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Autopapyrus · Volkswagen Sharan 1.4 TSI 150 hp (2011)
https://autopapyrus.com/guides/volkswagen/sharan/high-pressure-fuel-pump-replacement/
Compiled automatically from service literature and owner experience. Specs are for the typical configuration — check them against your exact car before you start.

Volkswagen Sharan 1.4 TSI 150 hp (2011): High-Pressure Fuel Pump Replacement

On the 1.4 TSI, the HPFP is mounted on the cylinder head and driven by a camshaft lobe through a follower. Typical reasons for replacement: hard starting, loss of power, fuel rail pressure fault codes, metal particles, or heavy wear on the lobe and follower. The job requires cleanliness and care, because the system operates under very high pressure.

Difficulty: Hard Time: 2-4 hours Steps: 13 Tools: Socket set and ratchet, torque wrench, Torx and hex (Allen) bit sockets (sizes depend on the fasteners), container and rags for leftover fuel, a canister or hose for relieving pressure, cleaning spray, compressed air, hose clamp pliers if needed

Part

  • 🔩 1.4 TSI high-pressure fuel pump (HPFP) with drive follower (roller or bucket type, depending on the design). Additionally: a set of seals and O-rings and the pump gasket, new mounting bolts (if they are single-use), and a high-pressure fuel line to the rail if needed. I am not giving an exact part number for your engine so as not to get it wrong. Choose the part by VIN, because different pump versions are used on this generation
There's a full repair manual for this car Every system, wiring diagrams and torque specs — not just this job. Haynes AutoFix (online) and 1 more. See manuals →

Step by step

13 steps
  1. Let the engine cool down completely. Disconnect the negative battery terminal. Before that, save the radio codes and make sure you know how to reset the windows and other systems afterward.
  2. Remove the engine cover and any air ducts that block access to the pump. The layout depends on the engine version, so remember or photograph the position of the hoses and connectors.
  3. Relieve the pressure in the fuel system. To do this, shut off the engine and wait a few minutes, then disconnect the low-pressure fuel line, covering the connection with a rag. Fuel will leak out, so have a container ready. Keep sparks and open flames away.
  4. Thoroughly clean the area around the pump and the fittings so that dirt does not get into the system during disassembly.
  5. Disconnect the electrical connector of the metering valve on the pump, and the pressure sensor if it is in the way.
  6. Disconnect the low-pressure supply hose and the high-pressure line between the pump and the rail. Use a suitable wrench and do not apply excessive force. Replace the high-pressure line with a new one if it is damaged or if the cone is deformed.
  7. Loosen and remove the bolts securing the pump to the cylinder head. Hold the pump, because it is pushed against by the follower and spring. Carefully remove the pump without letting it tilt.
  8. Remove the follower (roller or bucket) and inspect it. Also inspect the pump camshaft lobe. Scoring, wear, or deep wear means the follower must be replaced too, and if the lobe is badly worn, the camshaft will need repair. Replacing only the pump without fixing the cause is pointless.
  9. Check the pump O-ring and replace it if necessary, and lubricate the new ring with clean engine oil. Install a new or verified follower.
  10. Install the new pump, making sure it sits snugly and evenly on the head without tilting. Tighten the mounting bolts evenly, in alternating order. Check the tightening torque in the manufacturer's specifications for your engine version. As a rough guide, small pump mounting bolts are around 8-12 N·m (6-9 lb-ft), with an additional angle turn if required.
  11. Connect the high-pressure line and the low-pressure line, and tighten the connections to the recommended torque without overtightening. Reconnect the sensor and valve connectors.
  12. Reconnect the battery and switch the ignition on for a few seconds to prime the low-pressure fuel system, repeating 2-3 times. Then start the engine. The first start may take longer than usual.
  13. Check for leaks with the engine running: look for fuel seepage and any smell of gasoline. Read the fault memory and clear it. Take a test drive and make sure there are no power drops or pressure fault codes.

Common mistakes and warnings

  • A direct injection system operates at pressures of tens to hundreds of bar. Never loosen high-pressure lines on a hot or running engine, and do not work near sources of sparks. Pressurized gasoline on the skin is dangerous. If you have no experience working on fuel systems, leave the job to a repair shop. Any fuel leak in the engine bay creates a fire risk.