I can only guess. The car didn’t come with spark plugs, so I assume these were past their due date.
A compression test I did (after making sure I could crank the engine over by hand) showed low readings on all cylinders at first.
The cylinder head was partially covered in oil sludge.
As the readings were even on all four cylinders and I couldn’t really tell if my newly acquired ebay compression tester was reading true, I just reassembled the engine with fresh spark plugs and gave it a try .
It fired up almost immediately with clouds of white smoke billowing from the exhausts.
After a while the smoke reduced and to be sure it really was smoke and not steam, I also did a CO check on the coolant- without any indication the exhaust gas had found its way into the water.
By the time it was at operating temperature, the smoke was gone completely .
So I fitted the turbo hoses and took the Copen for a 90 Km test-drive (scaring the hell out of wife and two daughters on all available roundabouts (sequentially, for obvious reasons ) .
So far so good . Today I did 220 km of German Autobahn without any issue.
My only concern being fuel consumption: The Copen easily tops the Volvo V70R I also own.
Is that normal?