26PCS Cylinder Head Bolt Kit for Cummins ISX ISX15 X15 | 3678506 3678804
26PCS Cylinder Head Bolt Kit for Cummins ISX ISX15 X15 | 3678506 3678804
Overview
This 26-piece aftermarket Cylinder Head Bolt Kit is designed for select Cummins ISX, ISX15, and X15 heavy-duty diesel engines, including compatible dual-cam and single-cam engine configurations.
The kit includes two different lengths of cylinder head bolts for securing the cylinder head to the engine block. It is intended for cylinder head replacement, engine overhaul, and professional diesel engine repair.
Manufactured as a replacement for the specified original bolt configurations, this complete 26-piece set provides a convenient solution for diesel engine maintenance.
Package Includes: 26 Cylinder Head Bolts (22 Standard-Length Bolts + 4 Long Bolts).
Fitment
| Engine Model | Camshaft Configuration | Engine Generation | Compatibility |
|---|---|---|---|
| Cummins ISX 15L | Dual Cam | CM570 | Selected Applications |
| Cummins ISX 15L | Dual Cam | CM870 | Selected Applications |
| Cummins ISX 15L | Dual Cam | CM871 | Selected Applications |
| Cummins ISX15 | Single Cam | CM2250 | Selected Applications |
| Cummins ISX15 | Single Cam | CM2350 | Selected Applications |
| Cummins X15 | Single Cam | Selected Configurations | Verify by Engine Serial Number |
Important Fitment Notice: This kit is intended for engine configurations that require the corresponding 3678506 and 3678804 cylinder head bolt specifications.
Not all engines within the ISX, ISX15, or X15 families use identical cylinder head fasteners. Always verify compatibility using the engine serial number (ESN), original part numbers, and required bolt dimensions before ordering.
What's Included
-
22 × Standard Cylinder Head Bolts
Reference OE: 3678506
Reference Size: M18 × 1.5 × 170 mm -
4 × Long Cylinder Head Bolts
Reference OE: 3678804
Reference Size: M18 × 1.5 × 225 mm
Total Quantity: 26 Pieces
Note: Bolt dimensions are reference specifications. Please confirm actual product measurements and thread specifications before installation.
Why It's Better
- Complete 26-Piece Kit: Includes the two bolt lengths required for compatible cylinder head installations.
- Dual & Single Cam Applications: Suitable for selected Cummins ISX dual-cam and ISX15/X15 single-cam engine configurations.
- Aftermarket Replacement: Provides a replacement option for engine configurations using the specified OE bolt types.
- Convenient Engine Repair Solution: Supplies the required bolt assortment in one package for compatible cylinder head service.
Specifications
| Product Type | Cylinder Head Bolt Kit |
|---|---|
| Engine Brand | Cummins |
| Compatible Engine Families | ISX / ISX15 / X15 (Selected Applications) |
| Engine Displacement | 15.0L |
| Camshaft Configuration | Dual Cam / Single Cam (Application Dependent) |
| Reference OE Numbers | 3678506, 3678804 |
| Standard Bolt Quantity | 22 Pieces |
| Long Bolt Quantity | 4 Pieces |
| Total Quantity | 26 Pieces |
| Condition | New Aftermarket |
| Application | Cylinder Head Installation and Engine Repair |
Shipping & Warranty
Shipping: Available shipping methods, delivery estimates, and applicable charges are displayed at checkout.
Bulk Orders: Contact us for information about larger quantity orders and shipping arrangements.
Warranty: Warranty coverage is subject to the seller's published warranty terms and conditions.
FAQ
1. Does this kit fit both dual-cam and single-cam Cummins engines?
Yes, the referenced bolt combination is used in selected Cummins ISX dual-cam and ISX15/X15 single-cam engine applications. Compatibility must be verified using the engine serial number and original bolt specifications.
2. How many bolts are included?
The kit contains 26 cylinder head bolts: 22 standard-length bolts and 4 longer bolts.
3. What are the reference OE numbers?
The primary reference OE numbers are 3678506 and 3678804.
4. Does this kit include a cylinder head gasket?
No. This product contains cylinder head bolts only. Cylinder head gaskets and other engine components are sold separately unless otherwise specified.
5. Can these bolts be reused?
Always follow the applicable Cummins service manual for fastener replacement requirements, installation procedures, tightening sequence, and torque specifications.
6. How can I confirm fitment?
Please provide your engine serial number (ESN) and original cylinder head bolt part numbers. Confirm bolt length, thread size, and required quantity before purchase.
Disclaimer
This product is an aftermarket replacement component and is not represented as a genuine Cummins-manufactured part.
Cummins, ISX, ISX15, X15, and related names are trademarks of their respective owners and are used solely for compatibility identification.
Engine family, model, and production year alone do not guarantee fitment. Always verify the engine serial number, original part numbers, and bolt specifications before ordering.
Professional installation is recommended. Use the appropriate manufacturer service procedures and tightening specifications.