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4-cylinder car engine BMW 3 Series E46
Technical data
General information Engine codes: 1796 cc engine with variable valve timing mechanism (Valvetronic) — N42B18 Engine 1895 cm³ — M43TUB19 1995 cm³ engine with...
General information Engine codes: 1796 cc engine with variable valve timing mechanism (Valvetronic) — N42B18 Engine 1895 cm³ — M43TUB19 1995 cm³ engine with...
Tightening force of connections, Nm
Valve timing adjustment unit to camshaft (n42 engine) 1st stage - 20 2nd stage - Turn to an angle of 90° 3rd step - Turn to 90° angle Automatic transmission to...
Valve timing adjustment unit to camshaft (n42 engine) 1st stage - 20 2nd stage - Turn to an angle of 90° 3rd step - Turn to 90° angle Automatic transmission to...
General information
How to use the information in this chapter This part of Chapter 2 describes the types of repair work that can be performed without removing the engine from the...
How to use the information in this chapter This part of Chapter 2 describes the types of repair work that can be performed without removing the engine from the...
Compression Test — Description and Analysis of Results
1. If the engine performance deteriorates or if there are interruptions in its operation, the cause of which cannot be attributed to the ignition system or the...
1. If the engine performance deteriorates or if there are interruptions in its operation, the cause of which cannot be attributed to the ignition system or the...
Setting the engine to the top dead center position of piston No. 1
Note: To fix the engine in the TDC position and to check the correct position of the camshafts, special devices are needed. Some of them can be made...
Note: To fix the engine in the TDC position and to check the correct position of the camshafts, special devices are needed. Some of them can be made...
Cylinder Head Cover — Removal and Installation
Note: When installing the cover, a new gasket may be required (see text). Engine M43TU Removal 1. At the rear of the engine compartment, remove the cabin...
Note: When installing the cover, a new gasket may be required (see text). Engine M43TU Removal 1. At the rear of the engine compartment, remove the cabin...
Crankshaft pulley and vibration damper — removal and installation
Engine M43TU Note: If the pulley hub is removed, reassembly will require a new bolt and a torque wrench capable of producing 330 Nm of torque. Removal 1....
Engine M43TU Note: If the pulley hub is removed, reassembly will require a new bolt and a torque wrench capable of producing 330 Nm of torque. Removal 1....
Timing Chain Covers — Removal and Installation
M43TU Engine - Top Cover Note: When installing the cover, you will need a new gasket and suitable sealant. To install the cover, you will need to screw two...
M43TU Engine - Top Cover Note: When installing the cover, you will need a new gasket and suitable sealant. To install the cover, you will need to screw two...
Timing chain — removal, inspection and installation
Engine M43TU Removal 1. Turn the crankshaft to the BMT position (see paragraph 3) and fix the flywheel. 2. Remove both chain covers as described in paragraph...
Engine M43TU Removal 1. Turn the crankshaft to the BMT position (see paragraph 3) and fix the flywheel. 2. Remove both chain covers as described in paragraph...
Timing Chain Sprockets and Tensioner — Removal and Installation
Engine M43TU Stars 1. Removing the sprockets is described in paragraph 7 as part of the chain removal procedure. Tensioner 2. Set the engine to the TDC...
Engine M43TU Stars 1. Removing the sprockets is described in paragraph 7 as part of the chain removal procedure. Tensioner 2. Set the engine to the TDC...
Camshaft timing chain housing (M43TU engine) — removal and installation
Note: A new gasket and a new rubber seal are required for assembly. A thin metal plate is also required for assembly (see text). Removal 1. Remove the camshaft...
Note: A new gasket and a new rubber seal are required for assembly. A thin metal plate is also required for assembly (see text). Removal 1. Remove the camshaft...
Valve timing drive (engine N42) — description and replacement of parts
Description 1. The N42 engine is equipped with a variable intake valve timing system known as Valvetronic. The purpose of the system is to increase engine...
