Oil strainer screen versus oil strainer plate

[tculling]

I have two plates for my oil strainer- one has a drain plug and the other one does not. The problem I have is if I try to use the one with the plug it does not fit with my strainer screen. I would like to use the plate with the plug so I could change my oil with out taking the plate off. Is there a different screen that you use if it has the drain plug in the plate. I have uploaded pictures of my screen and the two plates.
Thank you.

[HaroldMHedge]

The factory issued TSB 8510 due to the earlier pumps without an attached screen (911-107-008-01 and 930-107-008-02) being NLA. New pumps with the screen (911.107.008.05 and 930-107-008-04) need to use the convex cover with out the drain plug (930-101-902-00).

If you really want to use the older cover with the drain plug. I believe a spacer could be made, use longer studs along with 2 gaskets would work. Please note that I've never done this.

[stownsen914]

It is possible to fab a weld a drain plug bung to the convex plate (I'm about to do this for the convenience factor). Or there are aftermarket sump plates in the later style that have the drain plug.

[911 SLANT]

Why don't you use the other oil strainer that works with the flat sump plate or use a aftermarket aluminum curved sump plate with plug like suggested.

[911 SLANT]

Here are some choices

[Walt Fricke]

The different screen isn't really a choice, as the screen he has isn't detachable. But the aftermarket aluminum sump will work. Or you could weld a bung onto the curved newer plate, off to one side and mounted so the bung and plug aren't near where the suction tube is.. And dimple the screen a bit to fit, but you ought not to need to do much of that - the bung should be as long as your plug so nothing protrudes inside.

[JackkTheMackk]

Upgrade to an aftermarket aluminum plate and call it a day. Our host sells them for $100.

[stownsen914]

If you decide to get the aftermarket plate, make sure you get the correct one. The one shown in post #5 looks correct. The one in post #7 looks like the early, flat style that won't fit your screen.

[tculling]

Thanks guys, I really appreciate all the information you have provided! Didn't realize there was the difference between the old and new oil pump screens. I think I will spend the money and go with the one from our host.

[JackkTheMackk]

Originally Posted by stownsen914

If you decide to get the aftermarket plate, make sure you get the correct one. The one shown in post #5 looks correct. The one in post #7 looks like the early, flat style that won't fit your screen.

No, this is concave and fits a late pump screen exactly like OP needs. It’s for the GT3 pump in my 3.2ss.

[stownsen914]

Gotcha. The flat bottom threw me off I guess.

[Walt Fricke]

I prefer studs to bolts for most engine fastener applications. Better to have steel nut on steel stud threads than steel bolt threads on aluminum threaded holes, at least for an item frequently removed. Yes, the drain plug means you don't have to pull the plate for every oil change, but there are benefits long term. Easy enough to remove studs and install slightly longer ones as needed.

[7783911]

i am a bit confused (whats new) about which plate to select, my cover has the existing drain plug and i wish to add a Fumoto drain.

Q1: will that be an issue since it just replaces the existing bolt
Q2: or given the volume is in the tank, is that a better location for the fumoto?
Q3: Do both drain bolts?

bob

[NorthernThrux]

If you are going to use the Fumoto valve, the only safe place is the oil tank. The sump is quite exposed and if you drive over something unexpected, you will snap the valve. It's not protected at the sump.

[HaroldMHedge]

I agree with Northern Thrux on the use of the Fumoto valve.

Here's a link to Pelican's correct cover for the later oil pumps.



Porsche Oil Sump Plate Kit With Drain Plug For Use With Turbo Or 993 Oil Pump

Ebay also has one that is simular to the factory cover but with a drain valve.



Porsche 911 930 74-83 Engine Oil Sump Plate With Drain Plug

[b. hilliard]

Id like to revisit this thread as I have a similar condition that I'd like clarity on. I've owned my '78 SC for over 20 years; when I purchased it, it had the convex sump plate with no drain plug. After a few seasons, I swapped over to (what I thought) was the standard plate with a plug to aid in my changes. I don't recall there being an issue with clearances with the screen or pump, otherwise I wouldn't have done it. Please see pictures attached. I'm due for my spring oil change, so I plan on dropping the plate to see what's what, but I haven't had to do that in years.
My question....How do I know if I really SHOULD have the other non-drain plug sump plate on? For background, the engine was rebuilt many years ago by a well regarded Porsche shop, with some upgrades.
Thank you!

[Mark Salvetti]

You should be able to tell if you can get the car high enough to peer into the drain hole. I suspect you'll just see the solid metal cover of the newer screen made for the older oil pumps without the attached screen. The drain plug over to the left side (instead of inline with the case seam) is necessary with the newer screen.

If you have a screen like the first post, I doubt your plate/plug would fit.

Mark

[b. hilliard]

Hi Mark-
Thanks so much for the reply. I'll get the car in the air soon for the oil change, etc (I have a storage lift so it makes it easy) and do just that. I'll pull the whole sump plate and post pics back here.
PS- Glad to see you are local-ish as well, I'm pretty sure we've connected in the past over some Pcar bits for sale!
Cheers-
Brian

[Mark Salvetti]

Hi Brian. Yes, I think we did talk about parts, but I can't remember what or when. I'm kind of useless, I have a pile of parts but no time. I hate it, walking by the car in the garage every day and not being able to work on it. It has been dormant for 20 years now.

These threads show what your screen probably looks like:
SC oil pump screen and wha is this?
Sump screen and plate

Here is a photo I borrowed from the first thread. That dimple should be right above your drain plug:



Mark

[b. hilliard]

Awesome Mark, thank you kindly. I'll definitely have to pull it all apart and check, but I'm guessing that will be what mine looks like too. Why it had the bowl shaped sump plate with no drain plug when I bought the car is anyone's' guess...but there's only one way to find out. I have a bunch of little projects to get out of the way before I can explore, but won't drive the car before the first spring oil change so it can't be too long!
Sorry to hear your car is dormant, wish I could help. I thought looking at them all winter was agonizing!