Inline 6-cyl. gasoline engine Mercedes S-Class (W116)

Removal the engine
It is recommended to remove the engine and gearbox together as a single power unit and then disconnect the engine from the gearbox. The following work is performed the...

Engine installation
The engine is installed in the reverse order, observing the following points: Do not install units on the engine until it is mounted on the mounting supports and the...

Disassembly and assembly of the engine
All of the above section 2.2.1 . the work on disassembling an eight-cylinder engine applies equally to disassembling a six-cylinder engine. Disassembly of the engine is...

Removal the cylinder head
The cylinder head should only be removed when the engine is cold. The head is removed together with the intake and exhaust manifolds. Open the new cylinder head gasket...

Disassembling the cylinder head
The description below assumes replacement of the cylinder head. If only valve repair is assumed, additional work must be provided. It is assumed that the cylinder head...

Cylinder head repair
Check the wear of all cylinder head parts. Carefully clean the mating surfaces of the cylinder head from gasket residues. Valve springs All instructions for the...

Pistons and connecting rods — removal
After removing the covers and liners, remove the pistons and connecting rods from the cylinder block using a hammer handle. Before performing work, pay attention to the...

Measuring cylinders, checking pistons and connecting rods
All cylinder measurements for eight-cylinder engines apply equally to six-cylinder engines. The measurement diagram is shown in Fig. 28. If deviations from the table...

Assembly of pistons and connecting rods
Before installation, check the top surface of the piston head (if new pistons are installed). The piston diameter, group number and the last two digits of the part...

Installing pistons and connecting rods
Lubricate the cylinder surfaces. The connecting rods must match the cylinder number. The markings on the connecting rod and connecting rod cap must be located one under...

Cylinder block
All instructions section 2.6 fully apply to the six-cylinder engine, it is additionally necessary to measure the hole for the intermediate shaft, as described in section...

Removal the crankshaft
To remove the crankshaft, the engine must be removed from the vehicle. Disconnect the gearbox from the engine, being careful not to damage the drive shaft. Loosen the...

Crankshaft and flywheel: checking the parts
The crankshaft and associated parts are checked in the same way as for an eight-cylinder engine. Measure the clearances in the main bearings: install the main bearing...

Installing the crankshaft
Wipe the holes for the main bearing shells in the cylinder block, install the shells taking into account the location of the holes for supplying oil and the grooves for...

Flywheel or drive discs (automatic transmission)
Determine the dimensions "a" and "b" shown in Fig. 77. If surface "A" is processed, the surface of the clutch housing mount must also be processed to maintain the...

Damper and crankshaft pulley
All engines have a damper installed at the front end of the crankshaft. The damper design depends on the gearbox used. When replacing the damper, pay attention to the...

Rear oil seal
One of the reasons for clutch slippage is oil leakage through the rear oil seal. To replace the oil seal, you need to remove the engine. The procedure is described in...

Front oil seal
The front crankshaft oil seal is installed in the camshaft cover and can be replaced on the engine installed in the vehicle. First of all, you need to check whether the...

Camshaft drive
All work described in this section can be performed on the engine installed in the vehicle. The location of the drive chain and all drive components is shown in Fig. 84....

Removal and installation the chain tensioner
Drain the coolant from the cooling system. In cars with air conditioning, remove the compressor and set it aside along with the pipes. Unscrew the chain tensioner plug...

Removal and installation the drive chain
To replace the drive chain, you need a hand-held stripping machine that allows you to replace the chain without removing the engine from the car. The new drive chain...

Removal and installation the tensioner shoe
Fig. 84 shows the position of the chain tensioner shoe. The shoe is replaced when the plastic coating on the working surface wears out. Before installing, heat the shoe...

Removal and installation chain guides
The position of the chain tensioners is shown in fig. 84 (2, 2a and 2b). To remove the dampers, you need an impact puller, which is used to extract the damper axles. To...

Removal and installation the guide sprocket
Mark with paint the relative positions of the left camshaft sprocket and the drive chain as shown in fig. 91 . Remove the chain tensioner or tensioner spring. Remove the...

Removal and installation rocker arms
Always put the valve rocker arms back in their correct positions. When installing new rocker arms, it is necessary to carefully check the camshaft and, if necessary,...

Removal and installation the camshaft housing
Along with other work, removing the camshaft housing is necessary to replace the camshaft. In vehicles with adjustable wheel suspension, unscrew the mounting bolts of...

Removal and installation camshafts
The camshafts can only be removed after dismantling the camshaft housing. Before removing the camshafts, check the axial clearance in the shaft bearings: Install a dial...

Checking the valve timing
To check the valve timing, you need a special device and measuring tool. The work is quite complex and requires some experience: Remove the two rocker arms of the first...

Adjusting the valve timing
Adjustment of valve timing is necessary when replacing camshaft keys or drive chain. Keys are supplied in the following sizes: A shift of one tooth on the camshaft...

Adjusting clearances in valve mechanisms of 6- and 8-cylinder engines
The gap is measured between the working surfaces of the rocker arm and the camshaft cam. In a six-cylinder engine, it is necessary to remove the spring and the rubber...

Engine mount
The engine mount uses parts that are interchangeable with the parts eight-cylinder engine . All work related to replacing suspension parts is the same for eight-cylinder...

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W140 (1991-1998)