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2020 New Build - Prussian Blue

Murbella – Day 46 – Notching the bearings

Posted on 2020-06-27

Engine – Day 10

So the bearings needed to be checked to confirm placement of the oil gallery of the bearing against the oil supply hole in the saddle.

There is enough disparity between the bearings available today as well as the machining of the oil gallery holes in the case that can constrict oil flow to the bearings. And of course, that would be disastrous.

2020 New Build - Scoring Bearing
2020 New Build – Scoring Bearing

#1, #3, and #4 bearings were scored to help with final alignment once they are installed on the crankshaft.

2020 New Build - Prussian Blue
2020 New Build – Prussian Blue

I used the prussian blue at the oil holes so that the compression of the bearing onto it would show fitment and placement of the hole onto the bearing.

2020 New Build - Prussian Blue
2020 New Build – #1 Main Clearance area

#1 Main Bearing was the worst. You can clearly see above the arc of the hole where the bearing’s surface covers the oil flow.

2020 New Build - Prussian Blue
2020 New Build – #3

#3 main was not as severe as #1. #2 also showed a bit of coverage.

2020 New Build - Bearing Notches
2020 New Build – #1 notched

I didn’t do the best possible job but I notched #1 enough so that the oil should flow into the groove a lot better. Yeah, the dremel got the better of me in some areas.

2020 New Build - Bearing Notches
2020 New Build – #2 main notch

#2 main needed a little bit of clearance as well.

2020 New Build - Beating Notch
2020 New Build – #3 main notch

#3 was also pretty minimal.

I lightly sanded the surfaces to debur anything and cleaned them up.

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