the specified tightening torques.
8. Check and clear any DTCs.

OIL PRESSURE CHECK

Note. Before checking the oil pressure, carry out a 6 mile (10 kilometer) road test. Do not attempt to achieve normal operating temperature by allowing the engine to idle.

Scheme 3

1. Remove the engine oil pressure sensor. REFER to: «Engine Oil Pressure (EOP) Sensor»(/land-rover/range-rover-sport/i-2005-2009/remont/engine-control-systems/#electronic-engine-controls-v8-44l-petrol) .
2. Install the special tool to the oil filter housing.
3. Install the special tool gauge and tighten the union.
4. Check and top-up the engine oil, if required.
5. Start and run the engine.
6. Note the oil pressure readings with the engine at idle and at 3, 500 rpm. REFER to: «Specifications»(/land-rover/range-rover-sport/i-2005-2009/remont/mechanical/#engine-v8-44l-petrol__specifications) .
7. Turn off the engine.
8. Remove the special tools.
9. Install the oil pressure sensor. REFER to: «Engine Oil Pressure (EOP) Sensor»(/land-rover/range-rover-sport/i-2005-2009/remont/engine-control-systems/#electronic-engine-controls-v8-44l-petrol) .
10. Check and top-up the engine oil, if required.

As diagnosis of the different areas of the engine is covered in other sections and by general procedures, this section is limited to an oil pressure test.

For specific areas of the engine, refer to the GENERAL PROCEDURES .

1. Verify the customer concern.
2. Visually inspect for obvious mechanical faults. SYMPTOM CHART Mechanical Engine oil level Coolant level Transmission fluid level Fuel level Coolant leaks Oil leaks Fuel leaks Visibly damaged or worn parts Loose or missing nuts or bolts Fuel contamination/grade/quality Sensor fitment/condition Viscous fan and solenoid
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. Use the approved diagnostic system or a scan tool to retrieve any diagnostic trouble codes (DTCs) before carrying out the following procedure. Make sure that all DTCs are cleared following rectification.

Note. Prior to checking the engine oil pressure, a road test of 6 miles (10 kilometers), must be carried out. Do not attempt to attain engine normal operating temperature by allowing the engine to idle.

Scheme 4

1. Remove the oil pressure sensor.
2. Install the special tool to the oil filter housing.
3. Install the special tool gauge and tighten the union.
4. Check and top-up the engine oil, if required.
5. Start and run the engine.
6. Note the oil pressure readings with the engine running at idle and 3500 RPM.
7. Turn off the engine.
8. Remove the special tools.
9. Install the oil pressure sensor.
10. Check and top-up the engine oil, if required.

Scheme 5

1. Inspect bearings for the following defects. Cratering - fatigue failure Spot polishing - incorrect seating. Imbedded dirt engine oil. Scratching - dirty engine oil. Base exposed - poor lubrication. Both edges worn - journal damaged. One edge worn - journal tapered or bearing not seated.

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Scheme 7

1. Position on a length of plastigage on the bearing cap. Insert the camshaft, without lubrication, into the cylinder head. Position a plastigage strip, which should be equal to the width of the bearing cap, on the bearing journal.
2. Install the camshaft bearing caps. Follow the relevant tightening sequence.
3. Remove the camshaft bearing caps. Follow the relevant loosening sequence.
4. Using the special tool, read off the measurement. Compare the width of plastigage with the plastigage scale. The value that is read off is the bearing clearance. If the values are not to specification install a new camshaft.

Scheme 8

1. Determine the diameter of the camshaft journals. Using a micrometer measure the diameter at 90 degrees intervals to determine if the journals are out-of-round. Measure at two different points on the journal to determine if there is any tapering. If the measurements are out of the specified range, install a new camshaft.

Scheme 9

1. Using the special tool, measure the end play. Slide the camshaft in both directions. Read and note the maximum and minimum values on the dial indicator gauge. End play = maximum value minus minimum value. If the measurement is out of specification, install new components.

