
| Position | Connecting rod: 1, 2, 3, 4 |
||||||
|---|---|---|---|---|---|---|---|
| Pairs & Part Numbers |
|
||||||
| Quantity | 4 | ||||||
| Crankshaft Diameter | 51.971 / 51.953mm | ||||||
| Housing Diameter | 55.001 / 55.009mm | ||||||
| Max Wall Thickness | 1.501mm | ||||||
| Max Length | 17.000mm |

|
|||||||
| Quantity | 4 | ||||||
| Crankshaft | 48.986 / 48.971 | ||||||
| Housing | 51.999 / 52.012 | ||||||
| Max Wall | 1.496 | ||||||
| Max Length | 19.271 |

| ENGINE BEARINGS | ||
![]() |
CON ROD BEARING SET |
|
| Part# | ||
| 4B8296H |
4B8296HX |
|
| Sizes | STD, .025, .25, .50 | STD |
| Oil Clearance | Standard | + 0.001" Extra |
| Half Type | Identical Halves | |
| Material |
Tri-metal Hardened steel backs |
|
| Min Std Shaft Size |
2.0466in / 51.984mm |
|
| Max Std Shaft Size |
2.0472in / 51.000mm |
|
| Min Std Tunnel Size |
2.1654in / 55.000mm |
|
| Max Std Tunnel Size |
2.1661in / 55.020mm |
|
| Max Wall at Crown |
0.0591in / 1.500mm |
0.0585in / 1.487mm |
| Max Overall Length |
0.6496in / 16.50mm |
|
| Notes | Suits 52mm journal only | |
|
Diagram |
![]() |
|

| Position | Connecting rod: 1, 2, 3, 4, 5, 6 |
||||||
|---|---|---|---|---|---|---|---|
| Pairs & Part Numbers |
|
||||||
| Quantity | 6 | ||||||
| Crankshaft Diameter | 48.992 / 48.974mm | ||||||
| Housing Diameter | 53.000 / 53.015mm | ||||||
| Max Wall Thickness | 1.994mm | ||||||
| Max Length | 18.100mm |

|
|||||||
| Quantity | 5 | ||||||
| Crankshaft | 54.795 / 54.785 | ||||||
| Housing | 58.730 / 58.745 | ||||||
| Max Wall | 1.946 | ||||||
| Max Length | 18.499 |

| 3 | 1,2,4,5 | |||||||||||||
| Pairs & PN |
|
|
||||||||||||
| Quantity | 1 | 4 | ||||||||||||
| Crankshaft | 57.000 / 56.980 | 57.000 / 56.980 | ||||||||||||
| Housing | 61.001 / 61.021 | 61.001 / 61.021 | ||||||||||||
| Max Wall | 1.991 | 1.991 | ||||||||||||
| Max Length | 29.060 | 23.061 |

|
|||||||
| Quantity | 6 | ||||||
| Crankshaft | 53.978 / 53.957 | ||||||
| Housing | 56.799 / 56.820 | ||||||
| Max Wall | 1.402 | ||||||
| Max Length | 16.901 |

| ENGINE BEARINGS | ||
![]() |
CON ROD BEARING SET |
|
| Part# | ||
| 4B1185H |
4B1185HX |
|
| Sizes | STD,.025, .25 | STD |
| Oil Clearance | Standard | + 0.001" Extra |
| Half Type | Upper & Lower | |
| Material |
Tri-metal Hardened steel backs |
|
| Min Std Shaft Size |
1.7709in / 44.981mm |
|
| Max Std Shaft Size |
1.7715in / 44.996mm |
|
| Min Std Tunnel Size | 1.8897in / 47.998mm | |
| Max Std Tunnel Size |
1.8905in / 48.019mm |
|
| Max Wall at Crown |
0.0586in / 1.488mm |
0.0581in / 1.475mm |
| Max Overall Length |
0.8307in / 21.10mm |
|
| Notes | ||
|
Diagram |
![]() |
|

Hersteller: ACL Bearing Company
Modell: 4B1490H-0.25
BMW - 1.6 1.8 1.9 (M40, M42, M43, M44)

| ENGINE BEARINGS | ||
![]() |
CON ROD BEARING SET |
|
| Part# | ||
| 6B1490H |
6B1490HX |
|
| Sizes | STD, .025, .25, .50 | STD |
| Oil Clearance | Standard | + 0.001" Extra |
| Half Type | Identical Halves | |
| Material |
Tri-metal Hardened steel backs |
|
| Min Std Shaft Size |
1.7707in / 44.975mm |
|
| Max Std Shaft Size |
1.7713in / 44.991mm |
|
| Min Std Tunnel Size |
1.8898in / 48.000mm |
|
| Max Std Tunnel Size |
1.8904in / 48.016mm |
|
| Max Wall at Crown |
0.0588in / 1.493mm |
0.0583in / 1.481mm |
| Max Overall Length |
0.709in / 18.00mm |
|
| Notes | ||
|
Diagram |
|
|

| ENGINE BEARINGS | ||
![]() | CON ROD BEARING SET | |
| Part# | ||
| 4B1568H | 4B1568HX | |
| Sizes | STD, .025, .25 | STD |
| Oil Clearance | Standard | + 0.001" Extra |
| Half Type | Identical Halves | |
| Material | Tri-metal Hardened steel backs | |
| Min Std Shaft Size | 1.8888in / 47.975mm | |
| Max Std Shaft Size | 1.8894in / 47.9911mm | |
| Min Std Tunnel Size | 2.0472in / 52.000mm | |
| Max Std Tunnel Size | 2.0478in / 52.015mm | |
| Max Wall at Crown | 0.0785in / 1.993mm | 0.0780in / 1.980mm |
| Max Overall Length | 0.787in / 20.00mm | |
| Notes | .. | |
Diagram | ![]() | |
Engines BMW 2.0 2.3 2.5 (S14B20, S14B23, S14B25)

|
|||||||
| Quantity | 4 | ||||||
| Crankshaft | 50.808 / 50.787 | ||||||
| Housing | 53.896 / 53.914 | ||||||
| Max Wall | 1.537 | ||||||
| Max Length | 19.601 |