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Perpetual Reassembler
 
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Reusing #8 Nose Bearing in 3.0L Motor

I am researching the parts I need to buy to reassemble my 3.0 case and I came across this thread which mentions re-using the #8 nose bearing:

Reusing Main Bearings

Any further thoughts to this? If feasible, how would I critique my existing bearing to determine if reusable? Measure with bore gauge and inspect for visual damage?

The thought behind re-using this bearing is purely for cost savings. But if the risk is too great I am not opposed to just buying a new one.

Thanks in advance.

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Last edited by 2jmotorsports; 03-22-2017 at 09:28 AM..
Old 03-22-2017, 09:25 AM
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Unless you see damage or excessive wear (scuffing), there is no need to replace it. It gets almost no load in operation. There's another main bearing between it and the first connecting rod.

Make sure you get a good seal around the outside of it when you mate the case halves. The o-ring can get pinched in the case seam. Also be careful to not let any lubricant you use on the o-ring get into the seam. It will displace the sealant and cause a leak. (Ask me how I know).

-Andy
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Old 03-22-2017, 09:52 AM
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Awesome. Thanks for the feedback!
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Old 03-22-2017, 01:44 PM
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+1, I was insecure about my old #8 due my snout damage causing a wobble on the pulley.

I ordered a new one and mic'ed them both. Identical, so do not worry if you see no visible damage.

So now I got a nice old within spec one :-( but new one sure is purty.
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Old 03-22-2017, 03:48 PM
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Hai. Arigato Draco-san.
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Old 03-23-2017, 10:36 AM
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Thumbs up

Quote:
Originally Posted by DRACO A5OG View Post
+1, I was insecure about my old #8 due my snout damage causing a wobble on the pulley.

I ordered a new one and mic'ed them both. Identical, so do not worry if you see no visible damage.

So now I got a nice old within spec one :-( but new one sure is purty.
I've got to agree I purchased a new one from our host and it sure is purdy! No one will know its new but me
Old 03-27-2017, 01:52 PM
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Quote:
Originally Posted by Billthebuilder View Post
I've got to agree I purchased a new one from our host and it sure is purdy! No one will know its new but me
That is all that matters, she is for you and only you
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Old 03-28-2017, 07:50 AM
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From 91429962993bk2914
 
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The race-seasoned 911 internal-artist that rebuilt my 3.0 said what many here opined.

There is little stress on the nose bearing and if it is visibly undamaged, it gets no real load in use / so reuse it. If you want to further Wayne's implementation of superb landscape architectural expression on his Beverly Hill Estate, buy a nose bearing. Every Man deserves an olympic pool in his backyard.

In the meantime, keep building your engine to completion.

cheers

Old 04-02-2017, 04:26 PM
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