Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSLAND ROVER2009RANGE ROVER SPORT (LS) V8-4.4LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTTUNE-UP AND ENGINE PERFORMANCE CHECKSCOMPRESSION CHECKTESTING AND INSPECTION
2009 Land Rover Range Rover Sport (LS) V8-4.4L
Compression Check: Testing and Inspection
2009 Land Rover Range Rover Sport (LS) V8-4.4LSECTION Testing and Inspection
Compression test
WARNING: Make sure the parking brake is applied and the gear selector is in neutral (or park for vehicles with automatic transmission) before beginning this procedure. Failure to follow this instruction may result in personal injury.
1. Remove the fuel pump relay.
2. Start the engine and allow to idle. > The engine will run for a few seconds then stall The engine will run for a few seconds then stall
3. Remove the spark plugs.
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
^ 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.
WARNING: Make sure the parking brake is applied and the gear selector is in neutral (or park for vehicles with automatic transmission) before beginning this procedure. Failure to follow this instruction may result in personal injury.
1. Remove the fuel pump relay.
2. Start the engine and allow to idle. > The engine will run for a few seconds then stall The engine will run for a few seconds then stall
3. Remove the spark plugs.
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
^ 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.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.