912 Каталог FACOM 2013 Профессиональный ручной инструмент и оборудование Стр.886

Каталог FACOM 2013 Инструмент Оборудование Стр. 886 0912 ENG Lab2u

Spark plugs SPARK PLUG WRENCH SELECTION GUIDE AND RECOMMENDED TORQUES FACOM SPARK PLUGS COMPLY WITH THE ISO 11168 STANDARD This standard guarantees Sufficient play to enable the plug to engage in the cylinder head without risk of cross-threading. The spark plug's angle of freedom must also be limited to avoid damaging the insulation. A range for each application. 3/8" socket the most compact sockets. Most comprehensive range 14 mm multi-point spark plug sockets are available only in this range 1/2" sockets most widely-used range but not suited to modern multivalve engines. 1 Hinged wrenches ideal for congested spaces. Use for high productivity. To be used when engine layout prevents the use ofatorque wrench. Box wrenches compact and lightweight particularly suited to tool bags. TORQUE TIGHTENING OF SPARK PLUGS Cylinder heads are made of aluminium alloy. The cylinder heads of modern engines are subjected to increasingly high stresses. Reduction of thread diameters. Therefore spark plugs must always be torqued. The J.208-50 torque wrench is ideal for tightening spark plugs. Flat seating (with seals) Conical seating Thread diameter (mm) 18 14 12 18 14 Cast-iron cylinder head (Nm) 35-45 25-35 15-25 20-30 15-25 Aluminium cylinder head (Nm) 35-40 25-30 15-20 20-30 10-20 Values indicated for information only always refer to manufacturer values. 886 Facom