Reground crank and bearings install question.

[Mark's 37]

The cap on the left appears to have a #2 stamped on it.

Can't seem to get a better detail photo. They both have a "K" stamped on the top, one has what looks like a "2" next to it and they both have a "1" on the side between the bolt hole and the top of the cap.

The other caps in the photos of them installed on the crank, one has an "N" stamped on the top with a "3" on the side, the second one has a "D" on the top and an "8" on the side between the bolt hole and the top of the cap. No other stamps.

 

[JSeery]

Caps are normally not stamped at the factory (for position in the engine). So if a cap is marked it is most often an indication of at least one rebuild in it's life.

 

[Mark's 37]

Today I went through all the measurements. Dial bore gauge gave the same readings for the mains with the bearings installed and torqued with only the rear being maybe .001-2 different. Checked to see if there was any evidence or witness marks of interference by the crank fillets, nothing. Repositioned the crank and plastigauged the mains. They all were .0.0015" and rechecked after turning the crank 180 degrees. Same readings. With the caps installed, the one with the two white paint spots in the front and the other in the center the crank is free and I can spin it and get about one full rotation after I let it go. Installing the cap with the two white spots as the center, the crank won't move. So...I'm about ready to stop f&%$ing with it and call it good with the front cap being the one with the two paint marks. Also, I did rotate the crank slowly to pick up a "sweet" spot where the drag increased but it feels, at least to my feeble arms, constant.

 

[JSeery]

Sounds like someone mixed up the caps when they marked them (or had a weird idea of how to mark them!)

 

[Mark's 37]

Sounds like someone mixed up the caps when they marked them (or had a weird idea of how to mark them!)

That is what I suspect but it is a mystery at any rate. Removing the paint marks on the cap and remarking it today. It was a lot of work assembling/re-assembling many times, measuring, etc. but learned quite a bit from doing it. That is the point of doing this build and it is fun plus it keeps the old brain exercised. New set of valves come on Monday so probably start fitting the rings and piston/rods this weekend.