Engine Builders: Help Me Select The Correct Bearing Thickness/Color Code
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Engine Builders: Help Me Select The Correct Bearing Thickness/Color Code
After plastiguaging the main bearings I found that all 5 main bearings are a little too tight using the ACL standards (equivalent to OEM Greens). According to specs, journals #1,2,4,5 should range from .024~.042 mm. If you look closely all of my journals are tighter than .025 mm according to the plastigauge readings. I marked the plastiguage width with a pen on the actual plastiguage paper/readout, for visablility purposes. Take a close look, this seems to be the average for bearings: #1,2,4,5; with the exception of the middle journal #3: (The largest green segment equals .025mm on the plastigauge reading, if you can't make it out)
Journal #3 reads exactly .025 mm when it should read .030~.048mm according to specs. So all of the bearings are slightly too tight.
I am definately going to use a set of "looser" (thinner) OEM main bearings. My question is, Should I step down to a set of OEM "yellows" or "pinks"? I want to avoid buying more than one set of OEM main bearings in order to save some money and hassle. Any ideas on what color bearings should give me the optimal clearance range? Btw, this is for a daily driven street motor, looking for reliability rather than rebuilding after going down the 1320.
Here's a good link to bearing colors and their thickness: https://honda-tech.com/zerothread?id=715490
Journal #3 reads exactly .025 mm when it should read .030~.048mm according to specs. So all of the bearings are slightly too tight.
I am definately going to use a set of "looser" (thinner) OEM main bearings. My question is, Should I step down to a set of OEM "yellows" or "pinks"? I want to avoid buying more than one set of OEM main bearings in order to save some money and hassle. Any ideas on what color bearings should give me the optimal clearance range? Btw, this is for a daily driven street motor, looking for reliability rather than rebuilding after going down the 1320.
Here's a good link to bearing colors and their thickness: https://honda-tech.com/zerothread?id=715490
Joined: May 2006
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From: California, United States
Hmm. Looks like you might actually need Reds to hit the middle of the clearance range. What clearance are you trying to get to?
And OEM bearings are sold per journal set. So just buy one journal set to test. If it checks, you've already got one of the five you'll need.
And OEM bearings are sold per journal set. So just buy one journal set to test. If it checks, you've already got one of the five you'll need.
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From: USA
Re: (91SiZ6)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91SiZ6 »</TD></TR><TR><TD CLASS="quote">Hmm. Looks like you might actually need Reds to hit the middle of the clearance range. What clearance are you trying to get to?
And OEM bearings are sold per journal set. So just buy one journal set to test. If it checks, you've already got one of the five you'll need.</TD></TR></TABLE>
Good point, I'll look into purchasing a set of reds, anybody need a set ACL greens?
And OEM bearings are sold per journal set. So just buy one journal set to test. If it checks, you've already got one of the five you'll need.</TD></TR></TABLE>
Good point, I'll look into purchasing a set of reds, anybody need a set ACL greens?
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