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donald.lemay
Samba Member
Joined: March 01, 2009
Posts: 484
Location: Rhode Island
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 Posted: Sun Apr 11, 2021 12:34 pm Post subject: Main bearing |
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After marking up all my cylinders and top and I noticed my bearing has a shiny spot. Should I be concerned.
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66 13 window deluxe
2085cc
9to1compression
ported polished heads 40x36 valves
010 distributor
VS 42mm exhaust
40 IDF carbs |
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UK Luke 72
Samba Member
Joined: September 07, 2011
Posts: 2867
Location: Little Britain
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Ohio Tom
Samba Member
Joined: February 09, 2006
Posts: 1660
Location: Marshallville Ohio
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| Posted: Sun Apr 11, 2021 12:55 pm Post subject: Re: Main bearing |
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| Yep, dry spot. No big deal. I wouldn't even touch it. |
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donald.lemay
Samba Member
Joined: March 01, 2009
Posts: 484
Location: Rhode Island
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| Posted: Sun Apr 11, 2021 1:12 pm Post subject: Re: Main bearing |
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I wiped the lube off- every time I break down I wipe clean and re lube🤦♂️
_________________
66 13 window deluxe
2085cc
9to1compression
ported polished heads 40x36 valves
010 distributor
VS 42mm exhaust
40 IDF carbs |
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modok
Samba Member
Joined: October 30, 2009
Posts: 26776
Location: Colorado Springs
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| Posted: Sun Apr 11, 2021 1:52 pm Post subject: Re: Main bearing |
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If you want to make the whole surface shiny buff it with a cotton rag.
Makes no difference to the bearing. I think people like it tho.
Problem? why? It's lead bearing. People are always asking about how their bearings look.
The bearings with a lead based overlay always look interesting. But the different shades and patterns, in most cases, have no meaning.
Aluminum bearings look the same all the time and nobody asks, but they should.
So how does the bearing feel?
It's been waiting years to touch a crankshaft and it's very happy the day has finally come. |
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chrisflstf
Samba Member
Joined: February 10, 2004
Posts: 3436
Location: San Diego
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| Posted: Mon Apr 12, 2021 8:38 am Post subject: Re: Main bearing |
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| I would mic the bearing after case is torqued. I had a similar rub mark not long ago on a motor that had a very small particle imbedded in the case half which tweeked the bearing until clearance was only .0008". Removed the obstruction, but the bearing was already deformed. Crank would turn over easily with the case torqued. Replaced the bearing and all was well |
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mark tucker
Samba Member
Joined: April 08, 2009
Posts: 23937
Location: SHALIMAR ,FLORIDA
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| Posted: Mon Apr 12, 2021 9:52 am Post subject: Re: Main bearing |
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| check crank for runout as well as taper /barrell shaped/hourglass shaped. the crank should leave no marks. check line bore too.and make sure all the hardware is fully torqued.the big and small ones. |
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