Although the original barrels were reusable, we went for new parts for perfection. Many people will tell You to put the parts straight on just as they came out of the box, I would argue with this.
The very first piston came out like this: ring gaps at the same location. This would result oil loss and possibly compression loss.
Although came from the factory in sealed boxes, they were quite a bit dirty. And this type of dirt is evil: machining debris.
As You can see on the edge of this pipe cleaner: alloy dust.
After cleaning, I made a through measurement on the rings, and gaps, piston clearances. This time I was happy to see everything in order.
After fitting the cylinders, I checked the deck heights and counted the compression ratio.
With a preloved crank, and cylinder heads, it is mandatory to check if they make one flat surface before bolting the camshaft housing on, as otherwise the cam will get stucked. Interchanging the heads with some patience, You can come out with an acceptable combination.
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