CAMSHAFT LOBE LIFT

1. Measure the diameter (1) and diameter (2) with a vernier caliper. The difference in measurements is the lobe lift.

Scheme 10

1. Inspect camshaft lobes for pitting or damage in the active area. Minor pitting is acceptable outside the active area.

Scheme 11

1. Mark and separate the parts and clean with solvent. Clean the oil passages.

CONNECTING ROD LARGE END BORE

1. Measure the bearing bore in two directions. The difference is the connecting rod bore out-of-round. Verify the out-of-round is within specification.
2. Measure the bearing bore diameter in two directions. Verify the bearing bore is within specification.

Scheme 12

1. Using the Dial Indicator Gauge with Brackets, measure the end play. Measure the end play by lifting the crankshaft using a lever. If the value is out of the specification, install new thrust half rings to take up the end float and repeat the measurement.

CRANKSHAFT MAIN BEARING JOURNAL CLEARANCE

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1. Read the grade letters from LEFT to RIGHT = FRONT to REAR of engine eg. for this example engine, the crank journal at the front of the engine is grade P, and at the rear is grade L. The selection of main bearing shells is described in the following chart.
2. Read the grade letters from LEFT to RIGHT = FRONT to REAR of engine eg. for this example engine, the crankpin at the front of the engine is grade A and at the rear is also grade A. Grade A = 56, 000 to 55, 994 mm (Bearing Shell Color Code - Blue). Grade B = 55, 994 to 55, 988 mm (Bearing Shell Color Code - Green). Grade C = 55, 988 to 55, 982 mm (Bearing Shell Color Code - Yellow).
3. Read the grade letters from LEFT to RIGHT = FRONT to REAR of engine eg. for this example engine, the crankpin at the front of the engine is grade A and at the rear is also grade A. Grade A = 53, 000 to 52, 994 mm (Bearing Shell Color Code - Blue). Grade B = 52, 994 to 52, 988 mm (Bearing Shell Color Code - Green). Grade C = 52, 988 to 52, 982 mm (Bearing Shell Color Code - Yellow).
4. The cylinder bore grades read from LEFT to RIGHT as follows: Bank 2 - Cylinder 1, Bank 2 - Cylinder 2, Bank 2 - Cylinder 3, Bank 2 - Cylinder 4, Bank 1 - Cylinder 4, Bank 1 - Cylinder 3, Bank 1 - Cylinder 2, Bank 1 - Cylinder 1. (Note, in earlier publications Bank 1 was described as A-Bank and Bank 2 as B-Bank) Grade 1 Bore = 85, 990 to 86, 000 mm. Grade 2 Bore = 86, 000 to 86, 010 mm. Grade 3 Bore = 86, 010 to 86, 020 mm.
5. Read the grade letters from LEFT to RIGHT = FRONT to REAR of engine eg. for this example engine, the crank journal bore at the front of the engine is grade W, and at the rear is grade N. The selection of main bearing shells is described in the following JOURNAL DIAMETER AND MAIN BEARING BORE CHART .
6. JOURNAL DIAMETER AND MAIN BEARING BORE CHART
7. The number in each diagonal band represents a PAIR of color coded main bearing shells which must be used with a specific journal, depending on the combination of journal diameter and crankshaft bore diameter. The color codes for each band are as follows: Blue/Green and Blue/Green Blue/Green and Blue Blue and Blue Blue and Green Green and Green Green and Yellow Yellow and Yellow Consider crankshaft journal 5 (from the example grade markings on the cylinder block) - the cylinder block bore is Grade N and the crankshaft journal diameter is Grade L. From the chart, it will be seen that the point of intersection is in Band 4 which equates to one Blue shell and one Green shell. When the appropriate pair of color codes have been selected for a journal, either color may be installed to the cylinder block or to the bedplate, but, the shell which is to be installed to the cylinder block must have an oil groove and the shell which is to be installed to the bedplate must be plain.
8. The thickness grade of all main bearing shells are to be selected to give a total running clearance of not less than 0.022 mm or greater than 0.040 mm. Each bearing bore in the block/bedplate assembly should be measured at two mutually perpendicular diameters 45° to the vertical in the middle of the bearing. The minimum diameter of the two is to be used. Each crankshaft main bearing journal should be measured dynamically at a point in line with the middle of each bearing. When the appropriate pair of color codes have been selected for a journal, either color may be installed to the cylinder block or to the bedplate, but, the shell which is to be installed to the cylinder block must have an oil groove and the shell which is to be installed to the bedplate must be plain.

