Damage can vary from limited adjustability to complete loss of tension, which can be catastrophic to a running engine. Depending on the type and location of the break, some tensioner malfunctions can be more problematic than others. Often caused by a loose chain, a broken timing tensioner can cause many problems. A loose chain can also rattle and move around, creating unintended momentum and leading to broken parts. A loose chain can slip, causing a complete change in the alignment of the camshaft and crankshaft, leading to massive damage. While simple, this issue can cause big problems. Common Triton Timing Chain Issues Universal IssuesĪ loose timing chain is the most common timing issue on any chain-driven engine. While this technology is helpful, it introduces a whole new list of parts that can break. As driving conditions change to low-RPM cruising, the solenoid will open to delay valve timing, which is optimal for fuel economy. The default on a VCT system is optimal for high-power scenarios, where maximum torque and horsepower are needed. The higher the oil pressure, the more delayed the valve openings will be. When the solenoid opens and lets oil pressure climb, the phaser rotates the camshaft to a new position while the timing belt remains constant. A phaser works as an adjustable gear and is controlled by the oil pressure around it. VCT works by using a phaser where the timing chain connects to the camshaft and a VCT solenoid to change the oil pressure on this phaser. The 3-valve Triton does this by changing the timing of the camshaft, which we'll call VCT (Variable Cam Timing). While VVT can get complicated, it follows one main goal: changing the valve movement timing to optimize engine performance. While the 2-valve engine used the simple chain-only system explained above, the 3-valve version brought along Variable Valve Timing, or VVT. There were two main variants of the 5.4 Triton, a 2-valve manufactured from 1997-2004 and a 3-valve used from 2004-2017. If the timing is off, the moving parts at the heart of the engine will no longer be working together. This is why timing is so crucial to the success of a running engine. When the valves are retracted, the piston is driven up, and combustion occurs, and as the piston goes down, the valves open. However, as it turns to the flat bottom side, the valve has space to be pushed back out of the cylinder by an attached spring. When the long pointy end of the "egg" touches the valve rod, it is pushed into the cylinder allowing air and fuel in, or exhaust gas out. The camshaft is a rod with egg-shaped disks that move the valves up and down as it turns. The crankshaft turns with the engine and is relative to the pistons' rate of moving up and down. It connects the crankshaft to the camshaft, which drives the valves up and down. How Do They Work?Ī basic timing chain is relatively simple in design. These work simultaneously to control the valves in harmonic motion, making the engine run smoothly. The 5.4 Triton is a V8 engine with 2 separated cylinder banks, so it has 2 timing chains. A timing belt is a cheaper but similar way to control valve timing from the engine's exterior. Timing chains are located inside the engine block, as opposed to a timing belt. These allow fuel and air to go into the cylinders, and exhaust gasses to go out. The timing chain is responsible for controlling the valves of the engine. What Is a Timing Chain and How Does It Work? What Does a Timing Chain Do? What Is a Timing Chain and How Does It Work?. However, many Triton owners have experienced timing issues that, if overlooked, can cause expensive damage. Like any other engine, it relies on timing to run properly and efficiently. The 5.4 Triton is a modular V8 engine manufactured by Ford from 1997 to 2017.
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