Description
PAI 642020 is an oil pan isolator bolt assembly for Detroit Diesel Series 60 12.7L and 14.0L engines, replacing Detroit 23522281. The bolt clamps the oil pan to the cylinder block while the rubber grommet isolator damps engine vibration to prevent fatigue cracking of the pan flange. Bolt length is 2-7/16 in; rubber grommet OD is 1-7/16 in. Sold individually.
Specifications
| Manufacturer | PAI Industries |
|---|---|
| Part Number | 642020 |
| Part Type | Oil Pan Isolator Bolt Assembly (bolt + rubber grommet) |
| Engine Compatibility | Detroit Diesel Series 60 (12.7L & 14.0L) |
| Bolt Length | 2-7/16 in |
| Grommet OD | 1-7/16 in |
| Sold As | Each (Series 60 oil pan uses multiple isolator bolts) |
Cross References
This oil pan isolator bolt assembly replaces or is equivalent to the following part numbers:
- Detroit Diesel: 23522281
- PAI Industries: 642020
Applications
This isolator bolt assembly fits the following engines:
- Detroit Diesel Series 60 12.7L (1987–2007)
- Detroit Diesel Series 60 14.0L (1998–2007)
Representative vehicles using these engines:
- Freightliner Century, Columbia, Classic, FLD, Coronado (Series 60 era)
- Western Star 4900, 5900, 6900 (Series 60 era)
- Sterling LT9500, A-Line, AT9500 (Series 60 era)
Verify the bolt length and grommet OD against your existing isolators before ordering — DD13 / DD15 / DD16 use a different oil pan mounting design.
