WIS Document: 374

| | Spark plugs | 1. | With Motronic, 2.3/2.0 litre engines | 2. | With Trionic | 3. | With Motronic, V6 | 4. | Wire gauge | Engine | Designation | 2.0 l fuel injection | NGK BCP 5EV (Precious metal) | 2.0 Turbo | NGK BCPR 7ES | 2.3 l fuel injection | NGK BCP 6EV (Precious metal) | V6 fuel injection | Bosch FR 8 LDC (Normal driving) Bosch FR 7 LDC (Hard driving) | Electrode gap Tool 85 80 045 Spark plugs (type 1 in the Fig.) should be checked and adjusted using tool 85 80 045. Spark plugs (types 2 and 3 in the Fig.) should be checked with a wire gauge. | Engine management system | Engine | Electrode gap, mm (in) | Motronic | 2.3/2.0 l | 0.6 ± 0.1 (0.023 ± 0.004) | Trionic | 2.0 l | 1.0 - 1.1 (0.039 - 0.043) | Motronic | V6 | 0.8 ± 0.1 (0.031 ± 0.004) Turning torque, spark plugs 27 Nm (20 lbf ft). | Spark plug replacement, B258 engine Tightening order for intake manifold, B258 | • | Remove the intake manifold. | • | Change the spark plugs. | • | Refit the intake manifold. Tightening torque, intake manifold: 20 Nm (15 lbf ft) Note: Tightening order for intake manifold. | Spark plug replacement recommendations | 1. | Tool 83 94 785 - complete | 2. | Sleeve 83 94 843 | Petrol | Replacement interval km miles | | Unleaded | 60000 36000 | | Leaded petrol | 20000 12000 | | Important | Use tool 83 94 785 to avoid all danger of breaking the spark plugs. |