Rod bearing clearances too tight!!

Thread Tools
 
Search this Thread
 
Old Sep 3, 2011 | 11:31 AM
  #1  
90ZCREX's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Apr 2004
Posts: 172
Likes: 0
From: Columbia, SC
Default Rod bearing clearances too tight!!

Heres the setup:

a6 block
y8 head
eagle rods
vitara pistons
acl race bearings
bored to 75.5mm

I'm assembling the shortblock right now and checking bearing clearances with plastigauge. Main bearing clearances look all good at around .0017-.0018.
But all the rod bearings are measuring out at a little less than .001 looks like about .0007-.0008. Way too tight right?

So I guess I'm gonna have to go with oem bearings for the rods,
Can anyone help me figure out which bearings I'm gonna need?
The acl's are supposed to be standard which are green correct?
Reply
Old Sep 3, 2011 | 11:41 AM
  #2  
rich7777's Avatar
Honda-Tech Member
 
Joined: Nov 2008
Posts: 3,379
Likes: 0
From: Birmingham, UK
Default Re: Rod bearing clearances too tight!!

I'd just take the rods to a machine shop and get them resized using those bearings. I'm not sure if you'll be able to hit a sensible clearence using the smallest honda bearing.
Reply
Old Sep 3, 2011 | 11:55 AM
  #3  
90ZCREX's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Apr 2004
Posts: 172
Likes: 0
From: Columbia, SC
Default Re: Rod bearing clearances too tight!!

Why would the clearances be out this much? Rods machined wrong?
Reply
Old Sep 3, 2011 | 01:36 PM
  #4  
90ZCREX's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Apr 2004
Posts: 172
Likes: 0
From: Columbia, SC
Default Re: Rod bearing clearances too tight!!

I plastigauged a different set of fj rods on the crank and I'm right at .001 clearance. Can a machine shop take some material off the crank? Like .001 so that would put my clearances to . 0018 or .0019? or should I just get the rods bored out a little?
Reply
Old Sep 3, 2011 | 04:10 PM
  #5  
bigsnorlax's Avatar
Honda-Tech Member
 
Joined: Sep 2008
Posts: 558
Likes: 1
From: Richmond, Va, Henrico
Default Re: Rod bearing clearances too tight!!

Get the rods to a machine shop for a light hone to your specs. IMO dont fool with those stock cranks unless you REALLY have to.
Reply
Old Sep 3, 2011 | 05:00 PM
  #6  
90ZCREX's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Apr 2004
Posts: 172
Likes: 0
From: Columbia, SC
Default Re: Rod bearing clearances too tight!!

Well, I've been looking around on the net and I've found the acl hx bearings which are supposed to be .001 thinner to give you that much more clearance. These would put me right at .0018 or so. I think I'll try them before I pull the rods back out.
Reply
Old Sep 3, 2011 | 05:12 PM
  #7  
shanebadoo's Avatar
Honda-Tech Member
 
Joined: Aug 2009
Posts: 158
Likes: 0
From: Barbados, Caribbean
Default Re: Rod bearing clearances too tight!!

Exactly what I did. got the hx acl bearings and clearances were much better.
Reply
Old Sep 3, 2011 | 11:47 PM
  #8  
rich7777's Avatar
Honda-Tech Member
 
Joined: Nov 2008
Posts: 3,379
Likes: 0
From: Birmingham, UK
Default Re: Rod bearing clearances too tight!!

Originally Posted by 90ZCREX
Why would the clearances be out this much? Rods machined wrong?
Yep & maybe the crank journal sizes. You could try those other acl bearings if you wanted.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
dieselwilly
Honda Civic (2001 - 2005)
1
Nov 23, 2014 03:20 PM
cjonescrx
All Motor / Naturally Aspirated
10
Aug 2, 2012 04:41 AM
SlowPokeEg
Honda Civic / Del Sol (1992 - 2000)
9
Feb 29, 2012 09:08 AM
y7turbo
Forced Induction
23
Nov 1, 2007 08:21 PM
nkymain
All Motor / Naturally Aspirated
11
Sep 22, 2005 01:25 PM




All times are GMT -8. The time now is 07:56 AM.