S54 ACL Bearings
Tap right for info.
Standard Size Shells
This ACL bearings kit clearances that match the original specifications by BMW M.
Lead & Copper Trimetal
The ACL bearings are also made using the original 088/089 tri-metal lead and copper composition known for being softer on your crankshaft.
I recommend Genuine BMW bolts.
Learn more in your build journal entry.
Build Journal: Special Series
Total Recall.
BMW once (or twice) recalled bearings - AH!
First it was the oil pump, then the bearings. Atleast they cared back then!
As part of my Special Series on bulletproofing the S54, this entry touches on the recall's history and bolt nuances.
We button up the S54's bulletproofing by replacing the rod bearings with the ACL bearings.
Enjoy,
- Matt / @m3_epoustouflant
Get your ACL bearings kit
Bolts recommendations
I recommend that you use the Genuine BMW bolts.
The early generation S54s manufactured up to 12/13/2002 had M11x1.25mm rod bolts (SKU: 11247834310). They are distinguished by the bolt head.
The updated M10x1.25mm rod bolts (SKU: 11247834310) need to be replaced as they are stretch to yield.
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Been there, done that.
Been there, done that.
ACL RAcing series
Australian made.
ACL is recognized as a premier brand throughout the motorsports world and engine builders.
Their coated bearings combine ACL’s tough RACE Series lining and overlay metallurgy with Calico’s CT-1 coating.
CT-1 is a Dry Film Lubricant coating that helps reduce friction and abrasive wear. It provides intermittent dry lubrication and is not affected by dust or dirt.
It's what I run in my M engines.
