Petrol Engine Timing Tool - BMW M40/M43/M70/M73 Sealey VSE118
http://www.justoffbase.co.uk/core/me...9897ed42b338eb
http://www.justoffbase.co.uk/Petrol-...-Sealey-VSE118
I learned though that the M73 is used on a Roll Royce :)
Is the M40 similar to the M70?