I have a question, My AEX Engine has a knocking lifter and its bad!! Has done it for nearly 10.000 miles now, i have tried lifter treatments and many oil changes, which haven't helped, I do have a new set of lifters here but i don't want to put them until i have tried everything.... Is it a common problem on the AEX 1.4 engines and is there any other tips any one can give that might sort it?
Any help would be much appreciated