Chevrolet 1963 Corvette, Руководство по ремонту и настройке

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294 TROUBLESHOOTING
Test and Procedure
Results and Indications
Proceed
to
12.3—Inspect the oil pressure relief
valve and spring, to ensure that it
is not sticking or stuck. Remove
and thoroughly clean the valve,
spring, and the valve body.
If the oil pressure improves:
If no improvement is noted: 12.4
12.4—Check to ensure that the oil pump
is not cavitating (sucking air in-
stead of oil): See that the crankcase
is neither over nor underfull, and
that the pickup in the sump is in
the proper position and free from
sludge.
Fill or drain the crankcase to the proper ca-
pacity, and clean the pickup screen in solvent
if necessary. If no improvement is noted:
12.5
12.5—Inspect the oil pump drive and the
oil pump:
If the pump drive or the oil pump appear to
be defective, service as necessary and retest
per 12.1:
12.1
If the pump drive and pump appear to be
operating normally, the engine should be See
disassembled to determine where blockage Chapter
exists: 3
12.6—Purge the engine of ethylene gly-
col coolant: Completely drain the
crankcase and the oil filter. Obtain
a commercial butyl cellosolve base
solvent, designated for this pur-
pose, and follow the instructions
precisely. Following this, install a
new oil filter and refill the crank-
case with the proper weight oil.
The next oil and filter change
should follow shortly thereafter
(1000 miles).
TROUBLESHOOTING EMISSION CONTROL SYSTEMS
See Chapter 4 for procedures applicable to
individual emission control systems used on specific combinations of engine/transmission/
model.
TROUBLESHOOTING THE CARBURETOR
See Chapter 4 for service procedures
Carburetor problems cannot be effectively isolated unless all other engine systems (particularly
ignition and emission) are functioning properly and the engine is properly tuned.