oil temperature CHEVROLET CORVETTE 1993 4.G Owners Manual

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lnsert the Engine Power Key into the
slot and turn claclnvise to FULL. An
indicat0r"light
will come on when FULL
power performance is operating. To
return to-NORMAL power, turn key
countercloclnvise. The indicator
light
should stop glowing. The key returns to
the center position when released. The
key can be removed when the engine is
in PULL or NORMAL power and only
from the center position.
The
FULL power setting provides
additional
power for highway touring
and off-road sports use as well as
reserve power for passing. Both primary
and secondary fuel intake runners and
injectors can operate when the
FULL
setting is chosen. I
When the ignition is shut off, the engine
reverts
to NORMAL power.
Your ZR-1 is capable of operating at
FULL power when the indicator light is
on and u.nder the following conditions:
The engine coolant and oil
temperatures are greater than 68°F
(200Cc) but less than 3OFF (150°C),
and
-The system voltage is greater than 10
volts, and
There is no SERVICE ENGINE
SOON light indicated on the Driver
Infomation Center. Switching
from the NORMAL to
the
FULL setting and from the FULL to
the NORMAL setting may be done at
engine speeds up to 4,000 rpm.
ZR-1 Toll-Free Number:
If you have any questions or concerns
about your
ZR-1 Special Performance
Coupe, call the following toll-free
telephone number
for ,assistance:
1-800-222-1020
(U.S. only).
75

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Your fuel gage bars light up when the-
ignition ken, -or if the ignition is off,
wken you turn on your.parking lights,
to’ show you about how much fuel you
have left..
When the normal display -is ,down to .the
last
two bars, the message RESERVE
will appear on the left of the-:gag.e.
Here are threethings that some owners
ask about. None of these show a
problem with your bel gage:
At. the gas station, the gas pump shuts
.off be€ore the gage reads F (Full).
It takes a little more or. less fu.el to fill
up than the gage indicated. For
.example., the gage may have. indicated
-t-he tank was half full, but it actually
t0.olr.a 1.ittle more or. less than half the
tanlr’s capacity to ‘fill the tank.
The gage moves a lit& whmyau turn
.a c-arner or spee.d up.
For your fuel tank cap,acity, see Service
Station Information an the last page of-
this manual.
Engine Oil Preesure Gage
Your oil pressure gage shows the oil
pressute .in psi (ptiunds per. s-quare
inch)
or l engine is runnhg. Oil pressure. may
vary with engine -speed, outside
temperature and .oil viscosity. In fact,
while the engine Is warmirig tip, the oil
pressure will be higher than at the
:normal operating ternpaature,
Readings ab.ove-.the shaded area
indicate the.,normal operating range.
If.the gage reads in the shaded area
when you’re idling and stays therej oil
isn’t running thrDugh your engine
properly.

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.Driving. your vehicle with low oil
pressure can cause extensive engine
-damage.
II D4
This gage shows your oil temperature in
degrees Fahrenheit +
It's normal fop the oil temperature to
vary, depending on the type of driving
you do and the weather conditions.. If
"you drive for a long time, such as on a
trip, the gage will show a higher reading-
than
if you had driven for only a short
time. And if it's hot -outside, the-reading
will be higher than if it were cold outside.
If your oil temperature approaches the
shaded area and stays there for some
time; your oil temperature is too high.
Check
the engine oil levei and bring
your vehicle in for service.
You should
also check the engine coolant temperature.
If your engine is to.0 hot, see the.Index
under Engine Cooling System.
For accurate gage measurements refer
to the GAUGES button on the Trip
Monitor (see the
Index under Trip
Monitor).

