Tech Tip: Porsche 911 Turbo Lack of Oil Pressure on Start Up – UnderhoodService

Tech Tip: Porsche 911 Turbo Lack of Oil Pressure on Start Up

Your customer may experience an instance where the oil pressure light comes on and there is a lack of oil pressure when the engine is first started.

Affected Vehicle: 911 Turbo (996), as of 2001(1)

Information: Due to the low position of the turbo-chargers, a non-return (check) valve is installed ­between the oil tank and the engine (see Fig. 1, item 2). 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, preventing 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 the lack of ­lubrication!
• Shut off engine immediately.
• Do not attempt to find the cause with the engine running.

Service 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 (see Fig.1, item 4).
4. Remove the M8x30 pan-head bolt securing the check valve to the engine (see Fig. 1, item 5).
5. Carefully pull the tank back at the bottom.
6. Turn and guide the non-return valve out of the engine and oil tank (see Fig. 1, item 2).
7. Reverse the procedure to install the new valve.

Courtesy of Identifix.

You May Also Like

How (And Why!) To Clean An Engine

Beauty is more than skin deep. Here are 11 steps to help clean any car’s engine compartment.

A well-kept car looks amazing when rolling down the street, and it drives better. But, more driving means exposing a car to pebbles, grime, greasy and oily residues, dirt and particles. This unwanted debris can also accumulate under a car’s hood.

For a car owner to enjoy the beauty of a clean car, it’s vital to address the cleanliness of the interior, exterior and under the hood — the engine.

Spark Plug Fouling

Understanding why spark plugs get dirty.

Aging Plastic Intake Components May Cause Leaks

BMW valve covers and intake manifolds made of plastic are susceptible to warpage and gasket failure.

Diagnosing Intercooler Boost Trouble Code P0299

The criteria for setting the code is very basic.

Understanding Coolants

All-season coolant used inorganic acid technology and worked great for almost 30 years.

Other Posts

Misfire Codes P0300, P0301-P0312 and P0313+P0314

The only way to clear the code is to use a crankshaft position relearn with a scan tool.

Belt-In-Oil Timing Systems

Oil contamination of the belt drive has been a death sentence, due to the rubber and fiber construction of the belt.

What Caused The Turbo To fail?

Up to 50% of turbocharger failures are due to oiling problems.

New Oil Specifications

Many 0W16 oils have a new donut certification mark on the bottle called API SN-PLUS and SN-PLUS Resource Conserving.