BMW M40, M42, M43, M44 Engine Bearings

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 ENGINE BEARINGS

CON ROD BEARING SET

MAIN BEARING SET

Part# Part#
4B1490H


4B1490HX

 
5M1538H

 
5M1538HX

 
Sizes STD, .025, .25, .50 STD STD, .025, .25, .50 STD
Oil Clearance Standard + 0.001" Extra Standard + 0.001" Extra
Half Type Identical Halves Upper & Lower
Material

Tri-metal Hardened steel backs

Tri-metal
Min Std Shaft Size

1.7707in / 44.975mm

2.3611in / 59.971mm
Max Std Shaft Size

1.7713in / 44.991mm

2.3618in / 59.990mm
Min Std Tunnel Size

1.8898in / 48.000mm

2.5591in / 65.000mm
Max Std Tunnel Size

1.8904in / 48.016mm

2.5598in / 65.019mm
Max Wall at Crown

0.0588in / 1.493mm

0.0583in / 1.481mm

0.0980in / 2.490mm 0.0930in / 2.478mm
Max Overall Length

0.709in / 18.00mm

0.787in / 20.00mm #1,2,4,5

0.982in / 24.94mm #3 thrust

Notes

Diagram       
(Top View) 

 
Part# Material
Sizes Notes

 
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