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> Rebuiding Inside-out
bkrantz
post Jan 28 2023, 07:52 PM
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My first support design. I figure something like this should damp vibrations enough. This is easy since I don't have a distributor.


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bkrantz
post Jan 28 2023, 07:55 PM
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Meanwhile, I got a new oil seal (and spare) for the crank end. These are Erling, for those keeping score.


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bkrantz
post Jan 28 2023, 07:56 PM
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I popped out the old seal, and discovered another potential leak.


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bkrantz
post Jan 28 2023, 07:57 PM
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The case seam in the seal recess is not even at the bottom. You can see a small raised edge, that is obvious by feel. The top is fine.


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bkrantz
post Jan 28 2023, 07:58 PM
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About 10 minutes with some 600 grit sand paper.


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bkrantz
post Jan 28 2023, 07:59 PM
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Now the recess is even across the seam.


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930cabman
post Jan 29 2023, 07:48 AM
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QUOTE(bkrantz @ Jan 28 2023, 08:57 PM) *

The case seam in the seal recess is not even at the bottom. You can see a small raised edge, that is obvious by feel. The top is fine.


Axially?

I am not sure if I would be concerned with this. Did you get the oil pump straightened out?
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bkrantz
post Jan 29 2023, 10:35 PM
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QUOTE(930cabman @ Jan 29 2023, 06:48 AM) *

QUOTE(bkrantz @ Jan 28 2023, 08:57 PM) *

The case seam in the seal recess is not even at the bottom. You can see a small raised edge, that is obvious by feel. The top is fine.


Axially?

I am not sure if I would be concerned with this. Did you get the oil pump straightened out?


Yes, the offset was axial. I was concerned that the small step would keep the rubber on the outside of the seal from seating in full contact and could weep oil.
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bkrantz
post Jan 29 2023, 10:37 PM
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Time to start putting things back together. First I dressed the outside sealing surface of the fan hub with some 800 grit.


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bkrantz
post Jan 29 2023, 10:37 PM
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Smooth.


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bkrantz
post Jan 29 2023, 10:39 PM
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Then I got the seal ready to install, with a bit of grease on the sealing lip.


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bkrantz
post Jan 29 2023, 10:40 PM
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Then a couple of dabs of gasket sealant in the seal recess on the case seams.


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bkrantz
post Jan 29 2023, 10:41 PM
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Turns out my PVC pipe wheel cap tool is the right size for seating the seal.


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bkrantz
post Jan 29 2023, 10:43 PM
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Seal fully seated and bottomed out against the internal recess.


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bkrantz
post Jan 29 2023, 10:43 PM
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Hub with a bit of grease.


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bkrantz
post Jan 29 2023, 10:47 PM
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Torquing the hub retaining nut to 3.2 m-kg.


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bkrantz
post Jan 29 2023, 10:48 PM
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With a big screwdriver in the flywheel teeth to hold the crank in place.


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bkrantz
post Jan 29 2023, 10:49 PM
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Next the oil pump cover.


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bkrantz
post Jan 29 2023, 10:50 PM
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A thin smear of sealant on the gasket.


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bkrantz
post Jan 29 2023, 10:51 PM
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Both sides.


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