What should i use for torque specs for rod bearing caps,main bearing caps and head bolts? 3/8" bolts, 5/16" bolts'
And plasti gauge bearing clearance?
Specs
- marinesteam
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Re: Specs
Snug them up until you let out a little involuntary grunt. That should be just about right. I'm sure that is how it was done in the
1890's. If it breaks you have gone too far!
Ken
1890's. If it breaks you have gone too far!

Ken
- barts
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Re: Specs
Bearing clearances need to be tight on double acting engines to prevent knocks; they'll run quite loose for a long time but you don't get that nice silent glide
....
.001 per inch in diameter seems a common middle of the road recommendation.
- Bart

.001 per inch in diameter seems a common middle of the road recommendation.
- Bart
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Bart Smaalders http://smaalders.net/barts Lopez Island, WA
Bart Smaalders http://smaalders.net/barts Lopez Island, WA
- Lopez Mike
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Re: Specs
If you think you are too small to make a difference, try sleeping with a mosquito.
Dalai Lama
Dalai Lama
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Re: Specs
marinesteam wrote: If it breaks you have gone too far!![]()
Ken
Then you need to back it off a quarter turn.

Retirement is about doing what floats your boat!
A BODGE : - A Bit Of Damn Good Engineering.
A BODGE : - A Bit Of Damn Good Engineering.