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Discussion Starter #1
I finaly have all the parts I needed to rebuild my motor to get it back running after my last motor spun a bearing! But when i was measuring my crank and rods to make sure STD bearing would fit. And found out the new cranks rod journals are not to spec. They all measured 1.7705" and the eagle rods measure 1.8900". And I can't find a list where I can find out what bearings to get. So if someone could point me in the right direction that would be great! Thanks!
 

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Here is a chart of Honda B series bearing thickness by color. To calculate actual bearing clearance, use the following formula:
BC = IDBT – ODC – (2 x BT)
BC = bearing clearance
IDBT = inside diameter of bearing tunnel (housing bore)
ODC = outside diameter of crank journal
BT = bearing thickness

Main Bearing thickness by color
Blue 2.013-2.010 mm 0.0793”- 0.0791”
Black 2.010-2.007 mm 0.0791”- 0.0790”
Brown 2.007-2.004 mm 0.0790”- 0.0789”
Green 2.004-2.001 mm 0.0789”- 0.0788”
Yellow 2.001-1.998 mm 0.0788”- 0.0787”
Pink 1.998-1.995 mm 0.0787”- 0.0785”
Red 1.995-1.992 mm 0.0785”- 0.0783”

Rod bearing thickness by color
Blue 1.510-1.507 mm 0.0594”- 0.0593”
Black 1.507-1.504 mm 0.0593”- 0.0592”
Brown 1.504-1.501 mm 0.0592”- 0.0591”
Green 1.501-1.498 mm 0.0591”- 0.0590”
Yellow 1.498-1.495 mm 0.0590”- 0.0589”
Pink 1.495-1.492 mm 0.0589”- 0.0587”
Red 1.492-1.489 mm 0.0587”- 0.0586”

Quoted from Earl(rip) on H-T
 

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Discussion Starter #5 (Edited)
I have seen that before while searching but it was for d series so I wasnt sure if it was applicable or not. So if so great I can get these ordered asap than! Thanks!

One more question what is the oil clearance needed for a turbo engine? It says for d16 in the service manual oil clearance is .020 - .038mm (.008-.0015 in) and max is .05 mm (.002 in). So when i figure my bearing size, do i have to subtract the oil clearance from it or is that figured out in the bearing sizes already?
 

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The bearing thicknesses are the same for just about every honda bearing, I know for a fact d/b/k do.

I always go for a little loose on clearances. 0.00075- 0.001" clearance for every inch of journal size is a good guideline.
 

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Discussion Starter #7
One more question what is the oil clearance needed for a turbo engine? It says for d16 in the service manual oil clearance is .020 - .038mm (.008-.0015 in) and max is .05 mm (.002 in). So when i figure my bearing size, do i have to subtract the oil clearance from it or is that figured out in the bearing sizes already?
 

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i just put acl standard bearings in my d16a6 yesterday. block was whopped and i came up with .0015-.0018 for clearances all the way down which although on the loose side made me happy it was still in spec.
 

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Is .0020 ok? In my manual it's technically out of spec. Depending on which main, tolerance was between .0014-.0019 max. Talking about a B-series though. Don't think it makes a diff since they have the same size main as a D.
 

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I finaly have all the parts I needed to rebuild my motor to get it back running after my last motor spun a bearing! But when i was measuring my crank and rods to make sure STD bearing would fit. And found out the new cranks rod journals are not to spec. They all measured 1.7705" and the eagle rods measure 1.8900". And I can't find a list where I can find out what bearings to get. So if someone could point me in the right direction that would be great! Thanks!
what the spec. for the rod journals?

any easier way to do it. is simply getting a bearing bigger then the color code equivelent to the out of spec the crank is. I'm guessing that 1.8900 is the big end without the bearings in it. which doesn't necessarly make anything bad here.
 

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Is .0020 ok? In my manual it's technically out of spec. Depending on which main, tolerance was between .0014-.0019 max. Talking about a B-series though. Don't think it makes a diff since they have the same size main as a D.
I also agree on the "loose is fast" when building a boosted motor. I too came out to near .002 on all my clearances with STD ACLs and that's what I'll be running.
 
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