6.0-928S

I've seen it a million times but I've done multiple searches & can't find it. Does anyone have the engine oil flow diagram showing the route of the oil through the engine?

TIA, Hammer

Landseer

Covers the 2 cam car at least:
CD set, section 2.15 / Other / 928 Vehicle Description:

Rob Edwards

This one?

EDIT: Too slow on the draw.....

Landseer

You get higher marks for readability.

Landseer

And for 32 V

( CD / 2.15 / service info by year / service info tech 85 )

6.0-928S

Wow, thanks for the quick response!

Regards, Hammer

IcemanG17

great info!!!!

Mike Frye

Seriously, is this place great or what?

I'm on other car forums and you're luck if the info to crap ratio is 1 to 4 or 5 and you usually have to wait at least a day for anything that will help.

Here? Less than 30 minutes from initial thread start to 2 WSM diagram pages posted. And they were both the right ones!
Nice work gentlemen!

Landseer

The hero here is a guy named Morehouse.

UKKid35

Is the oil pressure relief valve maintenance free?

Do you ever need to change the spring?

Does it sag with age, reducing oil pressure?

Can it fracture?

In my other car (Cerbera) the pressure relief valve spring fractured and a fragment found its way into the oil pump causing devastation, hence my interest

FredR

Given that Porsche kitted the car with an oil pressure gauge that goes full scale at 5 barg it would seem reasonable that they were not really interested in oil pressure above that mark. The definitive test for oil pressure is specified as a certain pressure at a specific rpm point and the numbers I have in my head are something like 4 barg at 3000 rpm on a fully warmed up motor- hopefully someone will chime in with the exact numbers.

Thus I would conclude that if you are having difficulty making such numbers investigation is clearly warranted but other than that do not be too concerned. If one were to rebuild one's motor then fitting a new spring ought to be a no brainer. Never heard of anyone routinely changing out at a given mileage but on a 30 year old motor why not?

GregBBRD

I've never seen one broken. Have seen them weak and have changed them to get better pressure. Have also added shims to increase the spring pressure.
The "rule of thumb", in the high performance engine world, is 10 lbs of pressure for every 1,000rpms, with the oil hot.
However, different engines do have different requirements, depending on how the oiling system is configured, how much bearing clearance is present, and how much the crankshaft flexes at different rpms. For instance, I'd be concerned if my 427 Ford steel crank "Y" block engines didn't have 100psi at 7,000 rpms.