Service Battery And Battery Cables; Generator And Regulator; Fan Belt; Check Intake Manifold Bolts - Pontiac Grand Prix Service Manual

TUNE-UP 6C -3
Use only a few strokes of a clean, finecut contact
file. The file should not be used on other metals and
should not be allowed to become greasy or dirty.
Never use emery cloth or sandpaper to clean contact
points since particles will embed and cause arcing
and rapid burning of points. Do not attempt to remove
all roughness nor dress the point surfaces down
smooth. Merely remove scale or dirt.
a
Replace points that are burned or badly pitted.
Where burned or badly pitted points are encountered,
the ignition system and engine should be checked to
determine the cause of trouble so it can be eliminated.
Unless the condition causing point burning or pitting
is corrected, new points will provide no better service
than the old. See section 6E for condenser check.
a
On 6 cyl. engines, adjust distributor point gap to
.019" (new points) or .016" (used points), using a flat
feeler gauge. Breaker arm rubbing block must be on
high point of lobe during adjustment.
NOTE: Used contact points should be cleaned before
adjusting with feeler gauge.
9. Lubricate distributor breaker cam sparingly with
distributor cam lubricant.
10. Install rotor and distributor cap. Press all wires
f m l y into cap towers.
SERVICE BATTERY AND BATTERY CABLES
State of Charge Test
1. Measure the specific gravity of the electrolyte in
each cell. If it is below 1.230 (corrected to 80"F.),
recharge with a slow rate charger, and recheck battery.
2. Connect a voltmeter across the battery terminals
and measure the terminal voltage of the battery during
cranking (remove the coil secondary lead during this
check to prevent engine from firing). If the terminal
voltage is less than 9.0 volts at room temperature,
approximately 80"F.), the battery should be further
checked. See section 12 for battery checking procedure
using the "42 1" Tester.
Inspect for signs of corrosion on battery, cables and
surrounding area, loose or broken carriers, cracked or
bulged cases, dirt and acid, electrolyte leakage and low
electrolyte level. Fill cells to proper level with distilled
water or water passed through a dernineralizer.
The top of the battery should be clean and the battery
hold-down bolts properly tightened. Particular care
should be taken to see that the top of the battery is
kept clean of acid film and dirt because of the high
voltage between the battery terminals. For best results
when cleaning batteries, wash fust with a dilute
ammonia or soda solution to neutralize any acid
present and then flush off with clean water. Care must
be taken to keep vent plugs tight
so
that the
neutralizing solution does not enter the cell. The
hold-down clamp should be kept tight enough to
prevent the battery from shaking around in its holder,
but it should not be tightened to the point where the
battery case will be placed under a severe strain.
To insure good contact, the battery cables should be
tight on the battery posts. If the battery posts or cable
terminals are corroded, the cables should be cleaned
separ.ately with a soda solution and a wire brush. A
thin coating of petrolatum to the posts and cable
clamps to help retard corrosion.
If the battery has remained undercharged, see Charg-
ing Circuit
-
Preliminary Checks, section 6E.
If the battery has been using too much water, the
voltage regulator setting is too high.
GENERATOR AND REGULATOR
Unsatisfactory results obtained during battery testing
may indicate further tests and adjustments to the
generator and regulator as outlined in' Engine Electri-
cal (Section 6E).
FAN BELT
4
1. Inspect fan belt condition.
2. Check and adjust if necessary for correct tension of
belt, as follows:
a. Using a Burroughs tension gauge, check the fan belt
midway between the water pump pulley and generator
pulley.
b. Adjust generator on i t . mounting bracket to proper
fan belt tension. See section 6A.
Check manifold heat control valve (six-cyl. 4 Bbl.
engine only) for freedom of operation. If shaft is
sticking, free it up with heat valve lubricant Pt. No.
1050422 or equivalent.
CHECK INTAKE MANIFOLD BOLTS
To check for a possible leak at the intake manifold,
apply some heavy oil around the suspected area.
Tighten all bolts to specification and sequence as
outlined
in
section 6. If gasket is bad, replace.
AIR CLEANER ELEMENT
Wash polyurethane element (heavy duty) in solvent
and re-oil with SAE 30 engine oil. Paper element
should be replaced if clogged. Do not attempt to clean
with an
air
hose.
NOTE: Air cleaner should be seiviced after each
occmion of driving un&r severe dust conditions.