Oil pressure on a /6 under load Options

[SirAndy]

When did it start?
Didn't you have an oil pressure problem a while back?
Something about a sudden loss of pressure?
Or am I mis-remembering?

Yes, this is the inverse of my previous problem ...
(IMG:style_emoticons/default/sad.gif)

PS: I noticed it during the WCR trip

[Spoke]

What viscosity oil are you running? I run 20W-50 in my 3.3L.

[Mark Henry]

IIRC there is a oil pressure relief somewhere on the 3.6, I'd check it's operation.
Do the mechanical gauge temporary taped to the rear window so you can see it in the RVM trick, I've done it a few times for fuel pressure issues, works well.

[SirAndy]

What viscosity oil are you running? I run 20W-50 in my 3.3L.

Mobile1 0-40 per Porsche recommendations, i've been running that same type of oil for 15 years now.
(IMG:style_emoticons/default/idea.gif)

[SirAndy]

IIRC there is a oil pressure relief somewhere on the 3.6, I'd check it's operation.
Do the mechanical gauge temporary taped to the rear window so you can see it in the RVM trick, I've done it a few times for fuel pressure issues, works well.

I know of the pressure relief valve, which is a contender.


Stupid question, could a clogged up oil filter cause this?
(IMG:style_emoticons/default/idea.gif)

[Dave_Darling]

The 993 used two oil filters. One of them may have been where the cooler was on earlier engines? I forget.... I do know it was harder to access than the standard one, though. Does your car have the on-engine cooler, or just the remote one?

--DD

[SirAndy]

The 993 used two oil filters. One of them may have been where the cooler was on earlier engines? I forget.... I do know it was harder to access than the standard one, though. Does your car have the on-engine cooler, or just the remote one?

I have two and yes, one is in the location where the on-the-engine oil cooler would be on other /6 engines and the second one is in the stock location on the tank.

(IMG:style_emoticons/default/popcorn[1].gif)

[Tdskip]

Sounds like something may be constricting oil flow - agree with others that it sounds high.

Maybe change oil/filters and see if it comes back down some.

Given cost of these engines getting a sanity check mechanical gauge on it seems like a good idea.

[McMark]

The pressure range of the sender will be stamped here. There are a few numbers on each face. The one in the picture says 30/16 (?) which should be the 30th week of 2016. You'll probably need an inspection mirror, or a borescope to see in there accurately, but you may get lucky with a phone picture or video.

[porschetub]

IIRC there is a oil pressure relief somewhere on the 3.6, I'd check it's operation.
Do the mechanical gauge temporary taped to the rear window so you can see it in the RVM trick, I've done it a few times for fuel pressure issues, works well.

I know of the pressure relief valve, which is a contender.


Stupid question, could a clogged up oil filter cause this?
(IMG:style_emoticons/default/idea.gif)

Not a stupid question really,I don't think so because you should have over pressure valves in your filter housings,or atleast I know there's one in the tank filter housing on my car...spring and ball on a round seat.
Even if your system is different the filters themselves should have in built reliefs but I don't know @ what pressure they bypass.

[Mark Henry]

IIRC there is a oil pressure relief somewhere on the 3.6, I'd check it's operation.
Do the mechanical gauge temporary taped to the rear window so you can see it in the RVM trick, I've done it a few times for fuel pressure issues, works well.

I know of the pressure relief valve, which is a contender.


Stupid question, could a clogged up oil filter cause this?
(IMG:style_emoticons/default/idea.gif)

Not a stupid question really,I don't think so because you should have over pressure valves in your filter housings,or atleast I know there's one in the tank filter housing on my car...spring and ball on a round seat.
Even if your system is different the filters themselves should have in built reliefs but I don't know @ what pressure they bypass.

They don't really bypass at high pressure, they bypass at a differential in pressure of the in/out sides. It's not a big number maybe 10 psi difference. What controls the pressure in the circuit is the engines pressure relief valve(s).
If it's not the sensor I'd do a full oil change, cut open the filters, check the sump and check the operation of the pressure relief valve...
I'd still hook up or T in a mechanical pressure gauge first.

[porschetub]

IIRC there is a oil pressure relief somewhere on the 3.6, I'd check it's operation.
Do the mechanical gauge temporary taped to the rear window so you can see it in the RVM trick, I've done it a few times for fuel pressure issues, works well.

I know of the pressure relief valve, which is a contender.


Stupid question, could a clogged up oil filter cause this?
(IMG:style_emoticons/default/idea.gif)

Not a stupid question really,I don't think so because you should have over pressure valves in your filter housings,or atleast I know there's one in the tank filter housing on my car...spring and ball on a round seat.
Even if your system is different the filters themselves should have in built reliefs but I don't know @ what pressure they bypass.

They don't really bypass at high pressure, they bypass at a differential in pressure of the in/out sides. It's not a big number maybe 10 psi difference. What controls the pressure in the circuit is the engines pressure relief valve(s).
If it's not the sensor I'd do a full oil change, cut open the filters, check the sump and check the operation of the pressure relief valve...
I'd still hook up or T in a mechanical pressure gauge first.

Yes ,but my point was unless there is a restriction on the return system it's otherwise well taken care of.
I still vote for oil pressure valve check after doing a mechanical gauge test.