Case 450 engine questions

Any idea what would cause this?

Does anyone out there have a decent used 207 or 188 for sale?

thanks

The cylinders are of course sleeved and any good rebuild kit will solve most of your problems. In regards to the head, is the pitting such that it is likely to cause sealing problems with the head gasket, or perhaps valves?

I'm not sure I'd automatically try to mill it all down to perfect smoothness as long as the head was straight and the sealing surfaces are clean and smooth.

Its interesting that the problem is in #3 as I'm told that #3 is often the first cylinder to go in these engines, but in that case its usually rod failure resulting in a new window in the block.

Generally speaking however I've been told and am under the impression that the 188 is a good engine and will give long service if properly maintained.

Wish I could be of more help,
John
1968 Case 450

The pitting is not a sealing concern, I'm more worried that the volume of the combustion chamber will change enough to cause problems when running. In a gas engine the rough surface could be a problem with preignition, but I can't think of that being a problem with a diesel.

I checked the corresponding old piston, and it had no marks. Strange...

I saw your post about the oil pump. Did you have a chance to see what kind of oil pressure the engine was holding before the rebuild? On my 188 the oil pressure was quite good but there was a lot of blow-by. My pump, mains and con-rod bearings were all in excellent shape (and still at stock specs), but I cracked a ring. I recall some shims for the pump but they were for setting the lash on the gears and did not have anything to do with endplay.

I've always been under the impression that you are mostly interested in equal wear on both sets of meshing gears, apart from obvious mis adjustments where the teeth show signs of bottoming out or the wear pattern is near the tips of the teeth.

I would not think that there is a lot of stress on the oil pump gears to begin with, and that whatever load they have is pretty even and consistent. Wish I could be more help here.

Best of luck,
John 1968 Case 450