
| ENGINE BEARINGS | ||
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CON ROD BEARING SET |
|
| Part# | ||
| 4B7820H |
4B7820HX |
|
| Sizes | STD, .25, .50 | STD |
| Oil Clearance | Standard | + 0.001" Extra |
| Half Type | Identical Halves | |
| Material |
Tri-metal Hardened steel backs |
|
| Min Std Shaft Size |
1.8898 in / 48.000 mm |
|
| Max Std Shaft Size | 1.8905 in / 48.020 mm | |
| Min Std Tunnel Size | 2.0310 in / 51.587 mm | |
| Max Std Tunnel Size | 2.0315 in / 51.600 mm | |
| Max Wall at Crown | 0.0696 in / 1.768 mm | 0.0691 in / 1.755 mm |
| Max Overall Length |
0.807 in / 20.50 mm |
|
| Notes | ||
|
Diagram |
|
|

| ENGINE BEARINGS | ||
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CON ROD BEARING SET |
|
| Part# | ||
| 4B1925H |
4B1925HX |
|
| 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 |
1.7707in / 44.976mm |
|
| Max Std Shaft Size |
1.7717in / 45mm |
|
| Min Std Tunnel Size |
1.8898in / 48mm |
|
| Max Std Tunnel Size |
1.8898in / 48mm |
|
| Max Wall at Crown |
0.0591in / 1.502mm |
0.0586in /1.489mm |
| Max Overall Length |
0.6890in / 17.5mm |
|
| Notes | ||
|
Diagram |
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|

|
|||||||
| Quantity | 6 | ||||||
| Crankshaft | 44.991 / 44.973 | ||||||
| Housing | 48.001 / 48.016 | ||||||
| Max Wall | 1.491 | ||||||
| Max Length | 18.001 |

|
|
|||||||||||||
| Quantity | 4 | 1 | ||||||||||||
| Crankshaft | 55.001 / 54.986 | 55.001 / 54.986 | ||||||||||||
| Housing | 59.019 / 59.037 | 59.019 / 59.037 | ||||||||||||
| Max Wall | 1.999 | 1.994 | ||||||||||||
| Max Length | 19.200 | 23.000 |

|
|||||||
| Quantity | 4 | ||||||
| Crankshaft | 41.999 / 41.981 | ||||||
| Housing | 45.001 / 45.019 | ||||||
| Max Wall | 1.491 | ||||||
| Max Length | 18.100 |

|
|||||||
| Quantity | 4 | ||||||
| Crankshaft | 44.991 / 44.976 | ||||||
| Housing | 48.656 / 48.671 | ||||||
| Max Wall | 1.821 | ||||||
| Max Length | 22.601 |

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

| 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 |
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|
Engines BMW 2.0 2.3 2.5 (S14B20, S14B23, S14B25)

| 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 |
|
|
Engines BMW - 2.0 2.3 2.5 2.7 2.8 3.0 (M20B20, M20B25, M20B27, M50B20,
M50B25, M50B27, M52B20, M52B25, M52B28, M54B25, M54B22, M54B30)

Manufacturer: ACL Bearing Company
Part number: 4B1490H-0.25
For BMW - 1.6 1.8 1.9 (M40, M42, M43, M44)

| 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 |
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