When I rebuilt this motor, I used genuine Kohler parts, the piston and rod have Kohler part numbers but are forged instead of cast. The cast piston to bore clearance is .007", and the forged is .0045". I also had the crank turned and the rod machined to accept Clevite 77 bearings, instead of no bearings inserts with the original rod, crank to rod clearance is roughly .002". The honing job was very good, prob more cross hatch than original so perhaps that could affect viscosity used?
Here's a few pics:
The cam checked out and have questions about what oil for the flat tappets, any brand with higher zinc? With this in mind, would my oil requirements change with the tighter clearances and rod bearings used?
I have less than 100 hours on the rebuild, and now that I have been thinking about it...likely in the neighborhood of 50 to 60 hours.
I have used Rotella T 30W for the majority of the time, 10W-30 Rotella briefly during the last snow storm of 2016. I have been changing the oil at about the 15 to 20 hour mark, I did change it after the first 2 hours when it was freshly rebuilt.
With the 30W Rotella, it doesn't use a drop, at least it stays right on the full mark, with the T6 Rotella 5W-40 it seemed to be down just slightly from the full mark at the 20 hr mark so I went back to the 30W.
So I'm curious what oil you would recommend with the tighter clearance, and the addition of rod bearings. I would like to use a full synthetic if possible, seems Rotella 15W-40 gets high praise.
Would a 50W multi-grade be to thick?
So the oils in question, including what's been used, are Amsoil 30W small engine as well as their 10W-40, Redline 10W-40, Rotella 10W-30, 30W, or even the 15W-40.
I understand It's a topic that's been discussed with this engine series in particular, but this time the specs are different than what's in the manual.
Here's a few pics:
The cam checked out and have questions about what oil for the flat tappets, any brand with higher zinc? With this in mind, would my oil requirements change with the tighter clearances and rod bearings used?
I have less than 100 hours on the rebuild, and now that I have been thinking about it...likely in the neighborhood of 50 to 60 hours.
I have used Rotella T 30W for the majority of the time, 10W-30 Rotella briefly during the last snow storm of 2016. I have been changing the oil at about the 15 to 20 hour mark, I did change it after the first 2 hours when it was freshly rebuilt.
With the 30W Rotella, it doesn't use a drop, at least it stays right on the full mark, with the T6 Rotella 5W-40 it seemed to be down just slightly from the full mark at the 20 hr mark so I went back to the 30W.
So I'm curious what oil you would recommend with the tighter clearance, and the addition of rod bearings. I would like to use a full synthetic if possible, seems Rotella 15W-40 gets high praise.
Would a 50W multi-grade be to thick?
So the oils in question, including what's been used, are Amsoil 30W small engine as well as their 10W-40, Redline 10W-40, Rotella 10W-30, 30W, or even the 15W-40.
I understand It's a topic that's been discussed with this engine series in particular, but this time the specs are different than what's in the manual.
