Mad Cow Disease

Are all ACL main bearings for B series engines the same? I feel they may not be. I used a b18a main bearing set for my b18c5. From what I understand the ACL bearings are roughly a honda green bearing. As far as my crank bearings go, the required colors are: brown, brown, green, green, and black. The colors are a maximum of 2 sizes away from green on the honda bearing chart. So, they should still be within spec. When I plastigauge I am right at .025mm for the main bores that require a brown bearing. I installed the main caps, and the crank would not spin. If indeed the ACL Main bearings for B series are all the same, do you have any ideas of why they are not within spec? And perhaps why the crank will not spin.

Hopefully that made sense, its late im tired, will give corrections tomorrow.

tim

BTW, my motor the crankshaft came from was running fine, just decided to do a performance rebuild.
And I followed the helms manual.


Modified by Mad Cow Disease at 7:31 AM 5/24/2004


Modified by Mad Cow Disease at 4:06 PM 5/24/2004


Modified by Mad Cow Disease at 6:39 PM 5/24/2004

Eluzion

Bump cuz I'd like to know as well.

MiKE 76...

All b-series main bearings are the same.

You put them in, and check the clearances w/ plastigauge.

If you don't get the right "spec" then swap and shuffle the bearings and try again.

earl

Arrows on the main caps pointing toward the oil pump? Using oil, not moly lube on your main bolts? Do you have your old mains...stick them back in and see if it spins again.

Mad Cow Disease

i used moly lube on the main cap bolts, and the main caps are on correctly. Will be trying out the stock bearings tonight.

THE GAME IS THICK

anyone else have experience with ACL Main/Rod bearings? Im about to buy some off ebay but would like to know before i bid on them.

earl

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mad Cow Disease &raquo;</TD></TR><TR><TD CLASS="quote">i used moly lube on the main cap bolts</TD></TR></TABLE>
That is your problem. You cannot use moly lube on main bearing bolts. Clean the bolts and clean the moly out the bolt holes. You must use regular oil as a lubricant. You have put too much force on the main caps and they are distorting.

Mad Cow Disease

I used, cleaned the moly out with brake cleaner, and used motor oil. 5-30. The Acl's dont clear, and the OEM do fit, so I will be using OEM's for the mains, and ACL's for the rods.

Thanks for your help guys.