BA DT08 SL EN – Edition 1.0 * dt08b510.fm
5-7
Maintenance
Spark plug (petrol engine)
Danger!
The engine is very hot after it has been in service.
Danger of burns!
☞
Allow the engine to cool down
Caution!
If the spark plug is not tightened correctly, it can become very hot and cause
engine damage.
☞
Always tighten the spark plug firmly
☞
Never use a spark plug with the wrong heat range
The spark plug must be set correctly and be free of deposits to ensure that the engine runs
correctly.
Remove spark plug
B
as follows:
☞
Stop the engine
☞
Remove spark plug connector
A
☞
Remove spark plug
B
with a suitable spark plug key
☞
Check spark plug
B
as follows:
☞
Check the outside of spark plug
B
➥
Dispose of spark plug
B
if it is worn, or if the insulator is torn or cracked.
☞
Measure the electrode gap with a suitable tool
➥
The gap must be between 0.70 and 0.80 mm
☞
Check the sealing ring for wear
☞
Clean spark plug
B
with a suitable tool (e.g. wire brush etc.) if it can be used again
Mount spark plug
B
as follows:
☞
Screw in spark plug
B
by hand to avoid damage to the thread
☞
Tighten spark plug
B
with a suitable spark plug key.
☞
Tighten a new spark plug
B
by ½ a revolution after it makes contact, in order to com-
press the sealing ring
☞
Tighten a spark plug
B
that is already used by 1/8 – 1/4 of a revolution after it makes
contact, in order to compress the sealing ring
☞
Fit spark plug connector
A
back on again
The following spark plugs have been released:
Fig. 74: Spark plug
A
0.70 mm –
0.80 mm
B
Manufacturer’s description
Manufacturer
• BPR6ES
NGK
• W20EPR-U
DENSO
