A3 Mk2
| High-pressure pump - exploded view (for engine code letters AXW and BHD) |
| 1 - | Roller tappet |
| q | Can possibly stick inside cylinder head after removal of high-pressure pump |
| 2 - | O-ring |
| q | Renew |
| q | Before installing, lubricate lightly with clean engine oil |
| 3 - | Mechanical single-plunger high-pressure pump with fuel pressure regulating valve -N276- |
| 4 - | Bolts |
| q | 10 Nm |
| 5 - | Banjo bolt with tapered sealing seat |
| q | Connection for fuel return pipe to fuel tank |
| q | Counterhold connection on high-pressure pump when loosening |
| q | Renew banjo bolt |
| q | 17 Nm |
| q | Install fuel pipe so it is free of tension (all parts must be clean) |
| 6 - | Banjo bolt with tapered sealing seat |
| q | Connection for high-pressure fuel pipe leading to fuel rail |
| q | Counterhold connection on high-pressure pump when loosening |
| q | Renew banjo bolt |
| q | 25 Nm |
| q | Install fuel pipe so it is free of tension (all parts must be clean) |
| 7 - | High-pressure fuel pipe |
| q | Fuel pressure in high-pressure pipe can be up to 120 bar! Wear safety goggles and protective clothing to avoid possible injury and skin contact. Wrap a cloth around the connection before loosening the fuel pipes. Then dissipate pressure by carefully slackening banjo bolts |
| 8 - | Fuel pipes |
