Installation details for glow plugs on diesel engines (on the example of a 4-cylinder engine)
1. Warm up the engine to normal operating temperature (80°С).
Attention! Spark plugs should only be removed after the engine is fully warmed up!
2. Remove air distributor trim panels (2) and cylinder head covers (1).
3. On 628 series engines, remove the air cleaner (see chapter Power supply and exhaust systems).
4. On 612 series engines, disconnect the return line from the fuel line to the injection pump.
5. Disconnect the electrical wiring from the glow plug to be removed (3).
6. Remove spark plug (R9).
7. Using a special cylindrical brush of suitable diameter, clean the candle niche.
8. Installation is carried out in the reverse order.