Chevrolet 1986 Corvair Owner's Manual page 52

cup at the end of the spark plug
wire and the tubular metal con-
nector inside of it. If the spark
plug wire is wet or oily, wipe it
dry. Wrap a dry handkerchief or
facial tissue, folded several thick-
nesss, around the wire at least
three inches back from the end
and grasp wire at this point.
Hold the bare wire about
V4
inch
from the bare tip of the spark
plug from which you removed the
wire. When the engine is "turned
Checking for Spork
over" a spark should jump across the
V4
inch space, indicating
ample current supply. If no spark jumps, the difflcultyis probably
caused by a defective ignition part and should be corrected by
your Authorized Chevrolet Dealer.
COOLING SYSTEM
When the car will run but evidences serious overheating on the
temperature gauge in the instrument panel, there are several items
which may be checkd.
(L) Engine overheating will occur when the OIL LEVEL falls
dangerously low. Check the oil level as a matter of course.
CAUTION: Never drive the car when the TEMP-PRESS indicator in
the instrument panel is lighted.
49
1M) Check the air intake louvers. Clean them if they are plugged
with leaves or other foreign material.
IN) Condition of the FAN BELT
is very important, not only for en-
gine cooling but also for proper
generator operation. Check the
condition of the belt. Replace it
if it is worn or frayed. Loosen the
idler bracket bolts and move
the bracket toward the engine
to remove and replace the belt.
Tighten the belt, whether new or
old, by loosening the idler bracket
nuts, prying with a bar on the
Checking Fan Be" Tension
bracket until the belt is tensioned properly, then retighten the
bracket bolts. Proper belt tension is such that, when belt is de-
flected downward with moderate thumb pressure at a point midway
between the generator and fan pulleys, the belt will deflect about
:Va"
to
K6".
Do not overtighten the belt.
(0) Another cause of engine overheating may be an inoperative
COOLING SYSTEM THERMOSTAT. If the thermostat should fail
in the closed position, it will not permit air to circulate through the
engine. See your Authorized Chevrolet Dealer.