PAI 040116 Cummins ISX/X15 Cylinder Head Bolt Kit
The PAI 040116 Head Bolt Kit is a complete premium aftermarket cylinder-head fastener set for select Cummins ISX, ISX15, X15 and QSX heavy-duty diesel engines. The kit includes all 26 bolts required to secure the cylinder head to the engine block and restore the correct, evenly distributed clamping force during a cylinder-head replacement, upper-engine repair or complete overhaul.
PAI manufactures the bolts to closely controlled dimensions for dependable sealing under the high cylinder pressures, operating temperatures and thermal cycling found in heavy-duty diesel service. Installing a complete new set helps reduce the risk of inconsistent bolt stretch, uneven head-gasket loading and premature sealing failure that can result from reusing fatigued or damaged fasteners.
Technical specifications
| Specification | Detail |
|---|---|
| Manufacturer | PAI Industries |
| Part number | 040116 |
| Product type | Complete cylinder-head bolt kit |
| Engine family | Cummins ISX, ISX15, X15 and select QSX |
| Common control modules | CM870, CM871, CM2250 and CM2350 |
| Engine configuration | Select single- and dual-cam engines |
| Total bolt quantity | 26 bolts |
| Thread size | M18 × 1.5 |
| Short-bolt length | 170 mm |
| Long-bolt length | 225 mm |
| Package dimensions | Approximately 11 × 8 × 4 in. |
| UPC | 193807164881 |
| Warranty | PAI two-year unlimited-mileage warranty |
Distributor application data identifies the kit for select 2002–2020 Cummins ISX-family single- and dual-cam engines, but the engine serial number and CPL should be checked before ordering because Cummins cylinder-head hardware can vary by engine generation and configuration.
Kit contents
| PAI part number | Cummins reference | Description | Quantity |
|---|---|---|---|
| 040136 | 3678506 | M18 × 1.5 × 170 mm cylinder-head bolt | 22 |
| 040137 | 3678804 | M18 × 1.5 × 225 mm cylinder-head bolt | 4 |
The complete kit contains 22 shorter bolts and four longer bolts, for a total of 26 cylinder-head fasteners.
Cross-references
- PAI 040116
- Cummins 3678506
- Cummins 3678804
- ISXHBK
- Alliant Power MCBISXHBK
- AFA Industries AFAISXHBK
- ATL Diesel ATLISXHBK
- Thorite ISXHBKTHO
