Catalogue 2012/2013 - Denso-am.eu

Spark Plugs
Installation
GB
Spark plug installation
Recommended Torque and Tightening Angle for
DENSO plugs.
A
B
1. Use the correct wrench for the hex on the plug, and be careful not
to damage the insulator.
2. When changing, make sure that the oil, etc. on the outside of the
plug does not enter the engine interior.
3. When putting the plugs in, clean the engine side of the flange and
put in the plugs after making sure the gasket is in the flange.
C
D
4. Make sure the plugs are vertical and tighten them by hand until
they cannot be tightened any further (A+B).
5. Then, use a plug wrench to tighten them accurately to the torque
or rotation angle showed in the chart below (C+D).
RECOMMENDED INSTALLATION TORQUE SPECIFICATION
Gasket
Taper seat
Thread size
Recommended
Torque
Recommended
Turns
New
plug
M8 Y type 8-10 Nм ± 1 turn
M10 U, N type 10-15 Nм
M10
M12
M14
M14
M18
Stainless
steel gasket
SXU, X, XE,
XU, ZXE, ZXU
type
FK, J, K, KJ, P,
PK, PKJ, PQ,
Q, QJ, QL, S,
SF, SK, SKJ,
SV, SVK, VK,
VKJ, W, ZT
type
Stainless
steel gasket
L, M, MA, MW
type
10-15 Nм
15-20 Nм
20-25 Nм
20-25 Nм
30-40 Nм
M14 PT, PTJ, T type 20-30 Nм
M18 MA type 30-40 Nм
± 2/3
turn
± 3/4
turn
± 1/3
turn
± 1/2
turn
± 2/3
turn
± 1/4
turn
± 1/16
turn
± 1/4
turn
Used
plug
± 1/12
turn
± 1/12
turn
± 1/12
turn
± 1/12
turn
± 1/12
turn
± 1/12
turn
± 1/12
turn
± 1/16
turn
± 1/12
turn
If a thread lubricant such as grease is coated on
the thread, tightening to the recommended torque
is tightening too much; this has been linked to seal
leakage. Do not use a thread lubricant.
Tightening more than the tightening angles and
torques shown in the above table could result in
damage to the engine and furthermore could result
in the plug coming off at the thread.
5