Engine - Lack of Oil Pressure on Start Up

911 Turbo
3/00 1728

Binder - 1, Engine

7-27-00

Lack of Oil Pressure on Start Up

Vehicle Type:
911 Turbo (996)

Model Year:
As of 2001(1)

Concern:
Oil pressure light on, lack of oil pressure when the engine is first started.





Information:
Due to the low position of the turbo-chargers, a non-return (check) valve is installed between the oil tank and the engine (item 2, figure 1). This prevents the oil tank from emptying into the crankcase when the engine is turned off.

In certain cases, this valve could stick in the closed position. This would prevent the flow of oil from the oil tank to the engine. As of May 18, 2000, a modified non-return (check) valve is being installed from engine number M96/70 - 64 1 01282. The new part is identified by a light blue paint dot.

! CAUTION
Possible engine damage due to lack of lubrication!
> Shut engine off immediately.
> Do not attempt to find the cause with the engine running.

Work Procedure:
Replacing the non-return valve.

1. Drain the oil into a clean container.

2. Loosen the oil tank mounting bolts.

3. Remove the two M6x16 hexagon socket head bolts which secure the tank to the check valve (item 4, figure 1).

4. Remove the M8x30 pan-head bolt securing the check valve to the engine (item 5,figure 1).

5. Carefully pull the tank back at the bottom.

6. Turn and guide the non-return valve out of the engine and oil tank (item 2,figure 1).

7. Reverse the procedure to install the new valve.





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