Big Dave

I was looking through my Service Info Tech manual for my '85 and noticed that there's supposed to be a "safety valve" at position "f" in the picture. Mine is missing, and I don't recall it ever being there.

Has anyone with an '85 or '86 ever seen this item? Does it have a part #? What would happen if it's missing???

Does anyone have a real picture of it???

928drvr86.5

mine has it, i noticed it this spring when i did my intake R&R.

Lizard928

my engine has it as well, it more looks like a restrictor imo, I will take a picture of it when I am tearing this engine out.

Big Dave

Thanks for the replies. Does anyone have a part # for this valve?

BrianG

It is a flow restrictor for the flakey Porsche PCV system on the 928.....

Lizard928

I can tell you right now from having held it in my hand that there is no part # on the one I have.

Lizard928

Dave, there is only one answer for you, seeing as how you have the engine out anyways, why not drysump it?

lorenolson888

yup...

that is how it should be...

I guess that it means that Positive cranckcase pressure is going to your intake, pre throttle all the time as opposed to only at higher loads..

And the whole neck has been superceded with the later plastic filler.. so I would not imagine that it can be ordered... the gasket/baffle plate is also a part you can't order....

maybe devek still has some of the aluminum sheet ones if you need the baffle...

LO

Big Dave

I do have the metal gasket/baffle plate in the filler neck from my last rebuild effort.

I'll have to check the hose itself...maybe I'm lucky and it's wedged inside the hose. *shrug*

Big Dave

How would it affect engine performance? Could it affect idle stability??

Big Dave

Why turn a quest for a valve into an expensive mod???

Still looking for a part number for this valve. Anyone?

lorenolson888

The new filler neck is like $200...

I think that a wrecking yard may be the only source as porsche was able to replace the PN for the neck, valve and baffled gasket with the one part #...

The plastic neck has the valves built in...

I stuck with mine because I had the think powdercoated before I realized I coule not get the gasket... the devek baffle I bought was just a sheetmetal plate, but a little yamabond and it has not leaked since I put it in.... which is more than I can say for the stock one...

LO

Lizard928

to eliminate the problematic crrankcase breather system.

SwayBar

A dry-sump on a street car would be a waste of money as it's not needed; no doubt though, it would be extremely cool.

Lizard928

you haven't driven in my car plus if you add boost to these engines IMO it is worth it.