EDIT: Labels are UNDER the pictures, ie: first picture is journal5, second #4, etc.


Journal #5

Journal #4

Journal #3

Journal #2

Journal #1

Need advice here. Was possibly thinking about getting the block line honed-- how much material would this take off normally? Bearings are all ACLs. What should I do? Is running .0010 clearance going to harm anything? I want the engine to last-- it will be putting down between 300-400WHP-- I'm not concerned about power freed from loose clearances.. just want it to last reliably.


Modified by ccivic at 11:45 PM 5/2/2006

 

dang some of those look like they are even tighter than .0010 i think at this point you might even be able to get away with running acl race bearings..
I think they some of those are way tight to run that thing reliably for a long time..

How many times have you measured them?

You should really try to get the plastigauge streight on the crank so it squshes it perfectly horizontally


Modified by Adi Radoncic at 10:48 PM 5/2/2006

 

Journal 3 and 2 are certainly NOT .001" clearance. They are tighter as indicated by the pics. Did you wipe down the journals and get ALL the oil off them and off the crank as well before you took these readings? Before anyone can offer you any kind of advice, we need to know what engine this is also.

 

Yeah.. 3&2 are tighter for sure. I wiped everything down good, I believe. What do you recommend wiping with? I used paper towels and brake-kleen. What are the clearances on the ACL Race bearings? Only measured once so far-- will measure again tomorrow.

Engine is a B18B1 with a B18A1 crank.

 

Paper towels and brake clean is perfect make sure the back of the bearings are clean too, measure the crank in 90deg intervals and report back to us..

If they are still really tight and u wanna stay with acls you can get a acl race bearing main set they loosen it up by .0010..

 

Take several readings, and as stated, make sure the plastigauge isn't crooked when you crush it. Also, don't use the ruler - measure the crush width with a caliper. Use this:

https://honda-tech.com/zerothread?id=1330955

Also, you might want to check your block/crank to see what color (size) bearings it was built with.

 

make sure when you're torquing the bolts/studs down that you're not moving the crank. if the crank is sitting up a few hundredths of an inch and it gets bound just right it will crush that plastigauge. I learned that the first time I used a Micrometer. on paper everything was right but the plastigauge said too tight. So I made sure the crank was down all the way before checking clearances.

 

If thats a stock crank, those clearances are normal (normally tight honda clearances). Honda specs go down to 0.0008" if I can remember correctly.

You need to be useing a larger bearing. Taking material off anywhere is not the correct solution. ACL's are equivalent to green bearings so you could go with a RED to give you ~0.0012". If you still want more than that THEN you can go with an align hone.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by stizzit &raquo;</TD></TR><TR><TD CLASS="quote"> If you still want more than that THEN you can go with an align hone.</TD></TR></TABLE>

Its called a line hone, not an align hone.

 

Talked to earl last night. Am going to check clearances again-- if they come out the same, I'll be ordering a set of ACL race bearings for the mains from him, which would give me around .0018 clearance on average. I'm going to check the rods while I'm at it-- those should fit fine, but we'll see :: crosses fingers ::. I'll keep you guys updated. Thanks for the help.

Also: How do you best keep the crank from moving while plastigauging?

Thanks a lot guys

 

Just replastigauged. This time I THOROUGHLY cleaned everything.. even desgreased and oiled the main bolts. Clearances came out a lot better. Only concern now is #5, which looks to be around .0008, and #3 which now is a little smaller than what #2 used to be. I found some gunk (oily kind of residue) under there when I took out the crank and such.. so I'm assuming that's what made my results bunk.

On #3 on the bearing that sits in the block, there was a spec of something-- no idea what it was. I got it out (wiped off with a paper towel a few times) but there is still a mark-- I think this is throwing off my reading. Pretty sure it's just in the coating; is there anything I can do smooth it down? I haven't tried to catch it with my fingernail, as I don't want to get any body oil on the bearing. Helpppp. I'll get pics of new clearances up in a couple minutes.

 

NEW RESULTS
--JOURNAL1


--JOURNAL2


--JOURNAL3


--JOURNAL4


--JOURNAL5


--JOURNAL3 BEARING

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hybrid93Eg &raquo;</TD></TR><TR><TD CLASS="quote">

Its called a line hone, not an align hone.</TD></TR></TABLE>


I don't know what's funnier, the fact that you made a post strictly to correct him, of the fact that your are completely wrong...

https://honda-tech.com/zerothread?id=218565

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EnzoSpeed &raquo;</TD></TR><TR><TD CLASS="quote">


I don't know what's funnier, the fact that you made a post strictly to correct him, of the fact that your are completely wrong...

https://honda-tech.com/zerothread?id=218565

</TD></TR></TABLE>

http://www.allstates.com/Engin...CHINE

I dunno, maybe both?

 

Need advice on #3 bearing.. Also. Would .0010 clearance be okay to run on a 3-400WHP engine (little more on 3)?

This sound alright: Pinks on #3, and (1) yellow and (1) pink on #5, or both yellows on #5? I don't have access to a mic, so I can't measure and use that chart.. just have to go buy the paper measure.

Sorry for being a hassle :\


Modified by ccivic at 10:53 PM 5/4/2006

 

I was putting together my brothers motor, a darton MID deck sleeved block, and this same thing happened to us. Maybe one or two bearings came out to .0010, and the rest were tighter. Very similar to yours. We put the acl race expanded oil clearince bearings in and all the bearings came out between .0017 to .0019. one came to .0020 which is still within factory specs.

 

does it matter if 1 or 2 of the main bearing clearances are different from eachother but still within factory specs?

 

To the moon!