YSSNIUTOOL Camshaft Holding & Timing Alignment Kit for Ford 3.5L EcoBoost (7-Piece) with RT11 Cylinder Head Screw Socket

YSSNIUTOOL 303-1655 is a seven-piece camshaft holding and timing alignment kit with a 1/2" cylinder head screw removal socket designed specifically for the upgraded Ford 3.5L EcoBoost V6 engines (Ford GT, F-150, Expedition, Lincoln Navigator).

This precision alignment set provides the fixtures and the unique RT11 socket you need to lock camshafts and remove cylinder head screws when servicing the upgraded 3.5L V6 EcoBoost (note: it does not fit the older 3.5L 4V version). Built to mirror the OEM 303-1655 specification, the kit helps technicians and DIYers maintain accurate timing positions, reduce rework, and protect expensive engine components during maintenance.

How does this kit secure camshafts for timing work?

The set includes purpose-made pins and a holding plate sized to lock camshafts in their correct timing positions so you can safely remove or install timing components. The tools interface directly with factory timing locations to prevent cam rotation.

• Includes multiple alignment pins to fit both intake and exhaust lobes.
• Holds camshafts in OEM timing position during belt/chain service.
• Machined to tight tolerances to minimize slop and ensure repeatable placement.

What vehicles and engine versions are compatible with this tool?

This kit is designed for the upgraded Ford 3.5L V6 EcoBoost engine family. Confirm engine type before purchase because the older 3.5L 4V engines require a different tool. Compatibility is confirmed for specific model years and trims.

• Compatible: Ford GT (2017–2019), F-150 (2017–2019), Expedition (2018–2019), Lincoln Navigator (2018–2019).
• Engine fitment: 3.5L V6 EcoBoost upgraded engine only.
• Not compatible with 3.5L 4V (older version) — use part 303-1248 for that engine.

What does the included RT11 socket do and why is it special?

The kit contains an RT11 cylinder head screw removal socket with a 1/2" drive and a wide-sided hexagonal plum head shape that fits the unique fasteners on these Ford engines. It lets you remove stuck or factory-style cylinder head screws without damaging the head or screw head faces.

• 1/2" drive RT11 socket designed for Ford 3.5L and compatible 3.7L fasteners.
• Wide hex profile prevents rounding and improves torque transfer.
• Useful for stubborn screws encountered during head removal or service.

How precise and durable is the YSSNIUTOOL 303-1655 compared to OEM tools?

Manufactured to match the OEM 303-1655 reference, the kit offers high-precision machining and material choices aimed at professional and enthusiast use. Tolerances are set to maintain alignment accuracy while resisting deformation from workshop use.

• OEM-equivalent part number: 303-1655 for accurate fit and operation.
• Hard-wearing finishes and tight machining tolerances for longevity.
• Compact case or set organization keeps components identifiable and ready for service.

Who is this for: This alignment and removal kit is intended for automotive technicians, performance shops, and knowledgeable DIY mechanics who work on Ford vehicles equipped with the upgraded 3.5L V6 EcoBoost. If you service timing components, replace cylinder heads, or perform major engine work on the listed model years, this toolset gives you the proper fixtures and the RT11 socket to complete jobs with OEM-level fitment. If your vehicle uses the older 3.5L 4V engine, choose the alternative 303-1248 toolset instead. For any product issues, YSSNIUTOOL offers customer support to help with fitment questions and after-sales assistance.