The crank was degreased in our Hotsy hot chemical bath cleaner. Next, we installed the crank on the polishing lathe where the crank's main and rod journals were polished.
See the surface is now perfectly smooth and polished? The lathe completely removes the foreign material from the surface and is nice and smooth to aid in long bearing life.
After polishing the crank, all journals are measured with precision micrometers to insure correct oil clearance between the journal surface and the bearing shells. Too much clearance will result in low oil pressure. Not enough clearance will result in bearing failure... and a big repair bill.
The rod journal measured in t 2.1228 inches in diameter and the mains measured in at 2.248 inches in diameter. This means it's in the clear for using standard main and rod bearings.
Please keep in mind that all this work is done in house. This way we can insure all machine work is done properly and to usable tolerances which results in longer engine life.
No comments:
Post a Comment