Description Cylinder Head Bolt Kit for Cummins ISX / ISX15 Engine The Cylinder Head Bolt Kit MCBISXHBK is engineered for use in Cummins ISX and ISX15 engines. Designed to deliver the correct clamping force and maintain cylinder head sealing, these high-strength bolts ensure durability, reliability, and proper engine performance during head replacement or overhaul. Key Features Application: Cummins ISX & ISX15, X15 engines OEM Reference: MCBISXHBK Durability: Heat-treated for strength and fatigue resistance Fitment: Direct replacement—no modifications required Reliability: Ensures even torque and leak-free head gasket sealing When to Use This Kit Head bolts on Cummins ISX/ISX15 engines are torque-to-yield fasteners. They should always be replaced when the cylinder head is removed or when installing a new ISX15 head gasket set. Using new bolts prevents improper torque, sealing failures, and premature engine damage. Frequently Asked Questions How many bolts are included in the ISX15 head bolt kit? The MCBISXHBK kit includes a complete set of cylinder head bolts required for one Cummins ISX/ISX15 engine. Exact quantity matches OEM specifications. Should I replace ISX cylinder head bolts every time I remove the head? Yes. Cummins ISX/ISX15 head bolts are torque-to-yield. They stretch when tightened and must be replaced with new ones to ensure proper torque and clamping force. What are the torque specs for Cummins ISX15 head bolts? Tightening torque for ISX15 head bolts varies by service manual and sequence. Always follow the official Cummins repair manual for the correct step-by-step torque and angle procedure. What’s the difference between head bolts and head studs for ISX engines? Head bolts are standard OEM fasteners included in this kit. Head studs (aftermarket option) can provide stronger clamping in high-performance builds, but bolts are the factory-specified solution for ISX/ISX15 engines. Looking for a complete Cummins ISX15 head gasket kit to go with these bolts? Call 888-642-6460 or email [email protected] for expert assistance.