Scheme 15

1. Measure the cylinder bore with an internal micrometer. Carry out the measurements in different directions and at different heights to determine if there is any out-of-roundness or tapering. If the measurement is out of the specified range, hone out the cylinder block or install a new block.

Scheme 16

1. Measure the cylinder block/cylinder head distortion. Using the special tool, measure the mating face distortion. If the value is not to specification rework the mating face.

EXHAUST MANIFOLD CLEANING AND INSPECTION

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.

Scheme 17

1. Carry out a visual inspection. Clean the piston skirt, pin bush, ring grooves and crown and check for wear or cracks. If there are signs of wear on the piston skirt, check whether the connecting rod is twisted or bent.

Scheme 18

1. Measure the piston pin diameter. Measure the diameter in two directions. If the values are not to specification, install a new piston and a new piston pin.

Scheme 19

1. Measure the diameter of the piston pin bore. Measure the diameter in two directions. If the values are not to specification, install both a new piston and a new piston pin.

Scheme 20

1. Using the Feeler Gauge, measure the piston ring gap. The values given in the specification refer to a gauge ring used during production.

Scheme 21

1. Using the Feeler Gauge, measure the piston ring clearance.

Scheme 22

1. Using a vernier gauge, measure the free length of each valve spring. Verify the length is within specification.

Scheme 23

1. Using a micrometer measure the diameter of the valve stems. If the measurements are not to specification, install a new valve.

LEAKAGE TEST USING SMOKE TEST EQUIPMENT

Note. The vehicle battery must be in good condition and fully charged before carrying out this procedure.

Note. On vehicles with 3.0L TDV6, it will be necessary to insert smoke at both air cleaner outlet pipes independently if the right hand turbocharger and associated hoses are to be tested.

Note. In some cases it may be necessary to remove undertrays, trim or engine covers to obtain access to all potential leak locations.

Note. Some variation in the illustrations may occur, but the essential information is always correct.

Note. For further information regarding operation of the test equipment refer to the manufacturers operators manual supplied with the kit.

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1. Install the smoke test equipment to a suitable location under the hood.
2. Connect a suitable compressed air line to the smoke test equipment.
3. Connect the smoke test equipment positive power cable to the battery positive terminal.
4. Connect the smoke test equipment negative cable to a suitable body ground point.
5. Observe the power indicator lamp on the smoke test equipment. Make sure that a continuous green light is displayed.
6. Disconnect the air cleaner outlet pipe(s).
7. Connect the smoke test equipment supply hose to the air cleaner outlet pipe. Install the appropriate adapter to the air cleaner outlet pipe. Connect the smoke test equipment supply hose to the adapter link hose.
8. Switch the smoke test equipment on.
9. Remove the oil filler cap, and observe until a constant flow of smoke is visible leaving the oil filler orifice. Install the oil filler cap.
10. Using the torch supplied in the kit set to white light, look for escaping smoke. Alternatively, use the ultraviolet light to look for fluorescent dye deposits at the source of a leak.

See also:
• BATTERY DISCONNECT/CONNECT
• Engine Oil Pressure (EOP) Sensor
• Specifications
• Spark Plugs
• Engine Oil Pressure (EOP) Sensor
• Specifications
• GENERAL PROCEDURES