I don't know the Perkins
block. Are the cylinders sleeved? Or are you saying that even with the water
damage the cylinders can be oversized?
In my opinion this is about the machine work. The good news is it's all free until you have to decide. Get it apart and evaluate the block, crank and head
Get the head
zyglowed for cracks and then measured. Evaluate the valve seats etc.
get the block measured to make sure it's true and straight or can be made so. Evaluate the cooling
jacket and whether the cylinders can be oversized.
Get the crank maganfluxed and measured.
At this point you have your labor and maybe a couple of hundred in machine shop costs.
If anything is an issue, go with the Yanmar
. Otherwise keep what you got.
Even with the higher than predicted parts
bill you are still coming up a couple of thousand cheaper. Don't forget the externals - engine
, etc, etc, etc that go with the repower