Removal and installation
Z19DT engines (H)
2. Disconnect the wire from the negative battery terminal (see chapter 5) and remove the engine cover (see chapter 2). On the Z19DT engine, additionally disconnect the vacuum lines from the top of the engine.
3. Disconnect the connectors (see resist. illustration) glow plug wiring harness and remove the spark plugs.
7.3 Candles (2) incandescent (Z19DTH engine): 1. Wiring connectors
4. Installation is carried out in the reverse order.
Features of Y20DTH/ Y22DTR engines
5. Loosen the mounting clamps, unscrew the 2 bolts and remove the upper section of the intake air path, set it aside.
6. Glow plug wiring connectors are separated using a special tool (see resist. illustration).
7.6 Special tool KM-717 (1) for separating connectors (2) glow plug wiring (motors Y20DTH/Y22DTR)
Checking candles
7. After removal, it is necessary first of all to check the candles for mechanical damage - if necessary, replace.
8. Checking the performance of a glow plug can be done by applying a voltage of 12 V to it, - a serviceable candle should heat up in a timely manner (be careful not to burn yourself):
- a) The power supply must be equipped with a fuse for short circuit protection;
- b) Clamp the candle in a vise with soft sponges - do not forget that its working element is red-hot;
- c) After checking, let the candle cool for a few minutes so as not to burn yourself.
9. The working element of a serviceable candle should be red-hot no later than after 5 seconds. If it takes noticeably longer to warm up the candle, or if the tip only glows in the middle, the candle must be replaced.
10. For a more thorough check of candles, special equipment is used, which is available at almost any service station.
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