Description
Mercedes-Benz OM646 Cylinder Head Semi-Assembly – Valves Pre-Installed
This OM646 cylinder head semi-assembly is a brand new, factory-fresh cylinder head built to OEM standards. It comes with the valve train components pre-installed, including intake and exhaust valves, valve springs, valve stem seals, spring seats and retainers. You simply transfer your existing camshafts, hydraulic lifters and external accessories from your old head – saving time and labour during installation.
The OM646 is a 2.2-litre 4-cylinder common-rail turbo diesel engine widely used in Mercedes-Benz commercial vehicles and passenger cars. This head is manufactured to exact original tolerances and pressure-tested for reliable, long-lasting performance.
Please note: The Mercedes part numbers 6540106912 and 6540107012 are commonly associated with the newer OM654 engine family. If your engine is an OM646, please double-check the original part number on your existing head to ensure correct fitment.
What’s Included – Cylinder Head Semi-Assembly
This listing is for the cylinder head with the following components pre-installed and ready to use:
- Cylinder head casting – precision-machined, pressure-tested
- 16 valves – intake and exhaust valves, heat-resistant (4 per cylinder)
- Valve springs, spring seats and retainers
- Valve stem seals (already fitted)
- Valve guides (pressed in)
- Core plugs and oil gallery plugs (installed)
- Valve clearances pre-set where applicable
Note: This is a semi-assembly, so the following components are NOT included and must be transferred from your original cylinder head or purchased separately:
- Camshafts (intake and exhaust)
- Hydraulic lifters / tappets
- Valve cover / rocker cover
- Timing chain, tensioner and guides
- Fuel injectors and glow plugs
- Intake and exhaust manifolds
- Turbocharger
- All external sensors and actuators
Vehicle Compatibility
The OM646 2.2L diesel engine was fitted to a wide range of Mercedes-Benz models. Always verify your engine code and OEM part number before purchase. Common applications include:
- Mercedes-Benz Sprinter (W906) – 209 CDI, 211 CDI, 213 CDI, 216 CDI, 309 CDI, 311 CDI, 313 CDI, 316 CDI, 409 CDI, 411 CDI, 413 CDI, 416 CDI
- Mercedes-Benz Vito / Viano (W639) – 109 CDI, 111 CDI, 113 CDI, 115 CDI, 116 CDI
- Mercedes-Benz C-Class (W203/W204) – C 200 CDI, C 220 CDI, C 250 CDI
- Mercedes-Benz E-Class (W210/W211) – E 200 CDI, E 220 CDI, E 250 CDI
- Mercedes-Benz M-Class (W164) – ML 250 CDI, ML 280 CDI, ML 300 CDI
- Mercedes-Benz G-Class (W463) – G 250 CDI, G 280 CDI, G 300 CDI
- Other vehicles equipped with the OM646 engine (confirm via OEM number)
Technical Specifications
| Engine Code | OM646 |
| Displacement | 2.2 Litre (2148 cc) – typical variant |
| Configuration | Inline 4-cylinder, DOHC 16-valve |
| Fuel Type | Diesel |
| Valvetrain | Double overhead camshaft, 4 valves per cylinder |
| Condition | Brand New – Cylinder Head Semi-Assembly |
| OEM Part Numbers | AMC 908374 / 908474 / Mercedes-Benz 6540106912 / 6540107012 |
| Warranty | 18 months |
Why Choose This OM646 Cylinder Head Semi-Assembly
- 100% brand new – never reconditioned or repaired
- Pressure-tested for leaks and cracks
- OEM-grade materials and exact machining tolerances
- Pre-installed valves save hours of fitting time
- Comes with an 18-month warranty for peace of mind
- Packed in a reinforced crate for safe international freight
- Fast global shipping to port or door
If you need a Mercedes OM646 cylinder head for sale or a replacement head with valves pre-installed, this semi-assembly gives your engine a factory-fresh start. Order now for a reliable, direct-fit solution.
More Cylinder Heads & Quick Contact
- Browse more cylinder heads: View our complete cylinder head catalog for Mercedes and BMW.
- Need help? Contact us directly on WhatsApp for fast compatibility checks and shipping quotes.
Additional Technical Resources
- Mercedes-Benz OM646 engine on Wikipedia – technical background.
- OM646 engine specifications at engine-specs.net – detailed data.
