Cowl: Testing and Inspection
Water Drains In Front Cowel Area
Vehicle Type: 911 Carrera (996) / 911 Carrera 4 (996)
Model Year: 1998 (W) and 1999 (X)
Concerns: Water leakage in passenger compartment caused by blocked water drains.
Information: The water drains located in the front cowel area can get blocked by leaves or pine needles on vehicles which are often parked under or near trees. This can lead to water leaking into the passenger compartment.
The water drains in the front cowel area have been modified as of model year 00 (Y).
In the event of complaint, the water drains in the front cowel area are to be modified on MY 99 (X) vehicles.
Part Numbers:
Part Number Description
999703 484 40 Rubber sleeve of water drain (Figure 1), 25 mm, 2 ea. required (see also Figure, arrows A and C)
999 703 476 40 Rubber sleeve of water drain (Figure 1), 30 mm, only Carrera 4 (arrow G)
996 572 661 00 Cover, Vehicle Ident. No. (arrow H)
Tools:
Pointed-nose pliers
Curved pointed-nose pliers
Slotted screwdriver (small)
Work Procedure: Modifies the water drains in front cowel area, MY 99 only.
1. Raise vehicle on lifting platform.
2. Remove the front cowel area covers and the battery cover, see Repair, Removing/installing cowl panel cover.
3. Work on water drain to the right of the battery (see Figure, arrows A and B) (change rubber sleeve).
Caution:
- Paint damage/corrosion can be caused by improper handling of the tool!
- Work carefully when removing the rubber sleeves.
3.1 Remove rubber sleeve (arrow A). To do so, push a small slotted screwdriver between the rubber sleeve (arrow A) and the drainage hose (arrow B) and undo the drainage hose from the rubber sleeve. Push the drainage hose down as far as possible and out of the rubber sleeve.
3.2 Remove rubber sleeve upwards using a pair of curved pointed-nose pliers. The drainage hose (arrow B) can not be removed and remains in the vehicle without being used.
3.3 Install new rubber sleeve 999.703.484.40. To do so, press the drainage hose to one side if necessary. Dampen the outside of the rubber sleeve with some water for easier installation.
4. Work on water drain to the left of the battery (arrows C, D and E) (change rubber sleeve).
4.1 Raise the vehicle with the platform lift until the wheels are free.
4.2 Carefully remove the rubber ring (arrow E) in the left wheel housing using a small slotted screwdriver or a pair of pointed-nose pliers.
4.3 Grip the drainage hose (arrow D) from the wheel housing using a pair of pointed-nose pliers and at the same time carefully press the rubber sleeve (arrow C) downwards from above out of the body. Pull the drainage hose out of the body with the rubber sleeve.
4.4 Install new rubber sleeve 999.703.484.40. Dampen the outside of the rubber sleeve with some water for easier installation.
5. Work on water drain on the outer left (arrow F) (remove rubber sleeve).
5.1 Press the rubber sleeve (with flap) into the wheel housing from the front cowel area side.
6. In addition for 911 Carrera 4 (996): Work on water drain on the outer right (arrow G) (change rubber sleeve).
6.1 Remove rubber sleeve (with flap) upwards. To do so, grip the rubber sleeve from the top using pointed-nose pliers and press out of the body from the wheel housing side.
6.2 Install new rubber sleeve 999.703.476.40. Dampen the outside of the rubber sleeve with some water for easier installation.
7. Work on the right front cowel area cover (arrow H) (install clear plastic cover).
7.1 Clip the clear plastic cover, 996.572.661.00, into the rectangular recess (arrow H) of the right front cowel area cover.
8. Lower the lifting platform.
9. Reinstall front cowel area covers and battery cover.
Literature: 911 (996) Technical Manual, Group 7:
Repair: 70 22 19 Removing/installing cowl panel cover
Repair: 50 93 30 Cleaning front water drains
Important Notice: Porsche Cars N.A Technical Bulletins are intended for use by professional technicians, not a "Do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Special tools may be required to perform certain operations identified in these bulletins. Use of tools and procedures other than those recommended in these bulletins may be detrimental to the safe operation of your vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your Porsche Dealer for information on whether your vehicle may benefit from the information. Part numbers listed in these bulletins are for reference only. Always check with your authorized Porsche dealer to verify correct part numbers.