Cavitation pictures

topic of cavitation comes up on here every so often so I thought I would post a picture of what it looks like. These sleeves are out of our 1066, last fall it started getting alot of blow by and a few weeks ago I noticed it was blowing a little coolant out of the blow by tube. When we got it apart there was also alot of evidence that there has been some coolant in the oil. The #3 piston had a broken compression ring that was causing the extra blow by and you can see the o-rings on the bottom of the sleeves are pretty bad so I'm pretty sure that is where the coolant was coming from. The tractor has 7,200 hours on it and this is the first time it has had any engine work done to it, you can still see the cross hatch marks in the sleeves and the ring end gaps are around .021" which is well below the .029" that IH say's is the most you can have. The bearings were pretty thing with most of the bearing surface wore off on most of them.

Constant vibration of the cylinder liner causes a momentary vacuum to form on its surface. Coolant boils into the vacuum and vapor bubbles implode on the surfaces of the liner, digging into unprotected liners.
This cause pits which can extend over time, through the thickness of the liner and allow coolant to enter the combustion chamber or crankcase.

• cavitation

scotty