Spark Plug Replacement - Suzuki XL7 2007 Service Manual

Spark Plug Replacement

Removal Procedure
1. Remove the ignition coil(s). Refer to "Ignition Coil
Replacement - Bank 1" and/or "Ignition Coil
Replacement - Bank 2".
WARNING
!
Refer to "Safety Glasses and Compressed
Air Caution: ".
CAUTION
!
Clean the spark plug recess area before
removing the spark plug. Failure to do so
could result in engine damage because of
dirt or foreign material entering the cylinder
head, or by the contamination of the cylinder
head threads. The contaminated threads may
prevent the proper seating of the new plug.
Use a thread chaser to clean the threads of
any contamination.
2. Use compressed air in order to remove debris from
the spark plug cavity.
CAUTION
!
Allow the engine to cool before removing the
spark plugs. Attempting to remove the spark
plugs from a hot engine may cause the plug
threads to seize, causing damage to cylinder
head threads.
3. Remove the spark plug.
Installation Procedure
CAUTION
!
Use only the spark plugs specified for use in
the vehicle. Do not install spark plugs that
are either hotter or colder than those
specified for the vehicle. Installing spark
plugs of another type can severely damage
the engine.
CAUTION
!
Check the gap of all new and reconditioned
spark plugs before installation. The pre-set
gaps may have changed during handling.
Use a round feeler gage to ensure an
accurate check. Installing the spark plugs
with the wrong gap can cause poor engine
performance and may even damage the
engine.
1. Ensure that the spark plug gap is equivalent to the
spark plug gap specification. Refer to "Ignition
System Specifications".
CAUTION
!
Be sure that the spark plug threads smoothly
into the cylinder head and the spark plug is
fully seated. Use a thread chaser, if
necessary, to clean threads in the cylinder
head. Cross-threading or failing to fully seat
the spark plug can cause overheating of the
plug, exhaust blow-by, or thread damage.
CAUTION
!
Refer to "Fastener Notice: ".
Ignition System: 1H-5