Overhaul of car engines Mercedes 190 (W201)

Basic information on engine repair
This part of Chapter 2 includes a description of the work associated with removing the engine-transmission unit from the car, and the main types of repair of the...

Engine repair — basic provisions
1. It is not always easy to determine when an engine overhaul is needed because there are many factors to consider. 2. High mileage does not always indicate the need for...

Removal the power unit — methods and precautions
1. If you have decided that the engine should be removed from the vehicle for a medium or major overhaul, you will need to perform a number of preliminary operations. 2....

Four cylinder petrol engines — removal and installation
Removal Note: A hoist and winch are required to perform this job. 1. Remove the gearbox as described in Chapter 7 . 2. Where required, remove the engine shield from...

Six-cylinder petrol engines — removal and installation
Removal Note: This operation requires a suitable hoist and winch. 1. Perform the actions described in paragraph 4, items 1-6, inclusive. 2. Unscrew the power steering...

Diesel engines — removal and installation
Removal Note: This operation requires a suitable hoist and winch. 1. Perform the actions described in paragraph 4, items 1-8, inclusive, taking into account that there...

Engine Repair — Disassembly Sequence
1. Disassembling and repairing an engine is much easier if it is installed on a special mobile stand. Such stands can be rented at tool rental points. Before installing...

Technical data
Cylinder head Maximum gasket distortion: 4-cylinder engines: Longitudinal - 0.15 mm Transverse - 0.05 mm All engines except 4-cylinder petrol: Longitudinal - 0.08 mm...

Cylinder head — disassembly
Note: A new or reconditioned head can be purchased from service stations and specialists. Since special tools and equipment are required to disassemble and inspect the...

Cylinder head and valves — cleaning and checking
1. A thorough cleaning of the head and valve train components followed by a detailed inspection will determine what work needs to be done to restore the valve train....

Cylinder head — assembly
Note: This operation requires a spring compressor and new valve stem seals. 1. Lubricate the valve stems and insert them into the guide bushings in their original...

Pistons and connecting rods — removal
1. Depending on the engine type, do the following:. a) On 4-cylinder petrol engines, remove the cylinder head and oil pan as described in part A of this Chapter . b) On...

Crankshaft — Removal
1. Depending on the engine type, do the following:. a) On 4-cylinder petrol engines, remove the oil pan, timing chain and flywheel/faceplate as described in part A of...

Cylinder Block/Crankcase — Cleaning and Inspection
Cleaning 1. Remove all external parts, electrical switches and sensors from the unit. For a complete cleaning, it would be good to remove all technological plugs. To do...

Pistons and connecting rods — condition check
Cleaning 1. Before checking, the pistons and connecting rods should be washed, and the old rings should be removed from the pistons. 2. Carefully spread the ring by the...

Crankshaft — Checking the condition
Checking the axial play of the crankshaft 1. When checking the axial play of the crankshaft, the latter must be installed in the cylinder block, but at the same time be...

Main, connecting rod bearings and bearing cap mounting bolts — inspection and defect detection
Examination 1. Even if you decide to replace the main and connecting rod bearing shells, you need to inspect them very carefully, since they can say a lot about the...

Engine Repair — Assembly Procedure
1. Before assembly, make sure you have all the necessary parts and tools. Read the repair procedure description carefully to know the order of actions and to be sure...

Piston rings — installation
1. Before inserting the rings into the piston grooves, check the gaps in the track locks by inserting new rings into the cylinders. 2. Lay out the pistons and connecting...

Crankshaft — installation and checking of clearance in main bearings
Selecting new inserts Four cylinder petrol engines 1. To determine the thickness of the required liners, the diameter of the shaft journals and the working clearance in...

Pistons and connecting rods — installation and checking clearance in the lower head bearings of the connecting rods
Selection of bearing shells Four cylinder petrol engines 1. To determine the thickness of the required bearing liners, the diameter of the shaft journals and the...

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190 (W201) (1982-1993)