Description 1. The N42 engine is equipped with a variable intake valve timing system known as Valvetronic. The purpose of the system is to increase engine...
Camshafts, rocker arms and hydraulic supports — removal and installation
Engine M43TU Note. The manufacturer recommends compressing the valve springs before removing the camshafts to relieve the shafts from their pressure. This...
Engine M43TU Note. The manufacturer recommends compressing the valve springs before removing the camshafts to relieve the shafts from their pressure. This...
Cylinder head — removal, inspection and installation
Note: New bolts and a new gasket will be required for installation. Engine M43TU Removal 1. Relieve the fuel system pressure as described in Chapter 4A....
Note: New bolts and a new gasket will be required for installation. Engine M43TU Removal 1. Relieve the fuel system pressure as described in Chapter 4A....
Pallet — removal and installation
Engine M43TU Removal 1. Drain the oil from the engine sump ( see chapter 1 ). 2. Lower the front subframe as shown in paragraph 15 . 3. Remove the bolt that...
Engine M43TU Removal 1. Drain the oil from the engine sump ( see chapter 1 ). 2. Lower the front subframe as shown in paragraph 15 . 3. Remove the bolt that...
Front amplifier — removal and installation
Removal 1. Different models may be equipped with one of two types of front amplifier: either frame-type ("cross") or flat. 2. Apply the parking brake, raise...
Removal 1. Different models may be equipped with one of two types of front amplifier: either frame-type ("cross") or flat. 2. Apply the parking brake, raise...
Front subframe — lowering, removal and installation
Lowering 1. To perform some types of work, for example, to remove the engine sump, the front subframe must be lowered. First, remove the front reinforcement,...
Lowering 1. To perform some types of work, for example, to remove the engine sump, the front subframe must be lowered. First, remove the front reinforcement,...
Balance shafts — general information, removal and installation
General information 1. To compensate for unbalanced engine sips and eliminate vibrations during its operation, 4-cylinder N42 engines are equipped with two...
General information 1. To compensate for unbalanced engine sips and eliminate vibrations during its operation, 4-cylinder N42 engines are equipped with two...
Oil pump — removal, inspection and installation
Engine N43TU Removal 1. The oil pump is a single structure with the chain housing. 2. Remove the chain housing as described in paragraph 9. Inspection 3. On...
Engine N43TU Removal 1. The oil pump is a single structure with the chain housing. 2. Remove the chain housing as described in paragraph 9. Inspection 3. On...
Crankshaft seals — replacement
Front crankshaft oil seal Engine M43TU 1. Replacement of the cuff is described in paragraph 6 as part of the lower timing chain cover removal procedure. Engine...
Front crankshaft oil seal Engine M43TU 1. Replacement of the cuff is described in paragraph 6 as part of the lower timing chain cover removal procedure. Engine...
Flywheel/faceplate — removal and installation
The procedure is similar to that described in paragraph 15 of chapter 2B for 6-cylinder engine.
The procedure is similar to that described in paragraph 15 of chapter 2B for 6-cylinder engine.
Crankshaft End Bearing — Replacement
The procedure is similar to that described in paragraph 16 of chapter 2B for 6-cylinder engine.
The procedure is similar to that described in paragraph 16 of chapter 2B for 6-cylinder engine.
Power Block Supports — Inspection and Replacement
The procedure is similar to that described in paragraph 17 of chapter 2B for 6-cylinder engine.
The procedure is similar to that described in paragraph 17 of chapter 2B for 6-cylinder engine.
Oil pressure and level sensors — removal and installation
Engine M43TU Oil pressure alarm sensor 1. Unscrew the oil filter cap and allow the oil from the filter to drain into the pan. This will reduce oil loss when...
Engine M43TU Oil pressure alarm sensor 1. Unscrew the oil filter cap and allow the oil from the filter to drain into the pan. This will reduce oil loss when...
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