Preliminary Work

Information 

If vehicles have fault entries relating to oil pressure, oil pump activation, oil pressure monitoring, etc. in the DME control unit (and a warning light comes "on" on the instrument cluster), proceed as follows:

• Check the oil level. 
• Delete related faults. 
• Do not replace components, such as the oil pump, oil pressure sensor or oil pressure control valve if you suspect that they are faulty. 

If the vehicle has not been driven for a long time (months), the control mechanism in the oil pump can become stiff ("stick").

Very short trips and a lot of loading/manoeuvring can cause the oil to become very diluted => Oil pressure very low. For example, 20 cold starts in quick succession can reduce the viscosity of the engine oil by 30%.

• Change the engine oil. Test-drive the vehicle. 
• If error messages/warnings are displayed again, proceed in accordance with the instructions under Guided Fault Finding in the PIWIS Tester. 

1. Remove Y-pipe or intake pipes upstream of the throttle valve to create unrestricted access to the drive belt and to the oil pressure sensor. → Removing air box for throttle housing (intake pipe upstream of throttle valve)
2. Remove drive belt in the area of the lower deflection roller. For details, see → Removing drive belt
3. Remove oil dipstick with tube. -1- 
   Fig 1: Identifying Oil Guide Housing With Accessories

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   1. Guide tube
   2. O-ring
   3. Screw, M6 x 16
   4. Oil dipstick
   5. O-ring
   6. Screw, M6 x 25; timing-case cover to oil guide housing
   7. Oil level sensor
   8. O-ring
   9. Joint flange
   10. Screw, M6 x 20
   11. Screw, M6 x 16
   1. Direction of travel
4. Remove deflection roller between the vibration balancer and the generator. To do this, use a small screwdriver to prise off the lid and loosen the screw. Remove deflection roller with screw. -1- 
   Fig 2: Identifying Belt Drive

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
   1. Deflection roller
   2. Hydraulic belt tensioner; tensioner to lever
   3. Screw, M8 x 96; complete lever to timing-case cover and cylinder head
   4. Deflection roller
   5. Dual poly-V-belt