SKU: LIV823113
MPN: LPP823113
This Livernois Motorsports cam phaser lockout kit (LPP823113) is built for owners and builders working on Ford 4.6L and 5.4L 3-Valve modular engines. The factory variable cam timing system on these engines relies on hydraulic phasers that wear over time, leading to rattle, timing drift, and the occasional grenaded phaser. This kit locks the camshafts in a fixed position, removing that failure point and giving you predictable, repeatable cam timing. It's a common upgrade for trucks and Mustangs running aftermarket camshafts or higher-spring-pressure valvetrains, where the stock phasers are a known weak link.
Locking out the phasers fixes the cam timing at a set point rather than letting the engine vary it on the fly, which is what makes this a 5.4 3V mainstay for higher-output builds. The kit is designed to work alongside aftermarket camshafts and valve springs while keeping the rest of the timing system in place. When you run a lockout, the tune has to be adjusted to match the fixed timing position, so plan on a calibration change as part of the install. Pairing the lockout with upgraded valve springs and a fresh timing chain is a sensible approach when the front of the engine is already apart, since you're already in there.
Reach for this kit when you're chasing reliability on a high-mileage 3-Valve, building a power adder combination, or simply tired of phaser rattle on cold starts. It's well suited to towing trucks and street/strip Mustangs where consistent cam timing matters more than the small idle-quality trade of the factory variable system. Most installers tackle it during a timing job, so it's worth ordering the related wear parts at the same time. Browse the rest of our engine and components selection and our timing set options to round out the build in one order.
It locks the camshafts of a Ford 4.6L or 5.4L 3-Valve engine in a fixed position, removing the factory variable cam timing function. That eliminates the hydraulic phasers as a wear and failure point and gives you consistent, repeatable cam timing, which is preferred on engines running aftermarket cams or higher valve-spring pressures.
Yes. This Livernois Motorsports kit (LPP823113) is designed for the Ford 4.6L and 5.4L 3-Valve modular engines found in trucks and Mustangs of that era. Confirm your engine is the 3-Valve variant before ordering.
Yes. Because the lockout fixes cam timing at one position instead of letting the engine vary it, the engine calibration has to be updated to match. Plan on a tune adjustment as part of the install so the engine runs correctly with the new fixed timing.
It's common. Since the front of the engine is already disassembled, many builders replace the timing chain, guides, and tensioners at the same time. If you're also upgrading the camshafts, pairing the lockout with matched valve springs keeps the valvetrain working together.
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