Transcription of Chapter 2 Part B: General engine overhaul procedures - e34.de
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2 BGeneralCylinder compression pressure (all engines) ..10 to 11 barsOil pressure (all engines)At idle .. to barsRunning (for example, at 4000 rpm) ..4 bars or above (typically)Cylinder head warpage limitExcept M40 engine .. mm M40 engine .. mmMinimum cylinder head thickness (do not resurface the head to a thickness less than listed)M10 and M30 engines .. mmM20 engines .. mmM40 engine .. mmValvesValve stem diameter (standard)M10 and M30 engines .. mmM20 engine .. mmM40 engineIntake .. mmExhaust .. mmMinimum valve margin widthIntake .. mmExhaust .. mmValve stem maximum lateral movement (see text) .. mmValve face angleIntake ..45 Exhaust ..45 Chapter 2 Part B: General engine overhaul proceduresCompression check.
repair, as well as removal and refitting of the external components necessary for the overhaul, see Chapter 2A, and Section 7 of this Part. The Specifications included in this Part are only those necessary for the inspection and overhaul procedures which follow. Refer to Part A for additional Specifications. 2 Engine overhaul - general information
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