1985 Volvo 740 GL, GLE, Turbo
Crankcase ventilation
The engines equipped with positive crankcase ventilation which prevents crankcase gases from being
released into the atmosphere. Instead, the crankcase gases are admitted to the intake manifold and
cylinders.
PCV system, 740 GLE (B230F engine)
The PCV nipple in the intake manifold should be cleaned every 60,000 miles (100,000 km).
It is recommended that the flame guard be cleaned every 15,000 miles (25,000 km).
PCV system, 740 Turbo (B230F-Turbo engine)
The PCV nipple in the intake manifold and the filter at the end of the PCV hose in the air cleaner should
be removed and cleaned after 60,000 miles (100,000 km).
Check/replace hoses at the same time.
pg. 98 Servicing
WARNING!
The ignition system operates at very high voltages. Special safety precautions must be followed to
prevent injury. Always turn the ignition off when:
●
Connecting engine test and diagnostic equipment to the vehicle (timing light, tach-dwell tester,
ignition oscilloscope, etc).
●
Replacing ignition components e.g. plugs, coil. distributor, HT leads etc.
●
Do not touch any part of the ignition system while the engine is running. This may result in
unintended movements and body injury.
Replacing spark plugs
file:///K|/ownersdocs/1985/1985_740_GL_GLE_Turbo/85740_07.htm (14 of 22)12/30/2006 7:46:11 AM
