TGK Motorsport High Pressure Fuel Pump Seal Rebuild Kit - 4.2L(EA113)

Disclaimer Does not fit some AFTERMARKET PUMPS.  These only have been verified on OEM pumps.

Over time, the factory high-pressure fuel pump (HPFP) seals in the Audi 4.2L EA113 engine degrade, leading to fuel leaks, pressure loss, and reduced performance. Additionally, upgrading to larger high-pressure fuel pump pistons can cause the OEM seal to tear, resulting in fuel seepage and oil contamination inside the engine.

The TGK Motorsport HPFP Internal Seal Rebuild Kit is engineered to fix factory leaks, replace torn seals from HPFP upgrades, and restore fuel system integrity. This kit also includes a replacement cam roller tappet, which is prone to wear and scouring when fuel leaks wash away lubrication. Whether you're performing preventative maintenance or upgrading your fuel system, this kit ensures optimal HPFP operation and long-term reliability.

Fix Factory HPFP Seal Leaks & Restore Fuel Pressure

One of the most common failure points in the Audi 4.2L HPFP is seal deterioration, which can lead to fuel seepage, pressure drops, rough cold starts, and engine misfires. Additionally, installing upgraded HPFP pistons—commonly used in high-performance builds—can overstress and tear the factory seal, further reducing fuel pressure and contaminating engine oil. Our rebuild kit addresses both issues, replacing worn or damaged HPFP seals with upgraded components to ensure consistent, high-pressure fuel delivery.

Cam Roller (Tappet) Wear Prevention

Fuel leaks caused by HPFP seal failure can wash away oil from the cam roller tappet, leading to scouring, increased friction, and premature wear. A failing tappet compromises fuel pump efficiency and can even cause mechanical damage over time. Our kit includes a replacement cam roller tappet, ensuring smooth operation and long-lasting performance.

Molybdenum Disulphide Seal for Maximum Reliability

A failing HPFP seal can cause fuel odors, hard starts, loss of power, and potential fuel leaks into the engine bay. Our upgraded Molybdenum Disulphide Seal provides enhanced durability, superior friction resistance, and a perfect seal under high-pressure conditions. Whether you're running a factory setup or an upgraded HPFP piston kit, this seal prevents fuel seepage and pressure loss even under extreme conditions.

Why Choose TGK Motorsport?

✅ Fixes Common Factory HPFP Leaks – Direct replacement for failing OEM seals.
✅ Prevents HPFP Upgrade Seal Tearing – Reinforced seals withstand increased pressure from larger piston kits.
✅ Includes Cam Roller (Tappet) Replacement – Addresses wear and oil dilution caused by fuel leaks.
✅ Restores Fuel Pressure & Reliability – Eliminates pressure loss, fuel seepage, and hard starting issues.
✅ Performance & Maintenance Solution – Ideal for both stock and high-horsepower builds.
✅ Cost-Effective Alternative to Full Pump Replacement – If your HPFP housing and internals are in good condition, this kit saves you time and money.

Seal Failure Symptoms:

🔧 Fuel Smell Inside the Motor
🔧 Cold Starting Issues
🔧 Warm Starting Issues

Included in the Kit:

✔ 2 x Base Seal Kits – These kits feature bottom collars with integrated seals, improving the HPFP’s sealing integrity and preventing fuel leakage.
✔ 2 x Cam Follower Guides – Essential for smooth interaction between the camshaft and HPFP piston, reducing wear and ensuring consistent operation.

Restore Your HPFP’s Performance Today!

Don't let a leaking HPFP seal compromise your fuel system and engine health. Whether you're fixing a factory issue or replacing a torn seal from an HPFP upgrade, the TGK Motorsport HPFP Internal Seal Rebuild Kit ensures leak-free, high-pressure fuel delivery for maximum reliability and performance.

Click the link Here to be taken to the Install Instructions.