Mercedes Sprinter Cylinder Head Bolt Kit – Elring | NCV3 3.0L OM642 | #0039902522KIT (2007–2022)

Reusing cylinder head bolts on a Sprinter OM642 after removal risks head gasket failure — these are torque-to-yield fasteners that stretch permanently when torqued to specification and cannot provide reliable clamping force a second time. This is the Elring cylinder head bolt kit for NCV3 and VS30 Sprinters equipped with the 3.0L OM642 V6 diesel engine, a set of 8 bolts covering one cylinder head — two kits are required for a complete V6 engine service.

What This Part Does

The cylinder head bolts clamp the cylinder head to the engine block, compressing the head gasket to create the sealed boundary between the combustion chambers, coolant passages, and oil passages. The OM642 uses torque-to-yield (TTY) head bolts — bolts that are intentionally stretched beyond their elastic limit during final torque, creating a more consistent and stable clamping load than conventional bolts that remain within their elastic range. This controlled stretch ensures the head gasket maintains uniform sealing pressure across all cylinder positions under the thermal cycling and combustion forces of diesel operation. Because the bolt yields permanently during installation, its ability to produce the same controlled stretch on a second installation is compromised — a used TTY bolt installed at the same torque specification will produce unpredictable and typically insufficient clamping force. The OM642 V6 has two cylinder heads, each requiring 8 bolts.

Common Reasons for Replacement

• Head gasket replacement requiring head removal and reinstallation
• Cylinder head removal for valve service, timing chain access, or coolant passage repair
• Engine rebuild where both heads are removed
• Head bolt found damaged, corroded, or cross-threaded during removal

When to Use

Replace head bolts every time the cylinder head is removed — without exception. Never reinstall torque-to-yield head bolts. The OM642 V6 has two banks with 8 bolts each — order two kits for a complete V6 engine service. Always follow the factory torque sequence and angle-tightening specification.

NCV3 & VS30 OM642 Specific — Engine Verification Required

This head bolt kit is for NCV3 and VS30 Sprinters equipped with the 3.0L OM642 V6 diesel engine. Always verify your engine code before ordering.

Fitment

• 2007–2018 Mercedes-Benz / Dodge / Freightliner Sprinter 2500 / 3500 – 3.0L OM642 (NCV3)
• 2019–2022 Mercedes-Benz Sprinter 2500 / 3500 – 3.0L OM642 (VS30)

✔ 8 bolts per kit — covers one cylinder head
✔ Two kits required for complete V6 engine service (both heads)
✔ Torque-to-yield — never reuse; replace every time the head is removed
✔ Follow factory torque sequence and angle specification

Part Numbers

• Mercedes OEM: 0039902522 / A0039902522 / 003-990-25-22
• Manufacturer: Elring — 372.940
• SKU: 0039902522KIT (COMES WITH 8 PCS)