Pontiac FIREBIRD 1972 Service Manual page 527

SIX CYLINDER ENGINE 6- 15
be identified by the polished surface which contacts the
rocker arm. Push rods will also be polished somewhat in
the area where the rod passes through the head.
When hydraulic valve lifters are disassembled, the various
parts of each lifter must be kept together. This is especially
important since the lifter body and plunger are selectively
fitted. The use of the special tray included with cleaning
tank 5-5821 will aid in keeping the parts of each lifter
together when lifters are being serviced.
When raising or supporting the engine for any reason, do
not use a jack under the oil pan or crankshaft pulley. Due
to the small clearance between the oil pan and the oil
pump screen, jacking against the oil pan may cause it to
be bent against the pump screen resulting in a damaged oil
pick-up unit.
It should be kept in mind, while working on the engine,
that the 12-volt electrical system is capable of violent and
damaging short circuits. When performing any work
where electrical terminals could possibly be grounded, the
ground cable of the battery should be disconnected at the
battery.
Any time the carburetor or air cleaner is removed, the
intake opening should be covered. This will protect
against accidental entrance of foreign material which
Fig. 6-15 Valve Train Holding Stand
could follow the intake passage into the cylinder and cause
extensive damage when the engine is started.
In the mechanical procedures described in this section,
generally no references will be made to the removal of
optional equipment such as power steering pump, air con-
ditioning compressor, etc.
Should it become necessary to remove any such item to
perform other service, refer to the appropriate section of
this Service Manual for specific information.
PERIODIC SERVICE
There are no periodic services required on the mechanical
filter, fuel filter, etc. Procedures and recommendations for
portions of the engine. Periodic services connected with these services will be found in appropriate sections of this
the engine consist of tune-up, lubrication, replacing oil manual.
SERVICE OPERATIONS ON CAR
ENGINE INSULATORS
4. Remove front insulator by unscrewing frame bracket
to insulator bolt and lifting insulator from bolt.
FRONT INSULATORS
5. Install new insulator.
REMOVE AND REPLACE
6 . Lower front of engine into position and install insula-
tor to engine bracket bolts. Tighten nuts to 45 lb. ft.
1. Support engine with J 23515-3 adaptor and engine
lifting support tool, wrapping chains around frame
(Fig. 6- 19). (On X Series models, it may be necessary
to add washers between adapter and harmonic ba-
REAR INSULATOR
lancer to provide initial clearance between adapter
and frame). REMOVE AND REPLACE
2. Remove insulator to engine bracket through bolts.
1. Remove crossmember to rear insulator bolts.
3. Raise engine approximately 1" above front insula-
2. Raise rear of engine and transmission with suitable
tors. lifting equipment.