Photo shown for illustration; shade and shape may differ slightly.
ACL Main Bearing Set for BMW M40B16, M40B18, M42B18, M43B16, M43B18, M43B19, M44B19 316, 318, Z3, Size STD HX
ACL Race Series main bearing set for the BMW M40B16, M40B18, M42B18, M43B16, M43B18, M43B19, M44B19 316, 318, Z3 engine, size STD HX: for journals at the factory size, with 0.025 mm more oil clearance than the STD set.
Specifications
| Manufacturer | ACL |
| Series | Race Series |
| Type | Main bearings (crankshaft) |
| Engine | BMW M40B16, M40B18, M42B18, M43B16, M43B18, M43B19, M44B19 316, 318, Z3 |
| Size | STD HX |
| ACL part number | 5M1538HX-STD |
| Packaging | Set sealed by the manufacturer |
Engine fitment
- BMW M40B16, M40B18, M42B18, M43B16, M43B18, M43B19, M44B19 316, 318, Z3
- For the same engine: ACL rod bearings
What to check
- Choose the size from the journal measurement made by the shop that machined the crankshaft, not from the old set
- The set is sold sealed by the manufacturer: check the part number and the size before you open it
- HX is not an upgrade: the oil clearance is set by the journal and the bore, and the set only fills what is left