Apologies for late update!
We got the car back a few days ago and all seems fine, back to ‘normal’! I’m told we have now a new engine with revised internals and different spark plugs as advised by Seat, a spark plug had disintegrated and part of it had scored the cylinder bore. My assumption is that the plug had coked up, overheated and failed due to the oil issue and possible over fueling (very sooty black exhaust and surround, high fuel and oil consumption).
So I think we now have the CTHE engine and map (whoopee: 0–60 in 6.9 and 142mph max!) in place of the CAVE engine as per the
sticker in the boot. It should have the new pistons, rings, breather pipes, etc. with CTHE (see h t t p://w w w.vagoc.co.uk/vb/showthread.php?t=10073&page=2). Don’t know and can’t find
how to spot the CTHE engine externally, anyone?
So far the car feels great, though difficult to compare with the CAVE engine given the time it’s been away. The economy is better, was previously struggling to get 30mpg even on VPower, now hitting 35mpg easily (in D, drops a bit in S) though can’t give you an accurate reading as the wife managed to ‘vent fill’ it giving me heart failure at 21mpg for the first tank with new engine…. Must say, great service from the Seat garage, hats off to them.
Fingers crossed now: Hopefully the car is sorted for good, but it’s drinking VPower in the Last Chance Saloon, another
problem and it’s gone, am very wary of keeping it beyond warranty expiry now in any case.