Rolls-Royce 20/25 - remove pistons

 

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no pistons

 

 

All pistons removed.  The pins are perfect.

bore

 

 

A view down #1 bore to the big end pin.

wrong cap

 

 

Now for the bad news - or at least some of it.

The #2 and #5 big end caps had been assembled on the wrong con rods.  This is a foretaste of the final outcome.

 

piston

 

 

The pistons, rings, little ends and con rods all seem OK.  They will need detailed inspection to confirm this.

knackered shell

 

 

The white metal on the shell has started to disintegrate.  Numbers 2 through 5 display signs of failure.  There are no stress cracks, which indicates that there has been either localised overheating or the last remetalling was suspect.  The edges of the damaged areas are relatively smooth.

All of the shims are in good order.

More expense!

 

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