The Differences Between EA888 Gen 2 and EA888 Gen 3 Components

REVO is trusted by customers worldwide, with products adhering to OE quality standards and undergoing rigorous testing for high performance and durability.

The Volkswagen EA888 engine has been highly regarded since its inception. This engine has made technological breakthroughs and is praised for its fuel efficiency. However, there has always been controversy surrounding its reliability. There's a Chinese saying in the automotive repair industry: "EA888, whoever repairs it gets rich."

REVO timing chain kit

Debuting in 2007, the engine incorporated technologies such as direct fuel injection, turbocharging, and twin balancer shafts, setting a new trend in engine development. The second-generation EA888, known as EA888 Gen 2, introduced one of its most significant improvements: Variable Valve Timing (VVT), which enhances fuel economy and engine performance. Additionally, it featured a new "Double-C" crankshaft design. Through continuous research and technological innovations, the EA888 has evolved to its fourth generation. The second and third generations of the EA888 engine have been widely used in Audi, Volkswagen, and Skoda cars and SUVs, resulting in a vast number of these vehicles on the road.

The EA888 engine has distinct advantages and equally noticeable drawbacks. Regardless of the brand it is used in, some common issues arise. That's Slippage phenomenon. The EA888 Gen 3 chain has totally improved.

EA888 Gen 2 components vs. EA888 Gen 3 components

Difference 1: Chain

REVO timing chain kit

The EA888 Gen 2 timing chain has a 5x4 structure. The EA888 Gen 3 timing chain has a 4x4 structure, with increased thickness for each chain link. Compared to the EA888 Gen 2 timing chain, the EA888 Gen 3 chain has higher fatigue strength and better wear resistance due to the rearranged chain links.

Relative to the original chain, REVO has made the following improvements:

1. Unique heat treatment and fifth-generation vanadium infiltration technology effectively prevent chain elongation, extending its lifespan.

2. Increased chain thickness for higher fatigue strength and better wear resistance.

3. Smooth stamping technology for precise meshing, effectively reducing noise.

Difference 2: Guide Rails

1. The EA888 Gen 2 guide rail and upper guide rail are shorter, making it prone to slippage.

2. The EA888 Gen 3 guide rail is lengthened, with an added guiding structure when the chain exits the guide rail, preventing chain slack due to elongation and reducing the risk of slippage.

3. The installation holes for the oil pump tensioning guide rail remain unchanged between the second and third generations.

4. The EA888 Gen 3 has slight changes in the profile compared to the EA888 Gen 2, removing internal reinforcements in the guide rail, changing the locking torsion spring pin position, and reducing the torsion spring's force.

REVO timing guide rail design and manufacturing adhere to OE standards with added advantages:

1. Guide rails are made from imported DSM PA46 and DuPont/Asahi Kasei PA66 plastic granules, providing sufficient structural strength to prevent breakage.

2. Added glass fiber for increased product strength and extended lifespan.

3. Extended guide rail ends for smoother chain meshing, reduced operational noise, and prevention of slippage due to chain slack.

Difference 3: Tensioner

REVO timing chain kit

The EA888 Gen 2 tensioner uses a cast aluminum shell with a thread-type check valve for increased strength, improving upon the OE part's small and easily worn smooth surface. The EA888 Gen 3 tensioner uses a cast iron shell with a thread-type check valve, offering better wear resistance and longer lifespan.

REVO's upgraded tensioner:

1. Unique check valve function provides stable tension and proper damping for the timing chain system, preventing slippage.

2. Reinforced shell that resists deformation, with superior structural rigidity, strength, wear resistance, and corrosion resistance.

3. Made from OE-quality materials in a dust-free workshop with constant temperature assembly, ensuring long life.

REVO is trusted by customers worldwide, with products adhering to OE quality standards and undergoing rigorous testing for high performance and durability.

Note: The EA888 Gen 3 has been the longest-used version (with a slightly modified 3.5 version released in 2016) until the fourth-generation EA888 appeared in the new Audi A4 in April 2022. Notably, the new engine includes a 12V BSG mild hybrid system but has not been produced domestically.

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