SEAT Workshop Service and Repair Manuals > Leon Mk1 > Power unit | 4-cyl. diesel engine | Ignition system, glow plug system | Checking glow plug system

Checking glow plugs

Special tools and workshop equipment required

t	Diode test lamp -V.A.G 1527-

t	Adapter set -V.A.G 1594-

t	Pre-heater glow plug spanner -U-40082-

t	Dynamometric spanner -SAT 8010 (5...50 Nm)-

Test prerequisites

l	Battery voltage at least 11.5 V

l	Ignition switched off

Test sequence

–	Pull glow plug connector off glow plug.

–	Connect diode test lamp wire using auxiliary clips from auxiliary cable set to battery positive (+).

–	Place diode test lamp probe on each glow plug one after the other. Diode lights up: glow plug OK. Diode does not light up: replace glow plug.

–	Remove and install the pre-heater glow plugs with the tool -U-40082-.

Tightening torque: 15 Nm

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