Got car back on Thursday. 20 EUR for the weld - bargain! It seems to be running OK and the oil leak has stopped. I took it for a good 60 mile run yesterday - no problems.
There's a slight smell of burning oil when I park up or am stationary but, I assume that is residual oil from the engine change and will burn off. Oil levels are good and I can't see any smoke or leaking oil.
The next issue I have is the aircon is not working. The blower works but just blows air at the ambient temperature. Would it be normal to de-gas the aircon when swapping out the engine? The aircon was OK before. The compressor was swapped over so I'm hoping it's just a re-gas.