Valve Clearance: Testing and Inspection

Special Tools
999 5752
999 5753

Note! As the illustrations in this service information are used for different model years and/or models, some variation may occur. However, the essential information in the illustrations is always correct.

Preparation
Remove:





- the cover over the intake camshaft
- the upper timing cover
- the cover over the ignition coils.

Remove:





- the ignition coils without removing the connectors.

Note! Mark up before removal!

- the two ground connections
- the connector for the variable valve timing solenoid
- the right front wheel.

Set the engine to the test position





Install tool 999 5753 at the rear of the intake camshaft.
Turn the crankshaft in the direction of engine rotation (clockwise) until the marking on the tool (IN1/EX3) is opposite the thin flange running straight over the entire top of the cylinder head.
Remove all plugs from the test holes.

Note! If the crankshaft is turned too far, it is essential that it is turned back at least a quarter of a turn so that it can then be turned clockwise to the correct position.

Check the valve clearance





Check the valve clearance with feeler gauge 999 5752 at the intake valves for cylinder 1 and the exhaust valves for cylinder 3.
Insert the feeler gauge through the inspection holes. Bend the feeler gauge with light finger pressure so that it follows the top of the valve lifter.
The correct measurement will not be obtained until the feeler gauge has gone in approximately 15 mm.





Reference values

Note! Carry out this check with the engine at room temperature.

Make a note of the valve clearance on a form.

Next test measurement





Turn the crankshaft in the direction of engine rotation until the next marking In2/Ex1 is opposite the flange on top of the cylinder head. Perform the test measurement according to the previous description.
Continue by measuring the remaining valve clearances according to the markings on tool 999 5753.

Finishing

Note! For tightening torques not in the text, refer to Specifications.





Install:
- the plugs for the test holes. Tighten to 20 Nm
- the ignition coils according to the earlier markings
- the ground connections
- the connector for the variable valve timing solenoid.
Remove tool 999 5753.

Install:





- a new cover over the intake camshaft
- the right front wheel according to Front brake pads replacement.