Cutlass Ciera FWD V6-260 4.3L DSL (1982)
Cylinder Head Gasket: All Technical Service Bulletins
Cylinder Head Gasket - Failure
SUBJECT
CYLINDER HEAD GASKET FAILURE
NUMBER: 82-T-28
DATE:
August 6,1984
MODELS/YEARS
1982 CUTLASS CIERA WITH
SECTION: 6A
V-6 LT7 DIESEL ENGINE
1982 model V-6 diesel Cutlass Cieras were built with a slightly different cooling system than 1983 and 1984 models. The later models have a coolant
bypass system. This system changes coolant flow through the engine during closed thermostat operation and reduces thermostat cycling. Under some
driving and temperature conditions, this may contribute to a head gasket failure. Therefore, if a head gasket failure is encountered, replace both head
gaskets and install the coolant bypass system as outlined. Use the head gaskets listed in the kits below.
Diesel cylinder heads often exhibit hairline cracks between the intake and exhaust valve seats. This is not considered unusual and this condition does not
require replacement of the cylinder heads.
DIAGNOSIS
Failure of a head gasket may result in either or both of these conditions:
1.
Compression gases leaking into the coolant which is evident by bubbles coming out of the coolant overflow hose.
2.
Compression leak between the head and block at the end of the head. This makes a popping or hissing sound.
SERVICE PROCEDURE
1.
Replace the head gaskets as outlined in the service manual. Use Overhaul Gasket Kit No.. 22527056 or Cylinder Head Gasket Kit No. 22527055.
FIGURE 1
2.
Remove the Fan Control Sensor from the intake manifold. Apply a sealer such as part no. 1050026 or equivalent to the threads of fitting, part no.
22519880 and install in the intake manifold as shown as Item 1 in Figure 1. Apply sealer to the Fan Control Sensor threads and install in the
fitting.
3.
Remove the water outlet. Remove the thermostat and install a 82~ C. (180~ F.) thermostat, part no. 3054228.
4.
Remove the heater-to-pump pipe and install pipe no. 22520032, shown as Item 2 in Figure 1.