Author Topic: M44 Deck Height (Read 4546 times)

flyingbrickperformance · « **on:** August 03, 2011, 08:27:04 AM »

Looking into changing internals and need to confirm that the deck height of the M44 is the same as the M42 - any help is appreciated.

dsm2002 · « **Reply #1 on:** August 04, 2011, 02:11:04 AM »

I'd say the deck height of both is 212mm.

The crown heights according to the Mahle catalogue is:

M42 = 31.65mm
M44 = 30.4mm

Difference is 1.25mm which happens to be 1/2 the stroke difference.

Putting it another way:

212mm - 140mm - (81mm/2) - 31.65mm = -0.15mm (i.e. piston top above deck)
212mm - 140mm - (83.5mm/2) - 30.4mm = -0.15mm (i.e. piston top above deck)

Leo_328i · « **Reply #2 on:** December 26, 2011, 08:49:06 AM »

Where can you find the Mahle Piston catalogue?

dsm2002 · « **Reply #3 on:** December 27, 2011, 07:02:14 AM »

Mahle online catalogue