4-cylinder car engine BMW 3 Series E46

Technical data
Total information Engine codes: 1796 cc 3 engine with variable valve timing (Valvetronic) — N42B18 Engine 1895 cm 3 - M43TUB19 Engine 1995 cm 3 with variable...

Connection tightening force, Nm
Knot of adjustment of phases of gas distribution to a camshaft (N42 engine) 1st step - 20 2nd step - Tighten 90° 3rd step - Tighten 90° Bolts of fastening of...

General information
How to use the information in this chapter This part of Chapter 2 describes the types of repairs that can be performed without removing the engine from the...

Compression test — description and analysis of results
1. In the event of deterioration in engine performance or in the event of interruptions in its operation, the cause of which cannot be attributed to the...

Setting the engine to the top dead center position of the piston No. 1
Note. To fix the engine in the TDC position and to check the correct position of the camshafts, special tools are needed. Some of them you can do yourself (see...

Cylinder head cover — removal and installation
Note. When installing the cover, a new gasket may be required (see text). M43TU engine Withdrawal 1. At the rear of the engine compartment, remove the pollen...

Crankshaft pulley and vibration damper — removal and installation
M43TU engine Note. If the pulley hub is removed, then assembly will require a new bolt and a torque wrench capable of generating a torque of 330 Nm. Withdrawal...

Camshaft drive chain covers — removal and installation
M43TU Engine - Top Cover Note. Installing the cover will require a new gasket and a suitable sealant. To install the cover, you will need to screw two studs...

Camshaft drive chain — removal, inspection and installation
M43TU engine Withdrawal 1. Rotate the crankshaft to BMT (see paragraph 3) and secure the flywheel. 2. Remove both chain covers as described in paragraph 6. 3....

Sprockets and camshaft chain tensioner — removal and installation
M43TU engine Asterisks 1. Removal of sprockets is described in paragraph 7 as part of the chain removal procedure. Tensioner 2. Set the engine to TDC #1 and...

Camshaft drive chain housing (M43TU engine) — removal and installation
Note. Reassembly will require a new gasket and a new rubber seal. You will also need a thin metal plate for assembly (see text). Withdrawal 1. Remove the...

Valve stroke actuator (N42 engine) — description and replacement of parts
Description 1. The N42 engine is equipped with a variable intake valve stroke system known as Valvetronic. The purpose of the system is to increase the power...

Camshafts, rocker arms and hydraulic bearings — removal and installation
M43TU engine Note. The manufacturer recommends that before removing the camshafts, compress the valve springs to release the pressure from the camshafts. This...

Cylinder head — removal, inspection and installation
Note. When installing, you will need new bolts and a new gasket. M43TU engine Withdrawal 1. Depressurize the fuel system as directed in Section 4A. Disconnect...

Pallet — removal and installation
M43TU engine Withdrawal 1. Drain the oil from the engine sump ( see chapter 1 ). 2. Lower the front subframe as directed in paragraph 15 . 3. Remove the bolt...

Front amplifier — removal and installation
Withdrawal 1. One of two types of front amplifier may be installed on different models. Or frame construction ("cross"), or flat. 2. Apply the parking brake,...

Front subframe — lowering, removing and installing
Lowering 1. To perform certain types of work. for example, to remove the engine sump, the front subframe must be lowered. First you need to remove the front...

Balancing shafts — general information, removal and installation
General information 1. To compensate for unbalanced engine sip and eliminate vibration during its operation, N42 4-cylinder engines are equipped with two...

Oil pump — removal, inspection and installation
N43TU engine Withdrawal 1. The oil pump is an integral structure with the chain case. 2. Remove the chain case as described in paragraph 9. Inspection 3. On...

Crankshaft seals — replacement
Forward cuff of a cranked shaft M43TU engine 1. Oil seal replacement is described in paragraph 6 as part of the timing chain lower cover removal procedure. N42...

Flywheel / faceplate — removal and installation
The procedure is similar to that described in paragraph 15 of chapter 2B for 6-cylinder engine.

Crankshaft shank bearing — replacement
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.

Emergency pressure and oil level sensors — removal and installation
M43TU engine Emergency oil pressure sensor 1. Unscrew the oil filter cap and allow the oil from the filter to drain into the sump. This will reduce oil loss...