Chevrolet Corvette 1963 Repair & Tune-Up Manual page 323

Test and Procedure
11.5—Check the radiator pressure cap:
Attach a radiator pressure tester to
the radiator cap (wet the seal prior
to installation). Quickly pump up
the pressure, noting the point at
which the cap releases.
Checking radiator pressure cap
11.6—Test the thermostat: Start the
engine cold, remove the radiator
cap, and insert a thermometer into
the radiator. Allow the engine to
idle. After a short while, there will
be a sudden, rapid increase in
coolant temperature. The temper-
ature at which this sharp rise stops
is the thermostat opening temper-
ature.
11.7—Check the water pump: Remove
the thermostat elbow and the
thermostat, disconnect the coil
high tension lead (to prevent start-
ing), and crank the engine mo-
mentarily.
\Test and Procedure
12.1—Check the oil pressure gauge or
warning light: If the gauge shows
low pressure, or the light is on for
no obvious reason, remove the oil
pressure sender. Install an accu-
rate oil pressure gauge and run the
engine momentarily.
12.2—Visually inspect the oil: If the oil is
watery or very thin, milky, or
foamy, replace the oil and oil filter.
Results and Indications
If the cap releases within ± 1 psi of the speci-
fied rating, it is operating properly:
If the cap releases at more than ± 1 psi of the
specified rating, it should be replaced:
If the thermostat opens at or about the speci-
fied temperature:
If the temperature doesn't increase: (If the
temperature increases slowly and gradually,
replace the thermostat.)
If coolant flows, replace the thermostat and
retest per 11.6:
If coolant doesn't flow, reverse flush the cool-
ing system to alleviate any blockage that
might exist. If system is not blocked, and
coolant will not flow, replace the water
pump.
Section 12—Lubrication
See Chapter 3 for service procedures
Results and Indications
If oil pressure builds normally, run engine for
a few moments to determine that it is func-
tioning normally, and replace the sender.
If the pressure remains low:
If the pressure surges: If
the oil pressure is zero:
If the oil is normal:
If after replacing oil the pressure remains
low:
If after replacing oil the pressure becomes
normal:
TROUBLESHOOTING 293
Proceed!
to ,
11.6 11.6
11.7
11.7
11.6
Proceed
to
12.2 12.3
12.3
12.3
12.3
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