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 machine, and the main types of repair of the...

Engine Repair — Basics
1. It is not always easy to determine when an engine overhaul is needed because there are many factors to consider. 2. High mileage is not always an indicator of the...

Powertrain Removal — Methods and Precautions
1. If you decide that the engine should be removed from the vehicle for a medium or major overhaul, you need to perform a number of preliminary operations. 2. It is very...

Four-cylinder gasoline engines — removal and installation
Removing Note: This job requires a hoist and winch. 1. Remove the gearbox as described in Chapter 7 . 2. Where required, remove the motor shield from below as described...

Six-cylinder gasoline engines — removal and installation
Removing Note: This operation requires an appropriate hoist and winch. 1. Follow the steps described in paragraph 4 p.p. 1-6, inclusive. 2. Remove the reservoir cap from...

Diesel engines — removal and installation
Removing Note: This operation requires an appropriate hoist and winch. 1. Follow the steps described in paragraph 4, p.p. 1-8, inclusive, given that it is not necessary...

Engine Repair — Disassembly Sequence
1. It is much easier to disassemble and repair the engine if it is installed on a special mobile stand. These stands can be rented from tool rental shops. Before...

Technical data
Cylinder head Maximum gasket deflection: 4-cylinder engines: Longitudinal - 0.15 mm Transverse - 0.05 mm All engines except 4-cylinder gasoline: Pro longitudinal - 0.08...

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

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

Cylinder head — assembly
Note: This operation will require a spring compressor and new slinger caps. 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, perform the following steps. A) On 4-cylinder petrol engines, remove the cylinder head and sump as described in Part A of this Chapter ....

Crankshaft — removal
1. Depending on the engine type, perform the following steps. A) On 4-cylinder petrol engines, remove the sump, camshaft timing chain and flywheel/faceplate as described...

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 blockages. To...

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

Crankshaft — condition check
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 it...

Main, connecting rod bearings and bearing cap bolts — inspection and fault 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 tell a lot about the...

Engine Repair — Assembly Procedure
1. Before assembling, make sure that you have all the necessary parts and tools at your disposal. Read the description of the repair procedure carefully so that you know...

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 with...

Crankshaft — setting and checking the clearance in the main bearings
Selection of 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...

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