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Car engine overhaul BMW 3 Series E46
Technical data
Cylinder head Maximum allowable surface warping under the gasket is 0.05 mm Height of new cylinder head: 4-cylinder engine M43TU - 141.00 mm 4-cylinder engine...
Cylinder head Maximum allowable surface warping under the gasket is 0.05 mm Height of new cylinder head: 4-cylinder engine M43TU - 141.00 mm 4-cylinder engine...
Basic information
Chapter 2B includes a description of the work associated with removing the engine-transmission unit (power unit) from the car, and the main types of repair of...
Chapter 2B includes a description of the work associated with removing the engine-transmission unit (power unit) from the car, and the main types of repair of...
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...
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...
Engine Removal — Methods and Precautions
1. If you have decided that the engine should be removed from the car for a medium or major overhaul, you need to perform a number of preliminary works. 2. It...
1. If you have decided that the engine should be removed from the car for a medium or major overhaul, you need to perform a number of preliminary works. 2. It...
Engine — removal and installation
Note: This is a complex operation. Read this entire paragraph before attempting it. Make sure you have a lifting device, jack, and supports of sufficient load...
Note: This is a complex operation. Read this entire paragraph before attempting it. Make sure you have a lifting device, jack, and supports of sufficient load...
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...
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...
Cylinder head — disassembly
Note: A new or reconditioned head can be purchased at service stations and from specialists. Since special tools and devices are required to disassemble and...
Note: A new or reconditioned head can be purchased at service stations and from specialists. Since special tools and devices are required to disassemble and...
Cylinder head and valve mechanism — cleaning and checking the condition
1. A thorough cleaning of the cylinder head and valve train and subsequent inspection of their condition will allow you to estimate the amount of repair work...
1. A thorough cleaning of the cylinder head and valve train and subsequent inspection of their condition will allow you to estimate the amount of repair work...
Cylinder head — assembly
Note: When assembling the cylinder head, all valve stem seals must be replaced. A valve spring compressor is required for assembly. 4-cylinder engine M43TU 1....
Note: When assembling the cylinder head, all valve stem seals must be replaced. A valve spring compressor is required for assembly. 4-cylinder engine M43TU 1....
Pistons and connecting rods — removal
Caution! On engines with piston cooling oil jets, be careful not to damage the jets when removing the pistons. The manufacturer recommends adjusting the...
Caution! On engines with piston cooling oil jets, be careful not to damage the jets when removing the pistons. The manufacturer recommends adjusting the...
Crankshaft — Removal
1. From a 4-cylinder engine, remove the oil pan, timing chain, balance shaft housing, and chain housing (only with M43TU engine) and the flywheel (faceplate),...
1. From a 4-cylinder engine, remove the oil pan, timing chain, balance shaft housing, and chain housing (only with M43TU engine) and the flywheel (faceplate),...
Cylinder block/crankcase — cleaning and condition check
Attention! On engines with piston cooling oil nozzles, be careful not to damage the nozzles when cleaning the engine. The manufacturer recommends adjusting the...
Attention! On engines with piston cooling oil nozzles, be careful not to damage the nozzles when cleaning the engine. The manufacturer recommends adjusting the...
Pistons and connecting rods — condition check
1. Before checking, the pistons and connecting rods must be thoroughly cleaned and washed, and the rings must be removed from the pistons. 2. To remove the...
1. Before checking, the pistons and connecting rods must be thoroughly cleaned and washed, and the rings must be removed from the pistons. 2. To remove the...
Crankshaft — Checking the condition
Checking axial play 1. To measure axial play, the crankshaft must be in place in the main bearings, but free in the axial direction. 2. Install a dial...
Checking axial play 1. To measure axial play, the crankshaft must be in place in the main bearings, but free in the axial direction. 2. Install a dial...
Main and connecting rod bearings — checking condition
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...
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 entire procedure description carefully to know the order of actions and to...
1. Before assembly, make sure you have all the necessary parts and tools. Read the entire procedure description carefully to know the order of actions and to...
Piston rings — installation
1. Before inserting the rings into the piston grooves, check the gaps in the track locks as follows. 2. Lay out the pistons with connecting rods and new track...
1. Before inserting the rings into the piston grooves, check the gaps in the track locks as follows. 2. Lay out the pistons with connecting rods and new track...
Crankshaft — installation
Selection of inserts 1. Give the crankshaft to the service station specialists. They will perform the necessary measurements, if necessary, turn the shaft...
Selection of inserts 1. Give the crankshaft to the service station specialists. They will perform the necessary measurements, if necessary, turn the shaft...
Pistons with connecting rods — installation
Caution! When installing pistons and connecting rods, be careful not to damage the oil jets for cooling the pistons, if they are present on this engine. The...
Caution! When installing pistons and connecting rods, be careful not to damage the oil jets for cooling the pistons, if they are present on this engine. The...
First engine start after repair
Caution! If the camshafts have been removed from a 6-cylinder engine, take into account the recommended delay after installing them before starting the engine...
Caution! If the camshafts have been removed from a 6-cylinder engine, take into account the recommended delay after installing them before starting the engine...
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