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In distress... help?
#2690082
08/21/19 05:22 PM
08/21/19 05:22 PM
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Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
OP
master
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OP
master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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Does anyone have a listing of engine bearings by bore size? I have an early Hemi (331) that Ive done a lot of work to, only to now find that the main bearing bores were made oversized at some point before me getting it. I built main caps for it. Made the bores of them undersized for fitment. I was just at the machine shop and they wanted to know what finished bore size I wanted... because the block had already been line bored over standard size. The bore spec is supposed to be 2.6565”- 2.657” The bore is now approximately 2.688” (best i could measure without the actual original caps) All bearing bores look good and measure about the same, they are just incorrect for this block. I assume the block was damaged at some point and someone adapted some other bearing into this block. Crank journal is at -.010 (2.500 journal) Any ideas/ solutions???
"use it 'till it breaks, replace as needed"
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Re: In distress... help?
[Re: MR_P_BODY]
#2690121
08/21/19 08:09 PM
08/21/19 08:09 PM
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Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
OP
master
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OP
master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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I just checked my A8 sprint car block. Looks like someone may have just made the hemi block accept 340 main bearings. Actually happy now instead of worrying.
"use it 'till it breaks, replace as needed"
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Re: In distress... help?
[Re: 4406bbl]
#2690376
08/22/19 03:07 PM
08/22/19 03:07 PM
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Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
OP
master
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OP
master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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Good to know. Unfortunately, I was able to find bearings for a stock bore, 010 under crank for a 331. Fairly spendy$$$. Now I have to seek out a set of 340 bearings, which I would imagine are easier to find, cheaper, and have a wider selection of options. All around though, Im glad it is what it is.
"use it 'till it breaks, replace as needed"
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