2007 CHEVROLET CORVETTE check engine

Checking Engine Oil (Z06 Only)
A. Engine Oil Dipstick
B. Engine Oil Fill CapIt is a good idea to check the engine oil level
every time you get fuel. In order to get an accurate
reading, the oil must be warm and the vehicle
must be on level ground.
The engine oil dipstick handle is a yellow loop.
The dipstick is located on the dry sump engine
oil tank. SeeEngine Compartment Overview
on page 330for the location of the dry sump
engine oil tank.
Z06 models have a racetrack-ready dry sump
engine lubrication system. This high-performance
system operates differently than a standard
engine lubrication system and requires a special
procedure when checking the engine oil level.
Follow this procedure closely when checking the
engine oil level.
334

The engine oil level must be checked when the
engine is warm. Cold oil level in the dry sump tank
may not indicate the actual amount of oil in the
system. With this system, engine oil is contained
in an external tank, separate from the engine.
Under normal operating conditions, the oil
pan under the engine does not store any oil.
If the vehicle has been parked for an extended
period without the engine being started, some
oil will seep back into the oil pan, reducing
the amount of oil held in the dry sump tank
and there could be no engine oil at all showing
on the dipstick. This is normal since the
dipstick is designed to read engine oil level
only after the engine has run long enough
to reach normal operating temperature.Do not add engine oil based on cold engine
dipstick readings. The engine oil level on the
dipstick will also be inaccurate if checked while
the engine is running.
1. To obtain an accurate engine oil level reading,
warm up the engine to at least 175°F (80°C).
Cold oil will not give a correct oil level reading.
2. Once the engine is warm, turn off the engine.
Checking the oil while the engine is running
will result in an incorrect oil level reading.
3. Wait at least ve minutes (but not more
than 20 minutes) to allow oil to drain and
settle in the engine.
4. Remove the dipstick from the external engine
oil tank and clean it with a lint-free paper
towel or a cloth. Re-insert the dipstick into
the external oil tank, pushing it all the way
in until it stops.
5. Remove the dipstick from the oil tank and
read the level on the cross-hatched area.
Oil levels that fall in the cross-hatched
area are normal.
335

A. Engine Oil Drain Plug
B. Seal
1. Remove the two engine oil drain plugs
from the bottom of the engine oil pan.
One drain plug drains the external oil tank
via the oil transfer supply line. The other
drain plug drains residual oil from the
crankcase sump. Allow the oil to drain.2. Once the oil has been drained from the
engine, remove the engine oil lter and
allow the oil to drain.
3. Re-install both drain plugs and tighten them
to 18 lb ft (25
Y).
4. Replace the oil lter and tighten it to
18 lb ft (25
Y). SeeNormal Maintenance
Replacement Parts on page 445for the
correct lter.
5. Oil is lled through the opening in the top
of the external engine oil tank. Remove the
oil ll cap.
6. Add eight quarts (7.6 L) of oil to the oil tank.
SeeCapacities and Specications on
page 426.
7. Install the oil ll cap and insert the dipstick,
if removed.
8. Start the engine and let it run at idle for at
least 15 seconds. This will circulate the
fresh engine oil through the lubrication system.
9. Shut off the engine and check the oil level
as described under “Checking Engine Oil
(Z06 Only).”
338

When the system has calculated that oil life has
been diminished, it will indicate that an oil change
is necessary. A CHANGE ENGINE OIL message
will come on. Change your oil as soon as possible
within the next 600 miles (1 000 km). It is
possible that, if you are driving under the best
conditions, the oil life system may not indicate
that an oil change is necessary for over a
year. However, your engine oil and lter must
be changed at least once a year and at this
time the system must be reset. Your dealer
has GM-trained service people who will perform
this work using genuine GM parts and reset
the system. It is also important to check your
oil regularly and keep it at the proper level.
If the system is ever reset accidentally, you
must change your oil at 3,000 miles (5 000 km)
since your last oil change. Remember to reset
the oil life system whenever the oil is changed.How to Reset the Engine Oil Life
System
The Engine Oil Life System calculates when to
change your engine oil and lter based on vehicle
use. Anytime your oil is changed, reset the
system so it can calculate when the next oil
change is required. If a situation occurs where
you change your oil prior to a CHANGE ENGINE
OIL message being turned on, reset the system.
To reset the CHANGE ENGINE OIL message
after an oil change, do the following:
1. Press the TRIP button so the OIL LIFE
percentage is displayed.
2. Press RESET and hold for two seconds.
OIL LIFE REMAINING 100% will appear.
If the CHANGE ENGINE OIL message comes
back on when you start your vehicle, the engine
oil life system has not reset. Repeat the procedure.
341

