Required details:
- Four spark plugs.
- Engines 1.25 / 1.4 l: lubrication.
Caution: Replace spark plugs only when the engine is cold or slightly warm. If the spark plugs are removed while the engine is hot, the threads can damage the light metal cylinder head.
Removing
Engine 1.25 / 1.4 l: Unscrew the oil filler cap, unscrew the nuts and remove the engine cover. Screw the cover back.
To facilitate installation, mark the high voltage wires according to the cylinder numbers from 1 to 4.
Remove all plugs from the spark plugs by pulling on the plugs, not on the high voltage wires. There are special tools for removing the plugs.
If possible, blow the niches for spark plugs with compressed air so that dirt does not get into their holes after removing the spark plugs.
Unscrew the spark plugs with a spark plug wrench. Do not twist the key so as not to damage the ceramic insulator of the candle.
If the candles are oily, then this indicates wear on the piston rings (check compression).
Check the spark plug insulators for traces of leakage current, which appear as thin irregular lines on the surface of the insulator. Replace defective spark plugs if necessary.
Installation
Check the distance between the spark plug electrodes (2) flat probe. For new spark plugs, this distance is usually already set. The gap value is indicated in the table in chap. «Ignition system».
To adjust the gap, bend the side electrode «masses» (1). There is a simple device for this (3), and if it is not there, then you can knock on the electrode «masses». When bending, rest a small screwdriver against the edge of the thread of the candle, but in no case against the central electrode (4), because it can be damaged.
Engine 1.25 / 1.4 l: before installing the candles, lubricate their threads with grease.
Screw the spark plugs into the cylinder head as far as they will go without twisting the spark plugs.
Tighten spark plugs to 15 Nm (1.3 l engine: 20 Nm).
Attention! If there is no torque wrench, then tighten the new spark plugs with a spark plug wrench by about 90°. Not new candles hold out by about 15°. Spark plugs that are too tight can damage the threads in the cylinder head when loosened. In this case, the thread can be repaired using special techniques.
Put the plugs on the spark plugs in accordance with the marks made during removal.
Engines 1.25 / 1.4 l: unscrew the oil filler cap and install the casing (cover) engine, tightening the nuts of its fastening with a torque of 6 Nm. Install the cover back.
Checking electrical connections
Check all electrical connections at ignition coils for tightness. Replace damaged contacts.
Contacts should not be wet, otherwise clean them and apply a protective compound.
Bend the high voltage wires and check them for cracks. Replace all wires if necessary.