Tredia L4-1795cc 1.8L SOHC Turbo (1984)
Oil Pump: All Technical Service Bulletins
Engine - New Oil Pump May Reduce Noise
NO.:
TSB-92-11-002 REVISION 2
DATE:
November, 1992
MODEL:
See Below
This bulletin supersedes Technical Service Bulletin # TSB-92-11-002 REVISION (Dated June, 1992) and Advance Technical information Notice #
ATIN-92-11-001 (Dated July 31, 1992). Please discard the superseded TSB and ATIN.
New information includes:
-
Deletion of 1983-89 2.0L Truck from Vehicles Affected list.
-
Addition of new drive gear for 1983 Cordia/Tredia (1.8L and 2.0L, SOHC), 1985-87 Galant (2.4L, SOHC), 1987-90 Van/Wagon (2.4L, SOHC),
and 1990-92 Truck (2.4L, SOHC).
PURPOSE
This Technical Service Bulletin describes a new oil pump/gear assembly that may reduce engine noise on some 1.6, 1.8, 2.0, and 2.4 liter 4G6-Series
engines.
VEHICLES AFFECTED
1983-88
Cordia/Tredia (1.8L and 2.0L, SOHC)
1987-90
Van/Wagon (2.4L, SOHC)
1985-87
Galant (2.4L, SOHC)
1989-92
Galant (All)
1989-92
Mirage (1.6L, DOHC)
1990-92
Eclipse (2.0L, DOHC)
1990-92
Truck (2.4L, SOHC)
1992
Expo 2.4L, SOHC)
DESCRIPTION
On some vehicles equipped with the 4G6-Series engine, you may receive customer complaints of a high-pitched whining noise coming from the engine.
This noise most likely originates from the engine's oil pump and is particularly noticeable during cold starting.
To help reduce the noise, a new oil pump is available. The new pump has helical gears as opposed to the former pump's spur gears. In addition,
modifications were made to the engine front case to accommodate the redesigned gears.
