Timing Components: Testing and Inspection

Valve Timing, Checking

Special tools, testers and auxiliary items required

• Camshaft clamp (T40070)

- Remove the cylinder head cover. Refer to => [ Cylinder Head Cover ] Service and Repair.

- Lock the crankshaft for checking the valve timing. Refer to => [ Crankshaft, Locking to Check/Adjust Valve Timing ] Crankshaft, Locking to Check/Adjust Valve Timing.

Valve Timing is Correct

Valve timing is correct when the bolts for the (T40070) can be installed easily into camshafts as shown. Support surfaces of the (T40070) must lie flat on the flats of the camshafts when doing this.





- If the bolts could not be installed easily, attempt to rotate the exhaust camshaft at the recess using an open end wrench - A - (18 or 19 millimeter (mm), depending on wrench width) slightly in the - direction of the arrow - in order to eliminate any play in the chain drive.

If the bolts for the (T40070) can now be installed easily with the chain drive tensioned in this manner, the valve timing is also correct. Possibly the crankshaft was not secured correctly.

Valve Timing is Not Correct

Valve timing is not correct when the bolts for the (T40070) cannot be installed easily into the camshafts despite the tensioned chain drive.

• In this case, the valve timing must be adjusted. Refer to => [ Valve Timing, Adjusting ] Adjustments.

Assembly

Assembly is performed in the reverse order of removal. When doing this note the following:

• Remove the (T40069) from the cylinder block and install the locking bolt (30 Nm).