11-04-2020, 04:02 PM
Just to show you lot I do listen ..... sometimes.
Your replies made me go and check in the book about ring gap sizes. Which in turn, reminded me about "belling"the white metal in the big ends.
Which meant the block off and the rods out, again.
So I might as well take a ring or two off to check, though that is a job I really, really hate - I know I will break at least one.
In the mean time, I looked at a You Tube video or two (Thanks, Zeto) which showed that too small a gap can cause scores in the bores.
Light bulb moment. So that is where it came from - in an engine that has hardly been run.
The top rings checked so far are fine 6 - 7 thou, as per Woodrow.
The oil rings - almost no gap at all.
Thinking about it - I don't think I have ever possessed an engine with new pistons, so have never had to do this before. I have seen it done, by my Dad 60 years ago, but I have always had
hand-me-down bits, and not had to bother.
Cheers
Simon
Your replies made me go and check in the book about ring gap sizes. Which in turn, reminded me about "belling"the white metal in the big ends.
Which meant the block off and the rods out, again.
So I might as well take a ring or two off to check, though that is a job I really, really hate - I know I will break at least one.
In the mean time, I looked at a You Tube video or two (Thanks, Zeto) which showed that too small a gap can cause scores in the bores.
Light bulb moment. So that is where it came from - in an engine that has hardly been run.
The top rings checked so far are fine 6 - 7 thou, as per Woodrow.
The oil rings - almost no gap at all.
Thinking about it - I don't think I have ever possessed an engine with new pistons, so have never had to do this before. I have seen it done, by my Dad 60 years ago, but I have always had
hand-me-down bits, and not had to bother.
Cheers
Simon