Timing chain drive, general - GF05.10-P-9611-01C

Engine 112, 113

Shown on engine 112

Fig 1: Identifying Timing Chain Drive And General Components

Courtesy of MERCEDES-BENZ USA

Engine timing

The basic setting is 40° after TDC.

At 40° after TDC the grooves (6) in the left and right camshafts point in the direction of the inner V and are centered on the parting surface of the cylinder head cover. The copper-plated lugs (1) and marks on the camshaft sprockets (4 and 5) coincide.

The groove in the crankshaft (2) and the mark on the balance shaft sprocket (3) point toward one anther and both coincide with the copper-plated lugs (1).

Rubber-coated sprockets

In order to improve the noise characteristic of the timing case drive the chain sprockets on the crankshaft, balance shaft and camshafts are rubber-coated.

Only on engine 112

6 mm dia. locating holes (a) are located coinciding with one another in the rear balancing weight on the balance shaft and rear of the crankcase.

Repair note

Due to the difference in the timing chain paths it may be necessary to crank the engine up to 14 times before the marks on the camshafts coincide again.

Fig 2: Identifying Rear Balancing Weight On Balance Shaft And Locating Holes

Courtesy of MERCEDES-BENZ USA

Only on engine 112

Checking the balance shaft with engine assembled

Two marks, one at the front of the crankcase and the other on the end of the balancing weight, point toward one another and can be seen through the left timing case shaft approx. 22 cm. below the parting surface of the cylinder head cover when the cylinder head cover is removed.

Fig 3: Identifying Marks On Crankcase And Balancing Weight

Courtesy of MERCEDES-BENZ USA