Pulled down a 11K mile 79 that had got a bit of water in a cylinder while sitting (never run after) and found the small ends looked like this.
Then read this thread
you will note the RH small end looks like it got hot.
The brass coating is gone and using an indicator through the oil hole using the smooth end of the wrist pin. I got about .0005" of wiggle. The left hand side had no measurable slop.
2many sez the racing manual has a small end oiling mod that I need to look up.
This engine shows some signs of "extended" oil changes, might have been run with low oil, hard to know about PO maint. This pic shows a fine wire stuck in the LH jet hole it seems to be angled slightly up, more or less at the back of the piston.
This shot is a different crank/cases
I wonder whether I should drill the RH to match? I will swap to a different crank with better small ends and it's getting new oversize pistons rings etc.
My informal survey seems to show the RH jug tends to go first from detonation. and other untimely deaths.
rod wrist pin loose wear oil jets gallery small end scoring heat distort
Then read this thread
you will note the RH small end looks like it got hot.
The brass coating is gone and using an indicator through the oil hole using the smooth end of the wrist pin. I got about .0005" of wiggle. The left hand side had no measurable slop.
2many sez the racing manual has a small end oiling mod that I need to look up.
This engine shows some signs of "extended" oil changes, might have been run with low oil, hard to know about PO maint. This pic shows a fine wire stuck in the LH jet hole it seems to be angled slightly up, more or less at the back of the piston.
This shot is a different crank/cases
I wonder whether I should drill the RH to match? I will swap to a different crank with better small ends and it's getting new oversize pistons rings etc.
My informal survey seems to show the RH jug tends to go first from detonation. and other untimely deaths.
rod wrist pin loose wear oil jets gallery small end scoring heat distort