Having a disaster with 6 year old 645 I bought 2 years ago.
Was a fast 'ticking' noise coming from engine that could only be heard outside of car. Took into local garage, who started at top of engine and worked there way down. Discovered problem with pistons (4 week delay while waiting on Special tool from Germany). Quote of £3500 at this stage, Once pistons out, discovered scores in bore holes. Ordered Short Motor? (£4,500) but that turns out to not include crankshaft, etc. So now looking at full new engine, which is coming in at £11,200 + vat.
Once add in garage fitting cost would be better scrapping the car!
Garage tried to source 2nd hand engine, but in 3 months car in garage only 1 came up (£4,200), but at the last stage it turned out not to be fit for purpose.
No complaints about the garage, they have been great.
Anybody any ideas where I could source a 2nd hand engine?
Any help appreciated.