Size Chart
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ACL 5M1913H-.25 is a main bearing set for the cataloged Honda F20C1, F20C2, F22C1 engine configurations. .25 mm journal repair-size designation. Confirm the required undersize journal diameter and assembled clearance with the engine builder.
H identifies the ACL Race Series family. Match the complete suffix to the required clearance, shell width and locating features.
ACL’s 2023 guide lists the 4B1912 rod-bearing family for F20C/F22C and H22A/H22Z, but their main bearings differ: F20C/F22C uses 5M1913; the guide lists 5M1957 mains and separate 1T1957 thrust washers for 1998-on H22A/H22Z. Match the exact engine and block configuration when choosing components.
| Manufacturer / Engine | Honda — F20C1 |
|---|---|
| Manufacturer / Engine | Honda — F20C2 |
| Manufacturer / Engine | Honda — F22C1 |
The engine-family list identifies catalog applications, not universal vehicle fitment. Confirm the exact engine version, crankshaft, rods, block and bearing location. Vehicle names and photos do not replace dimensional verification.
| Brand | ACL |
|---|---|
| Manufacturer Part Number | 5M1913H-.25 |
| Component | Main Bearing Set |
| Size Selection | .25 mm journal repair-size designation. Confirm the required undersize journal diameter and assembled clearance with the engine builder. |
| Catalog Family | ACL Race Series |
| Half Type | Identical halves |
| Catalog Size Options | STD, .025, .25 |
Confirm the set contents, bearing positions and any separate thrust components against the complete manufacturer number. The photo is representative of the part family.
Measure shaft journals, housing bores and assembled oil clearance using the engine builder’s specification. Check oil-hole alignment, groove placement and crankshaft fillet clearance before final assembly. Catalog standard dimensions must not be treated as the finished dimensions for a different repair size. ACL specifies that abrasive pads or paper must not be used on the bearing surface to alter oil clearance.
Is the year and model enough to choose this bearing? No. Match 5M1913H-.25 to the exact engine and measured build specification.
What size is this listing? .25 mm journal repair-size designation. Confirm the required undersize journal diameter and assembled clearance with the engine builder.
Can I substitute a different suffix? Compare the complete grade, size, locating features and assembled clearance before substituting any bearing.
For the F20C/F22C application, see ACL 4B1912H-.25 rod bearings. This is a separately sold component with its own measured journal clearance; confirm the exact engine and size before pairing parts.
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