Caution: If the heating system has just been turned on or the engine has just been running, the spark plugs may be very hot.
- disconnect the negative battery cable;
- on a 1.9L engine, remove the engine cover by pulling out the fasteners on the right and top sides;
- on a 2.0L engine, remove the engine cover by turning the tabs 90°;
- unscrew the nut of the power terminal of the corresponding spark plug;
- remove the spark plug power wire from the terminal and unscrew the spark plug from the cylinder head.
Check the glow plugs in the following order:
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1) inspect each spark plug and make sure there is no mechanical damage;
2) If the spark plugs are in good condition, check for internal breakage using a lamp or ohmmeter;
3) Apply 12V to the spark plug and make sure that the spark plug heats up evenly and for the specified period of time, while fulfilling the following requirements:
- clamp the spark plug in a vice as the spark plug will become red hot;
- the spark plug must be supplied with power through a fuse to avoid trouble in the event of a short circuit;
- after checking, let the candle cool for a few minutes;
- a working spark plug should quickly glow red hot; if the spark plug takes too long to heat up or if it is not the tip that heats up, but the central part of the spark plug, this indicates that it is faulty.
Install glow plugs in the following order:
- apply a small amount of copper based anti-seize compound to the spark plug threads;
- screw the spark plug into the cylinder head and tighten to the specified torque;
- connect the power wire to the spark plug and secure it with a nut and washer;
- install the engine cover.