BMW M52

BMW M52 engine
Overview
Manufacturer	BMW, Bayerische Motoren Werke AG
Production	1994–2000
Combustion chamber
Configuration	Straight-6
Chronology
Predecessor	BMW M50
Successor	BMW M54

The BMW M52 is a straight-6 DOHC piston engine which was produced from 1994-2000. It was released in the E36 320i, to replace the M50. It was replaced by the M54 engine.

Compared with its M50 predecessor, the M52 uses an aluminium block. However, North American models used iron blocks instead (except in the Z3), therefore the North American M52 is more akin to the M50TU. Like the M50TU, the M52 uses variable valve timing on the intake camshaft (called single VANOS by BMW).

In 1998, the M52TU ("technical update") was released, adding variable valve timing to the exhaust camshaft (called dual VANOS by BMW). Other upgrades included electronic throttle control (which uses a throttle cable as backup), a dual length intake manifold (called "DISA" by BMW) and revised cylinder liners.

The M52 and S52 engines were on the Ward's 10 Best Engines list from 1997 to 2000.

The S52 engine is used in USA versions of the 1996-1999 E36 M3 and the 1998-2000 Z3M. This engine is a tuned version of the M52 engine, as opposed to the S50 engine used for these cars in other markets.

A 1,991 cc (121 cu in) version was introduced in 1994. Bore is 80 mm (3.1 in) and stroke is 66 mm (2.6 in).

Applications:

The "technical update" in 1998 included dual VANOS, which improved low rpm torque.

Applications:

2.4 L. For Thai market only.

A 2,494 cc (152 cu in) version introduced in 1995. It produces 125 kW (168 hp). Bore is 84 mm (3.3 in) and stroke 75 mm (3.0 in).

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