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LT1 Engine: Engine' Oil temperature
Gage
"LT5 Engiie: Engine Oil Temperature,
Gage
Voltmeter
Your chafging system gage will show
the rate of chafge-.when the engine is
running.
(When the engine is not
running, the- display measures the
voltage-
output of your battery.)
The reading will change sts the rate of
charge changes (with .engine speed,
etc.), but readings between the shaded
are.as indkate the noma1 operating.
range. Readings in either shaded area
indicate-a passible-problem with ydur
charging
system. The CHECK
GAUGES light will come on du-g
both high and.10-w battery voltages. See
your dealer
to have your system
sewiced immediately.
For accurate gage measurements refer
to the. GAUGES button on the Trip
Monitor
(se.e -the In&x under Trip
Monitor).

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Check Gauges Light
This light will come on briefly whien y6u
are starting the engine. I€ the light
comes on and stays on while you are
driving, check your various gages to see
if they are in the warning zones.
If this light comes on and stays on with
the engine running, this indicates one of
the following conditions:
high oil temperature
high coolant temperattiE’
high battery voltage
low battery voltage
IOW oil pressure
or low fuel level (zero bars showing).
I 08
Security Light
The SECURITY light reminds you to
arm your theft deterrent system by
flashing when the ignition is in Lock-
and the doors are opened. It keeps
flashing until
you arm the theft
deterrent system
by locking the doors
using the power door lock button or the
Passive Keyless Entry system.
Once the system
is armed, the light
stops flashing
and remains lit. When the
last
door is shut, the light will stay on
for two seconds and then
go out. It will
also remain lit if the hatch is left open
but the theft deterrent system is still
armed.
If you close the doors and the hatch
without arming the system, the
SECURITY light goes out immediately.
When you re-enter the vehicle, the light
w.ill flash until
you close the door or the
hatch,
or turn the ignition .on. See the
Index under PASS-Key TM and Universal
.Theft Deterrent.

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1 Engine ~e. oni it or
The Engine Oil Life Monitor us&&
engine oil temperature and engine
revolutions
to 'determine when the oil is
nearly worn out.
There ,is a CHANGE OIL light on the
left side ,of the- instrument cluster. It
comes
on for a fkw seconds as a bulb
check when you sta-rtyour vehicle. It
mrnes on and stays on when it is time
to change yuur oil.
The CHANGE OIL light is only a
reminder.
You should change, your oil at
$he intervals recommended in your
Maintersance- Schedule menif the
CHANGE OIL 1-ight hasn't come on.
Resetting the Engine Oil Life
Monitor:
1, %LEU the key to the Run pasition, but
don't
start the engine.
2. Press the ENG MET button .on the
Trip Monitor. Within five seconds,
press the ENG MET button again.
3. Within five seconds of step 2, press
and hold the GAUGES button on
the Trip Monitor. The CHANGE
OIL light d flash.
4..Hold the GAUGES button until the.
CHANGE OIL light stops flashing
and goes out; This should take about
ten seconds. When the light goes out,
the Engine Oil Life Monitor is reset.
If it doesn't reset, tum the- ignition to
Of€ and repeat the procedure.

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TRIP OD0 Press. this button to.
change the odometer. Ee,ading to- a trip
odometer--teading. P1es.s again ta-retm
the display to the odometer reading.,
The trip odometer can be u-sehl to
measure the actual distance you travel
on a trip. TQ -set it to zero, see TRIP
RESET below. The..adometer will.
ihrninate
with the fgni"tion off .and the
parkifig lights on.
TRIP RESET: With TRIP OD0
selected for, dis.play, .p ms ..and hold.the
TRJP button for two seconds to change
the trip odometer ,reading to zero.
ENG MET This batton chaqp the
display from customary .Uaited States
measures. (English) tu Canadian
measures (mettic).
OH femperature Display
GAUGES: E+& time this button is
prwsed the:
oil temperature
-4 coolant temperature.
.- or battery voltage
will be- digitally displayed.
The displey will change to:
HI OIL
HI COUL
HI VOLT
or LO VOLT,
.If conditions in the. c.prresponding gages
read higher or lower th.m normal.
If the oil mdxoolant ternpxatur.e$ arc
below 32°F (O,*C), the trip monitor will
display LO when the,actual gage
ternpiratwe is displayed I
Coolant Temperature Dtsplay
Battery Voltage Displ,ay

