ef8sleepr

1991 honda civic si sohc zc/d16a6... need the torque specs for the main bearing cap..

fridaytech

10x1.25 main bolt torque spec is 55nm / 6.5 kg-m / 47 ft-lb

make sure to put oil on bolt threads and washers

also after torquing each cap rotate engine ofter to check for binding

hope that helps

ef8sleepr

i have the same specs on my chilton book but it keeps binding... not sure what's wrong...

fridaytech

Different sizes of main bearings may be present in the same engine. To find the correct bearing size for each journal, use the provided chart to properly reference the code markings on block and crankshaft

fridaytech

basically there are about four different size main bearings.... you have to figure out which journal needs which size. kind of a pain in the *** but thats how these engines are

ef8sleepr

but doesn't main bearings comes in a set???

fridaytech

yes they come in a set usually standard size but you can order individual bearings buy color chart. your repair manual may have the main bearing color chart in it..

ef8sleepr

any good sites that sells individual sets??

Janos Lin

Let me put it this way, the "sets" are usually like ACL, or whatever, those are middle of the road sizes, or green according to the factory chart.

You can only get individual bearings from Honda themselves and they cost quite a bit more once you get all 10 halves, but you can be assured of having consistent and known oil clearences.

Janos

ef8sleepr

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Janos Lin &raquo;</TD></TR><TR><TD CLASS="quote">Let me put it this way, the "sets" are usually like ACL, or whatever, those are middle of the road sizes, or green according to the factory chart.

You can only get individual bearings from Honda themselves and they cost quite a bit more once you get all 10 halves, but you can be assured of having consistent and known oil clearences.

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

ic... but if i just want a set from the parts store which size should i get?? i plastigauge the clearance and my results were .003 in. and the specs on the repair manual says .0010-.0014 on 1&5 journals, 2&4 .0010-.0017, and 3 is .0012-.0019... that's way big right?? so i need undersize bearings??? help me out! and the plastigauge came with 2 colors, i used the red... is that the one i should use???

Janos Lin

The sets only comes in ONE size, green. If you want some other size, you have to buy honda bearings. Yes you need to tighten them down some or you'll have too much oil coming out.

You should be using green plastigage. The red one is thicker, and has a different scale.

Janos

amthompson

https://honda-tech.com/zerothread?id=1169414

According to this thread, the main cap is 33 ft/lbs

This is the info i followed and i had no binding and havent had any problems with spun bearings or anything.

ef8sleepr

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by amthompson &raquo;</TD></TR><TR><TD CLASS="quote">https://honda-tech.com/zerothread?id=1169414

According to this thread, the main cap is 33 ft/lbs

This is the info i followed and i had no binding and havent had any problems with spun bearings or anything. </TD></TR></TABLE>

hey thanks, i'm going to plastigauge it and double check with that amount of torque and i'll give it a try...

EDIT: I tried it and it is between specs with the green plastigauge and no binding:-D

amthompson

So 33 ft/lbs worked?