I believe with the 1.4 petrol the issue is it’s an aluminium block that once stripped down it’s no longer rigid and or distorts when the crank is unbolted - it may even be an alloy bore and then nicasil plated much like motor bike engines and rc model engines.
That's correct Mike. Same with the 1.2Tdi ANY/AYZ.
RAB
I was going to chip in with the same info as Mike, Rab and spike, having had the exact same problem as you on our 1.4 and after researching - the Audi technicals say you can't undo the main bearings as the block will distort. Madness imho but there we are.Ours has very slight nock when cold at 95k and according to the experts it could go on for another 50k like that no problem as long as frequent oil changes are carried out.
Out of serious interest how many oil changes has the car had since new? I'm convinced long extended 2 year oil changes does an engine no good.
Cheers Mark.
Checked on the Oil Changes. 9 in the Service Book. All since we got the A2 at only 1 year old. I’m sure there will have been at least 2 or 3 more done by me that are not in the book. Not got to 120,000 yet. About 119,750. Found I 5 Litres of Millers Trident Semi Synthetic VW Specific 5 40 so will change to that now.