Expansion tank level looking unchanged, and a moderate 'pschutt' of pressure release when opened this morning. Chain elongation fault code had returned since last cleared. 1 Fault Found: 18723 - Chain Elongation P150D 00 [01101101] - - Confirmed - Tested Since Memory Clear Freeze Frame: Fault Priority: 2 Fault Frequency: 1 Mileage: 266043 km Date: 2029.14.24 Time: 12:08:37 Engine speed: 2531.00 /min Normed load value: 28.6 % Vehicle speed: 103 km/h Coolant temperature: 92 C Intake air temperature: 20 C Ambient air pressure: 1010 mbar Voltage terminal 30: 13.913 V Unlearning counter according OBD: 40 Timing deviation after chain replacement: intake bank 1: 1.56 Timing deviation after other repairs: intake bank 1: 0.00 Timing deviation: current value intake bank 1: 5.93 Chain elongation: no. of valid initial values: intake bank 1: 5 Readiness: 0000 0100 Think I might acquire a spare engine and work on it to be ready for a quickish transplant if required. If only I had plenty of space. ☹️ I have acquired the chain repair kit 03F198158B at what seems like a bargain price of <£120 from a local dealership. Includes chain, cam and crank sprockets, guide rails, tensioner and all screws and bolts; but now unsure if it would be a poor investment of time and effort to use this on the current engine. Anyone know what, if anything is different in the complete CBZB engine for an automatic versus a manual transmission car? My favourite, low-mileage complete one currently on ebay is from an auto. Edit: researching the above question, flywheel is different, but tends to be un-included in spare engines I've seen. Then some bits of the breather system seem different, but not a lot else.