BMW E30 Engine Technical Articles
BMW e30 models came equipped with variety of four and six cylinders motors - namely:
M10 engine - in early four cylinder models such as 318.
M20 engine - has six cylinders and came in two main different versions - M20B25 found in e30 325i and 325is, and M20B27 found in e30 325 and 325e or 'eta'. There was also M20B27 'super eta' made only in 1988.
M42 engine - is a dual overhead cam engine found in later versions of four cylinder models such as e30 318i, 318is, 318 iC.
This engine DIY writeup procedures are intended to help with engine repair and care process.
Timing Belt and Water Pump replacement
BMW E30 timing belt and water pump replacement procedure. Information is illustrated with pictures parts and tools used.
M42 Timing Chain Tensioner Replacement
BMW E30 M42 engine chain tensioner repalcemant preocedure. A weak or frozen tensioner can cause timing chain noise. Replacement of the tensioner takes about ten minutes and requires only a 19 mm socket wrench.
M40 Camshaft Replacement
BMW e30 with M40 motor is prone to camshaft failure, either because of inadequate oils supply or possibly the surface hardening valve train components - this is DIY procedure how to change camshaft.