GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 626
ENGINE PERFORMANCE AND TUNE-UP
TUNE-UP PROCEDURES
In order to extract the full measure of performance and economy from your
engine it is essential that it is properly tuned at regul ar intervals. A regular tune-
up will keep your Camaro's engine running smoothly and will prevent the
annoying breakdowns and poor perform ance associated with an untuned
engine.
A complete tune-up should be performed every 30,000 miles (48,000 km). This
interval should be halved if the car is operated under severe conditions such as
trailer towing, prolonged idling, start-and- stop driving, or if starting or running
problems are noticed. It is assumed that the routine maintenance described in
General Information & Maintenance has been kept up, as this will have a
decided effect on the result s of a tune-up. All of the applicable steps of a tune-
up should be followed in order, as the result is a cumulative one.
If the specifications on the underhoo d tune-up sticker in the engine
compartment of your car disagree with th e "Tune-Up Specifications" chart in this
Section, the figures on the sticker must be used. The sticker often reflects
changes made during t he production run.
SPARK PLUGS
A typical spark plug consists of a metal shell surrounding a ceramic insulator. A
metal electrode extends downward through the center of the insulator and
protrudes a small distance. Located at the end of the plug and attached to the
side of the outer metal shell is the side el ectrode. The side electrode bends in at
a 90 angle so that its tip is just pas t and parallel to the tip of the center
electrode. The distance between these two electrodes (measured in
thousandths of an inch or hundredths of a millimeter) is called the spark plug
gap.
The spark plug does not pr oduce a spark, but instead provides a gap across
which the current can arc. The coil produces anywhere from 20,000 to 50,000
volts (depending on the type and application) which travels through the wires to
the spark plugs. The current passes along the center electrode and jumps the
gap to the side electrode, and in doing so, ignites the air/fuel mixture in the
combustion chamber.
GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 779
ENGINE OIL AND FILTER CHANGE
Under normal operating conditions, the oi
l is to be changed every 7,500 miles
(12,000km) or 12 months, whichever occurs first.
Although the manufacturer recommends changing the f ilter at the first oil
change and then at every other oil c hange, (unless 12 months pass between
changes), The editors of this informat ion recommend changing the filter with
each service. It is a small price to pay for extra protection.
When driving conditions frequently include dusty or polluted areas, trailer
towing, idling for long periods of ti me, or low speed operation, or when
operating at temperatures below freezing or driving short distances (under 4
miles or 6.4km), change t he oil and filter more frequently. Under these
circumstances, oil has a greater chance of building up sludge and contaminants
which could damage your engine. If your v ehicle use fits into one or more of
these categories, (as it does for most vehicles), it is suggested that the oil and
filter be changed every 3, 000 miles (1361km) or 3 months, whichever comes
first.
The oil should be disposed of properly after it is drained from the vehicle. Store
the oil in a suitable container and take the container to an official oil recycling
station. Most gas stations or oil and lube facilities will take the used oil at little or
no expense to you.
Oil should always be changed after the engine has been running long enough to
bring it up to normal operating temperature. Hot oil will flow more easily and will
carry more contaminants than will cold oi l. The oil drain plug is located on the
bottom of the oil pan (bottom of the engi ne, underneath the car). The oil filter is
located on the left side of most engines covered by this information. To change
the oil and filter:
1. Run the engine until it reaches normal operating temperature.
2. Raise the front of the vehicle and s upport it safely using a suitable pair of
jackstands.
3. Slide a drain pan of a least 6 quar ts capacity under the oil pan. Wipe the
drain plug and surrounding area clean using an old rag.
CAUTION - The EPA warns that prolonged contact with used engine oil may
cause a number of skin disorders, incl uding cancer! You should make every
effort to minimize your exposure to used engine oil. Pr otective gloves should be
worn when changing the oil. Wash y our hands and any other exposed skin
areas as soon as possible after exposure to used engine oil. Soap and water, or
waterless hand cleaner should be used.
4. Loosen the drain plug using a ratc het, short extension and socket or a
box-wrench. Turn the plug out by hand, using a rag to shield your fingers
from the hot oil. By keeping an in ward pressure on the plug as you
unscrew it, oil won't escape past the threads and you can remove it
without being burned by hot oil.
GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 783
AUTOMATIC TRANSMISSION
FLUID RECOMMENDATIONS
Use only Dexron®II Automati
c Transmission Fluid.
LEVEL CHECK
Fig. 1: Read automatic transmission flui d level on dipstick and add, as required
Check the automatic transmission fluid le vel at each oil change. Driving with too
much or too little transmission fluid ca n damage the transmission. The dipstick
can be found in the rear of the engine compartment. The fluid level should be
checked only when the transmission is at normal operating temperature. If your
Camaro has been driven at highway speeds fo r a long time, in city traffic in hot
weather, or pulling a trailer, wait for about 30 minutes for the fluid to cool down
so a correct reading can be read.
1. Park the car on a level surface, with the parking brake on. Start the
engine and let it idle for about 15 minutes. Move the transmission
through all the gears and then back to P.
2. Remove the dipstick and carefully touch the wet end of the dipstick to see if the fluid is cool, warm, or ho t. Wipe it clean and then reinsert it
firmly. Be sure that it has been pushed all the way in. Remove the
dipstick again and check the fluid leve l while holding it horizontally.
a. If fluid is cool (room temper ature), the level should be about
1/8-3/8
in. (3-10mm) below the ADD mark.
GM – CAMARO 1982-1992 – Repair Guide (Checked by WxMax) 785
The automatic transmission fluid and fi
lter should be changed every 15,000
miles (24,000km) if your Camaro is driven in heavy city traffic in hot weather, in
hilly or mountainous terrain, frequent trailer pulling, or uses such as found in
taxi, police car or delivery service. If your Camaro is driven under other than
listed above conditions, change the fl uid and filter every 30,000 miles
(48,300km).
1. Raise and support the car on jackst ands. Place an oil catch pan under
the transmission.
2. Remove the oil pan bolts fr om the front and sides only.
3. Loosen rear oil pan bolts approximately 4 turns.
WARNING - Do not damage the transmission case or oil pan sealing surfaces.
4. Lightly tap the oil pan with a rubber mallet or gently pry it downward to
allow fluid to drain.
5. Remove the remaining oil pan bolt s, then remove the oil pan and pan
gasket.
6. Remove the filter and seal.
7. Clean the transmission case and oi l pan gasket surfaces with suitable
solvent and air dry. Make sure to re move all traces of the old gasket.
To install: 8. Coat the seal with a sm all amount of Transjel®.
9. Install the new s eal onto the filter.
10. Install the new filter into the case.
11. Install the oil pan and new gasket.
On 1991 and later vehicles, inspect t he oil pan screws and washer assemblies.
The screws must not be used if the coni cal washer is reversed. Failure to
replace the screw and washer assembly may result in improper fastening of
system components.
12. Install the oil pan bolts and tighten them to 12 ft. lbs. (16 Nm).
13. Lower the car.
14. Fill the transmission to proper level with Dexron®II fluid.
15. Check cold fluid level reading fo r initial fill. Do not overfill the
transmission.
16. Follow the fluid level che ck procedure described before.
17. Check the oil pan gasket for leaks.