Rod and main bearing help

[cruz1383]

i just got my block back from the machine shop he has told me that i need a red bearing on my number 3 main i had given him king standared bearings and he had measured them them and came up with this.....

main with customer supplied bearings

housing W/ bearing shaft clearance
1 2.1665 2.1645 .0020
2 2.1666 2.1644 .0022
3 2.1655 2.1648 .0007
4 2.1666 2.1646 .0020
5 2.1666 2.1647 .0019
rods with customer supplied bearings

housing W/ bearing shaft clearance
1 1.7728 1.771 .0018
2 1.7728 1.771 .0018
3 1.7728 1.771 .0018
4 1.7728 1.7709 .0019


the clearance for the book says that for the main bearings

standard (new) NO. 1,5 journals:
.018-.036mm(.0007-.0014 in.)
NO. 2,3,4 journals:
.024-.0042mm(.0010-.0017in.)
service limit .05mm(.002in.)

the clearance for the rods are

standard (new).020-.038mm(.0008-.0015in.)
service limit .05mm(.002in.)

my Question is by his measurements i am almost off the honda specs on the book and could they be a little bit tighter? and would it be better to tighten them up? and what to do with the NO. 3 main? i know i need a smaller bearing but i called honda and they dont know the shell thickness for the bearings just the color for them.

this is a vitara build for turbo about 450 WHP is what im shooting for.

[SpoolinSol]

i'm sure the bearing thickness info is somewhere on H-T; but you should definitely get thicker bearings (except for main #3) to tighten up those clearances..

[TheMadScientist]

Originally Posted by cruz1383

i just got my block back from the machine shop he has told me that i need a red bearing on my number 3 main i had given him king standared bearings and he had measured them them and came up with this.....

main with customer supplied bearings

housing W/ bearing shaft clearance
1 2.1665 2.1645 .0020
2 2.1666 2.1644 .0022
3 2.1655 2.1648 .0007
4 2.1666 2.1647 .0019

rods with customer supplied bearings

housing W/ bearing shaft clearance
1 1.7728 1.771 .0018
2 1.7728 1.771 .0018
3 1.7728 1.771 .0018
4 1.7728 1.7709 .0019


the clearance for the book says that for the main bearings

standard (new) NO. 1,5 journals:
.018-.036mm(.0007-.0014 in.)
NO. 2,3,4 journals:
.024-.0042mm(.0010-.0017in.)
service limit .05mm(.002in.)

the clearance for the rods are

standard (new).020-.038mm(.0008-.0015in.)
service limit .05mm(.002in.)

my Question is by his measurements i am almost off the honda specs on the book and could they be a little bit tighter? and would it be better to tighten them up? and what to do with the NO. 3 main? i know i need a smaller bearing but i called honda and they dont know the shell thickness for the bearings just the color for them.

this is a vitara build for turbo about 450 WHP is what im shooting for.

First off there are 5 mains bearings not 4, find that info out on the other and I can help you with that one also

but from the info you gave and how I took it

mains
1-fine
2-tighten it up a bit
3-loosen it up,thats a spun bearing waiting to happen
4-fine

All your rods are fine

King,acl,clevite,etc... standard bearings are green
the acl's ive gotten in the past year or two have been more of a brown then a green (a bit bigger)

On your #2 main get 1 brown bearing half and spec it out, it should be perfect. If still a lil loose get another brown half and then try that.

#3 get 2 red bearing halves and that should take you somewhere between .0015-.0019"

On N/a engines that i build I spec to .0015" on all mains and rods
On boosted engines that I build I spec a lil looser about .0017-.0022 depending on application, the build, how much boost,etc..

Im in a good mood today lol... usually I dont talk to much. hope that helps you out.

[cruz1383]

sorry the girl called and distracted the whole process


last main is housing with bearing 2.1666, shaft 2.1647, clearance .0019. thanks for your help

also i had no.5 in place of no 4 i have fixed my post sorry about that and thanks so much for the help this is golden bro..

[TheMadScientist]

np man

[cruz1383]

i was just wondering what bearings too put in so i get a target .0015 in all the way across. i dont want them this loose.

[DRFT]

to find what you want your target clearance to be for that main do this calculation

bore/journal = X
X - target clearance
= Y
Y/2 = your color bearing you will need for that target clearance

thats the calculation I used for mine since Mine was way out of spec so I needed all blues to reach a target clearance of .0014"