- Jack up the car onto 4 jack stands
Please refer to "How
to jack your car up" section for details. Remove the right rear
- Loosen rocker panel
Remove the 4 philips screws that holds the plastic panel on the bottom right side of
the car. Unbolt the 10 mm plastic bolts that holds the entire
panel on the bottom right side of the car. Pull the cover off around
the jack stand position area, and pull down the side panel, you will not
need to remove the panel completely to access the oil tank drain plug and
oil tank filter.
- Loosen rear fender liner
Remove the 10 mm plastic bolt in the rear wheel well area. Pull the wheel well
panel back to gain access to the oil tank filter.
- Drain the oil tank and replace filter
Place the oil pan underneath the oil
tank drain plug You will have less chance of spilling if you prop up the drain pan.
Undo the drain tank plug using the 15 MM 6 point rachet.
Remove the oil tank filter through the rear wheel well panel opening that has been pulled back.
After you have drained the oil from the oil tank, replace the washer and o-ring on the oil tank drain plug and
tighten to 40 ft lb of torque
When installing the new filter ( long one ), it is a good practice to
check if the rubber seal hasn't fallen off the old oil filter and is stuck
on the oil tank before you installing the new filter.
This used to happen
a lot back in the old days, where the new filter is installed with
the old oil rubber seal still stuck on the oil tank, we call it "Double
gasket". Leaking will occur when that happens.
the new filter make sure you don't over tighten. Remember to hand tighten only.
- Remove engine undertray and transmission undertray
Both the engine undertray and transmission undertray use Dzus style fasteners;
¼ turn unlocks and releases the screws.
For the engine undertray, there are 5 fasteners that hold it up.
For the transmission undertray, loosen the Dzus fasteners, and then slide the panel
out toward the rear of the car.
- Drain crankcase oil
Place the oil
pan under the engine drain plug, and unbolt the drain plug to drain the
oil from the crank case. After the oil has drained, replace the washer and retighten
the drain plug back at 40 ft lb of torque.
You do not need to remove the left side ventiliation hose. The oil will still drain properly
with it in place.
The drain plug is magnetized and you will see a small amount of metal shavings on the
plug. This is normal and should not be cause for alarm. However, if you see a large amount
of shavings, you should consult your mechanic.
- Remove the right side ventilation hose
Remove the right
side ventilation rubber hose and "r" shaped ventilation door. There
are a total of three straps you will need to loosen.
- Remove the oil return line
In order to remove the engine
oil filter ( small one ) you will need to move the oil return line out a way.
(A trick told by a Porsche mechanic) It is possible to remove the
oil filter without moving this tube, but it is easier this way.
This picture shows how the oil return line blocks the oil filter from dropping
There is only one bolt that holds the oil return line on.
In order to remove the oil return line out
from the engine case you will need to use a flat screw driver slowly and
carefully pry out the oil return line from the engine block once the bolt
Place the oil pan underneath this line before
it is pull out of the engine case, oil will come purring out of this line
once it is pulled out.
This picture shows the oil return line removed. You can also see the oil
filter wrench already on the engine oil filter.
- Replace the engine oil filter
The small oil filter is located under the right side of the car, behind the rear axle.
Remove the small filter and replace it with a new one. Remember to apply a small amount
of oil to the oil filter seal, make sure that you haven't "Double Gasket" 'ed, and to
hand tighten only.
- Reinstall the oil return line
When reinstalling the oil return line, you may have problems with getting the bolt hole to match
up properly. The oil return line is metal, however, if you follow it up about 8
inches, there is a rubber connector section. You can use massage this rubber section
to get the bolt hole to line up with the crankcase.
In this picture, I have shaded the rubber connector portion in red
Note: The service manuals recommend changing the o rings for the oil return pipe when ever
you take out the oil return pipe. However, I am unclear about the part numbers. The parts catalog
show 2 possible part numbers: 999.707.316.40 and 999.707.309.40.
- Reinstall the rubber ventiliation hose
Reinstall the ventiliation door by tightening the 3 hose clamps.
- Drain turbo resevoirs ( for 993 TT's only )
Each turbo contains a small oil resevoir. The amount of oil should be the same in each
oil resevoir. If they are not, then that indicates a turbo sealing ring failure and you
should probably consult your mechanic.
Use two small plastic cups (ie, 12 oz each) to collect the oil on each side and verify that they
contain the same amount of oil. Be sure to replace the washer when reinstalling the drain plugs.
- Add oil
Pour 9 quarts of oil in. The pouring process gets back up once you get about 8 quarts in the oil
tank, you will need to slow down the pouring process or back up will occur.
Start the engine check the oil level and pour more if needed. Use the dipstick to check the
oil level. The dipstick only registers the last 1.5 quarts of oil, so don't be alarmed if
you don't see anything on the dipstick before 9 quarts.
I usually end up pouring 10.5 quarts of Mobil 1.
If you followed the above procedure exactly you will need to put in 10.5 quarts of oil.
This should save you sometime to figure out how many quarts of oil to put
in. With 10.5 quarts the needle for oil tank level gauge on the dash
will point at 3:00 colock position once the car is fully warmed up and
oil thermostat open.
Using a funnel will help you avoid spilling in the engine compartment. Also, if you have
a turbo, you can remove the intercooler shroud to get better access to the oil filler pipe.
You've completed your DIY oil change. Go out for a drive and enjoy your p-car for another 5000 miles.