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Substitute Oil (LTI Engine Only)
When adding .oil to maintain engine oil
level, if an oil meeting GM St.aidard
GM4718M is not available, you can use
oil designated either SAE 5W-30 API
Service SG at all temperatures, or SAE
1OW-30 API Service SC at temperatures
above
0°F (-18°C) : This oil should not
be used for an oil change.
Substitute. 01 (LTS Engine Only)
When adding oil to maintain engine oil
level,
if an oil meeting GM Standard
GM4718M is not available, you can use
oil designated. SAE 1OW-30 API Service
SG at all temperatures. This oil should
not be used for an oil change.
Engine 0il.Addifives
Don't add anything to your oil.>Your
Chemolet dealer is ready to
ad a ,'se if
you think something should be ,added. I
When to Change Engine Oil
See if my one of these is true !€or-you:
Most trips are less than 4 miles
(6 lm).
It's below freezing outside and most
trips are less than
10 miles (16 km) .
TEie engine is at low speed most of the
time
(as in stop-and-go traEc).
Most trips are through dusty places.
If any one of these is true for your
vehicle, you need to change
your oil
and filter every 3,000 miles
(5 000 km) or 3 months-whichever
comes first. (See
the Index under
Engine Oil Life Monitor.)
If none of them.is true, change the oil
every 7,500 miles (12 500 lun) or 12
months-whichever comes first.
Change the filter
at the first oil change
and
at every other oil change after that.
(See the Index under Engine Oil Life
Monitor.)

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262
Rear Axle (CONT~)
What to Use:
To add lubricant when the level
use Me Lubricant (GM Part Na
12345977) or SAE BOW-90 GL-5
lubricant. To completely refill after
-draining, add four ounces (118 mQ af
Limited-Slip Dlfferential Lubricant
Additive (GM Part No. 1052358). Zmn
fill to the bottom of the filler plug hole
with Axle ‘Lubricant (GM Part No.
12345977) o,r SAE 8OW-90 GL-5 gear
lubricant.
Engine Coolant
e foUowing explains your cooling
sgstm and how to add coolant when it
is Im. If you have a problem with
e~@e overheating, see the Index under
Engine Ouerheating.
The proper coolant for your Corvette
* Give freezing protection down to
Give boiling protection up. to 262°F
Protect against rust and corrosion.
Help keep the proper engine
Let the warning lights work as they
-3m (-37°C).
(128°C) ~
temperature.
should.
What to Use:
Use a mixture of one-half clean wafer
(preferably distilled) and one-half
antifreeze that
meets “GM Specification
1825-M,” which won’t damage
aluminum parts. You can also use a
recycled coolant conforming to GM
Specification 1825-M with a complete
coolant
flush and refill. If you have the
LTl engine, use GM Engine Coolant
Supplement (sealer)
with any complete
coolant change.
If you use these, you
don’t need to add anything else.

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6 Transmissi-on Servic.e-For.a manual transmission,
the fluid doesnY req.uire changing.
ITEM
NO. SERVICE
For an automatic transmission, change koth the
fluid and f&r every 15,000 miles (25 000 lun) if
the vehicle is mainly dr-iven under .one ox more of,
these conditions:
In heavy city traffic where the outside
temperature regularly reaches 9OoF (32°C) or
higher..
9 In. hilly .or mguntain.ous te.min.
Uses such ,asTound in taxi, police ~ar or delivery
If you do not use your vehicle under- any of these
conditions, change both the fluid and fiiter every
100,000 miles (160 000 lan).
‘6 Spark Plug RepIacement’e-Replaee zpaik plugs
with the proper type. See the Index under
Replacem~ent Parts;
burns, cracks or Other damage. Check the boot fit
at. the coils .and at the spark plugs.. Redtice wires
as needed.
service.
7 Spark Plug Wire Inspection*B-Inspect for