Beretta L4-138 2.3L DOHC QUAD 4 (1991)
KITS.
The following inspections may be performed to verify that there is a concern with the head gasket.
NOTICE:
ONE OR MORE OF THE FOLLOWING FOUR (4) CONDITIONS LISTED BELOW MAY INDICATE A FAILED HEAD GASKET.
1.
Confirm that there is coolant (loss) with no external leaks.
2.
Check for bubbling in the coolant recovery or surge tank.
3.
White smoke from exhaust system when vehicle is at normal operating temperature.
4.
Remove spark plugs from a cool engine, refer to SECTION 6D4.
-
Inspect cylinder by looking through the spark plug hole. Water or coolant in the cylinder or a washed (clean) piston may mean there is a
concern with the head gasket.
-
Remove ECM fuse and crank engine with spark plugs removed. Water or coolant vapor coming out of the spark plug hole may mean there is a
concern with the head gasket.
-
Inspect spark plugs. Green contamination may indicate an internal coolant leak.
5.
If steps 1 through 4 give no indication of a head gasket concern, fill the coolant recovery or surge tank. Mark and date the tank at the coolant level.
Return vehicle to the owner. Ask the customer not to add any coolant to the system and monitor the coolant level. Have the customer return the
vehicle to the dealership if the coolant level is low.
IMPORTANT:
Condensation in the oil does not necessarily indicate a head gasket concern if there is no coolant loss. Some condensation in the oil may be
considered normal.
PARTS INFORMATION:
Parts are to be obtained from General Motors Service Parts Operations (GMSPO). To ensure these parts will be obtained as soon as possible, they should
be ordered from GMSPO on a "C.I.0." order with no special instruction code, but on an advise code (2).
NOTICE:
The cylinder head gasket kit (P/N 12354854) contains a check valve which will not be used for this policy action.
VIDEO TRAINING TAPE:
Each dealership will be sent one video tape on the subject of Quad 4 head gasket repair at no charge. The video will be mailed by early September, 1993.
SERVICE PROCEDURE:
NOTICE:
The following procedure supplements the existing service manual procedure. The tightening sequence replaces all existing 1990-91 service manual head
tightening procedures for Quad 4 engines.
Tool Required:
J-36660
Torque Angle Meter
1.
Completely drain cooling system and dispose of coolant. DO NOT recycle coolant from this engine.
NOTICE:
Cylinder block, head, radiator and heater core must be completely drained of coolant since old coolant will be contaminated with combustion
residue. Refer to appropriate service manual section for coolant draining procedure.
2.
Remove cylinder head. Refer to appropriate service manual for details of Removal Procedure.