Hydraulic Clutch
It is not necessary to regularly check clutch uid
unless you suspect there is a leak in the system.
Adding uid will not correct a leak.
A uid loss in this system could indicate a
problem. Have the system inspected and repaired.
When to Check and What to Use
The hydraulic clutch
uid reservoir cap
has this symbol
on it. SeeEngine
Compartment Overview
on page 330for
reservoir location.Refer to the Maintenance Schedule to determine
how often you should check the uid level in
your clutch master cylinder reservoir and for
the proper uid to use. SeeOwner Checks
and Services on page 438andRecommended
Fluids and Lubricants on page 443.
How to Check and Add Fluid
Make sure the uid level is at the MIN (Minimum)
line on the side of the reservoir. If it is not,
remove the cap and add the proper uid until
the level reaches the MIN line.
346

What to Use
Use a mixture of one-half clean, drinkable water
and one-half DEX-COOL®coolant which will
not damage aluminum parts. If you use this coolant
mixture, you do not need to add anything else.
{CAUTION:
Adding only plain water to your cooling
system can be dangerous. Plain water,
or some other liquid such as alcohol, can
boil before the proper coolant mixture will.
Your vehicle’s coolant warning system
is set for the proper coolant mixture. With
plain water or the wrong mixture, your
engine could get too hot but you would
not get the overheat warning. Your engine
could catch re and you or others could
be burned. Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
®coolant.Notice:If you use an improper coolant
mixture, your engine could overheat and be
badly damaged. The repair cost would not be
covered by your warranty. Too much water
in the mixture can freeze and crack the engine,
radiator, heater core, and other parts.
If you have to add coolant more than four times
a year, have your dealer check your cooling
system.
Notice:If you use extra inhibitors and/or
additives in your vehicle’s cooling system,
you could damage your vehicle. Use only
the proper mixture of the engine coolant
listed in this manual for the cooling system.
SeeRecommended Fluids and Lubricants
on page 443for more information.
348

Checking Coolant
The engine coolant
surge tank is located
toward the rear of the
engine compartment
on the driver’s side of
the vehicle. SeeEngine
Compartment Overview
on page 330for more
information on location.
{CAUTION:
Turning the surge tank pressure cap when
the engine and radiator are hot can allow
steam and scalding liquids to blow out
and burn you badly. Never turn the surge
tank pressure cap — even a little — when
the engine and radiator are hot.The vehicle must be on a level surface. When
your engine is cold, the coolant level should
be at the FULL COLD mark. The FULL COLD
mark is on the front of the coolant surge tank.
Do not overll the surge tank. Too much coolant
can result in an overow when the uid is hot.
Adding Coolant
If you need more coolant, add the proper
DEX-COOL®coolant mixture at the surge tank,
but only when the engine is cool.
{CAUTION:
You can be burned if you spill coolant
on hot engine parts. Coolant contains
ethylene glycol, and it will burn if
the engine parts are hot enough.
Do not spill coolant on a hot engine.
When replacing the pressure cap, make sure
it is hand-tight and fully seated.
349

If you no longer have the overheat warning,
you can drive. Just to be safe, drive slower for
about 10 minutes. If the warning does not
come back on, you can drive normally.
If the warning continues and you are not
stopped, pull over, stop, and park your vehicle
right away.
If there is still no sign of steam, you can idle the
engine for three minutes while you are parked.
If you still have the warning, turn off the engine
and get everyone out of the vehicle until it
cools down. Also, see “Overheated Engine
Protection Operating Mode” later in this section.
You may decide not to lift the hood but to get
service help right away.Overheated Engine Protection
Operating Mode
If an overheated engine condition exists and the
messages COOLANT OVER TEMPERATURE
and REDUCED ENGINE POWER are displayed,
along with the Check Engine light, an overheat
protection mode which alternates ring groups of
cylinders helps prevent engine damage. In
this mode, you will notice a loss in power and
engine performance. This operating mode allows
your vehicle to be driven to a safe place in an
emergency; you may drive up to 50 miles (80 km).
Notice:After driving in the overheated
engine protection operating mode, to avoid
engine damage, allow the engine to cool before
attempting any repair. The engine oil will be
severely degraded. Repair the cause of coolant
loss, change the oil and reset the oil life
system. SeeEngine Oil on page 333.
352