Ticking Noises In Valve Gear When Idling At Normal Op Temp

Cause/Remedy:





With the lower idle speeds of engines with energy concept, the rocker arm no longer contacts the crankshaft base circle with adequate spring force.

Adding a thicker thrust piece to the valve retainer. This increases the preload of the compression spring (7) in the hydraulic valve clearance compensating element.





Select the thrust piece so that when checking the basic adjustment with the test gauge 100 589 04 23 00, the measuring edge 2 is positioned at the upper edge of the red measuring groove 1 (see arrow).

If the element causing the noise cannot be located, all thrust pieces of the cylinder bank concerned must be replaced.

If the noise is not caused by the hydraulic elements, check the valve clearance in the valve guides.





Thrust pieces "S" Part No.
in mm
6.15 117 053 07 53
5.8 117 053 06 53
5.45 117 053 05 53
5.1 117 053 04 53
4.75 117 053 03 53
4.4 117 053 02 53
4.05 117 053 01 53
3.7 117 053 00 53