Description
The ARP 251-3702 head bolt kit is listed for Ford Ecoboost 1.6L I4 Cylinder. The fasteners secure the cylinder head to the block; their application, installed length and preload must work with the chosen head and gasket arrangement.
Technical Highlights
- Manufacturer part number: 251-3702
- Application/configuration: Ford Ecoboost 1.6L I4 Cylinder
- Material: ARP2000
ARP2000 is an alloy steel that can be heat treated to a higher strength level than 8740. This material choice does not establish a horsepower limit; fastener selection must also account for the application and required preload.
Selection Guidance
Fastener preload supplies the clamping force at the head-to-block joint. Gasket sealing also depends on suitable deck finish, component condition and the correct assembly procedure.
Match the engine and any specified aftermarket cylinder heads or block to the listed configuration. Do not assume that related engines use the same fastener dimensions.
Installation Considerations
Check block threads, fastener engagement and cylinder-head clearance during trial assembly. Follow the instructions for this exact part number, including lubricant locations, washer orientation and tightening sequence. Washer seating and lubrication requirements vary by kit.