Withdrawal
Attention! Unscrew the spark plugs only when the engine is cold or its temperature must be such that you can hold your hand on it. When removing spark plugs from a hot engine, the threads in the spark plug sockets that are mounted on the cylinder head made of light metal can be damaged.
1. Turn off the ignition.
2. Remove the motor protective cover.
Vehicles with V6 engine
3. Right cylinder head. Remove the air filter cover.
4. Left cylinder head. Unscrew the coolant expansion tank from the bracket and, without disconnecting the hoses, move it away from the place of work.
5. Remove clamp 1, unscrew bolt 2 (see illustrations 17.5, 17.5a).
17.5. Remove a collar 1, unscrew a bolt 2. The right head of the block of cylinders | 17.5a. Remove a collar 1, unscrew a bolt 2. The left head of the block of cylinders |
6. Disconnect plugs from spark plugs.
7. Remove ignition coils.
8. Unscrew the spark plugs using a spark plug wrench.
Vehicles with V8 engine
9. Disconnect the plugs 1 from the ignition coils (see illustrations 17.9 and 17.9a).
17.9. Disconnect plugs 1 from ignition coils. Left cylinder head | 17.9a. Disconnect plugs 1 from ignition coils. Right cylinder head |
10. Unscrew bolts 2 and remove the bracket (see illustrations 17.9 and 17.9a).
11. Unscrew the bolts 3 fastening the ignition coils (see illustrations 17.9 and 17.9a) and remove coils.
12. Unscrew the spark plugs with a spark plug wrench.
The spark plugs are installed in the reverse order of removal.
Examination
13. Examine the candles. If the spark plug is oily, then there is a misfire or it is caused by the poor condition of the piston rings of the corresponding cylinder (check the compression by contacting the workshop).
14. Check the gap between the electrodes using a template, e.g. HAZET 2147 MS (see illustration).
The gap between the electrodes of the spark plugs is 1.0±0.1 mm.
Attention! The gap between the electrodes on new spark plugs is usually set correctly at the factory. It can only be checked, not corrected. If the gap between the electrodes exceeds the nominal value, then the candle should be replaced with a new one.
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