Another disturbing noise from Ruby

[Ivor Hawkins]

As a specialist unit, I’m sure they know what they are doing and setting them square in the bores with say a 5 thou gap (I can’t remember the optimum gap off hand) should be fine.

However, when I was a spotty teenager and thought I knew it all, I rebuilt an old Humber motor and didn’t gap the rings at all, but still got the pistons in and the result was a similar noise to what you have.

I hope I’m wrong!