Sab

I took my oil pan off the '82 euro to address an oil leak.
amazed that the pan looks completely clean, just like new inside.

I have some questions.
First the pickup assembly got somewhat disloged upon removal and I am not entirely sure how it goes back together. Does anyone have some pictures how that rubber boot holds down the screen?

And then, what parts do I replace while I have it apart. the upper gasket on the oil pickup tube I guess, what else?

thanks,
cheers

Dave928S

Here are some pics as it comes apart. The boot is just a push fit through the screen and down into the base baffle assembly. Simple as that ... just plugs in the hole. Just dismantle everything and clean it all up ... reassemble as you see in the pics and bolt the sump back on. As long as the boot is still in good shape, you should only have to replace the pickup tube gasket. The boot pushes down into the baffle bowl and wedges the screen down so that its trapped between the boot and the baffle bowl. That's probably as clear as mud .. but it's a bit difficult to explain how it wedges the screen in to the bowl (black) that you see in the first two pics.

jeff spahn

So, I have never seen the inside of an 82 or a Euro oil pan. Why is it so different than my 90's oil pan?

Dave928S

Note the four baffles ... with the pickup bowl going down to a pickup suction spreader at the bottom ... topped off with the pickup screen. Pretty good design for minimizing surge, swirl and ensuring oil pickup is spread over a large area at the bottom to reduce the chance of a vortex and air entrainment. Its no wonder this design is regarded as good for the track IMHO. Beats me why they didn't retain the design or build on it... cost maybe??

Maybe someone else knows the story of the sump/pickup design evolution.

Does someone have a pic of a later sump to post for comparison?

GlenL

Excellent question.

Some guys retrofit the "cloverleaf" to later cars.

I put an S4 pickup on my Euro. Why? For the screen, baby.

Sab

great, thanks. The rubber boot on my setup was somehow under the screen, or at least half way. So when trying to remove the pan it didn't come apart easily as it was stuck in the screen.
But that seems pretty straight forward.

Jim M.

Here is a GTS pan with the GTS baffel. The only difference between this and the S4 pan is the baffel.

IcemanG17

why was this excellent oil pan removed from 928's....cost is the only answer....& just like how they also removed 1 circlip from the front of the TT to save money shortly after they changed the oil pan...what was the result...they saved a few bucks....we BLOW engines later.....

The early oil pan is by far the best non dry sump oil pan available for 928 engines...the S4 style design even with the GTS baffle flat sucks.....its like putting a bandaid on a gunshot wound.... Yes scrapers & accusumps help....but they work even better witn the early pan.... A large part of the problem 928's have is oil being whipped by the crank and turned to foam....the mesh screen helps eliminate that & the cloverleaf design futher helps provide the pump with a supply of non aerated oil

Fogey1

Anybody know the years of the old-style sump? '83's?

Dave928S

I think MY82 is probably the last year ... PET shows no cloverleaf in 83 ... but then they also don't show the screen in MY82 or any other earlier ones. Mine is July 82 production. Maybe one of the suppliers knows. It'd be interesting to also know if the early sump parts are still available, and what drilling and tapping is necessary to adapt them to newer ones.

GlenL

I'm going to resist a long dissertation on this.

I don't believe Porsche cost-reduced anything on this vehicle, ever!

I'm not convinced the old-style sump was better. There's no screen on the pick-up for catching bits. If the rubber part loses seal then it's more likely to suck air. The cloverleaf edges get exposed to air on hard acceleration. The actual pick-up is higher off the bottom which isn't good.

I've gone with the I-J windage system and new pick-up. Now that's the better system.

And I did resist.

terry gt

Sometimes you have to look at the big picture to understand the enginering . The early 928s were intended to replace the 911 ,and go racing , so hence the better oiling system on the early cars . On my stroker I have used an engine brace/spacer and a early pan set up .

Stromius

So will a <83 oil pan fit the remaining years? IE could I retrofit a 82 pan on an 88 for instance? Will a new pickup need to be fitted?

Dave928S

I'll resist a long dissertation too Glen ... but I'll make a few comments.

I still think that, of the stock systems, this is the best one. Obviously carefully configured more involved aftermarket systems can do better.

The screen acts as a filter to catch bits well before the pickup and is likely to help with entrained air removal.

Any pickup can be starved of oil with high G forces, but I think a cloverleaf is less likely to starve because it spreads the suction and flow over a greater area and minimises the possibility of vortex formation. Even if you lose oil cover in one area, the level will be higher in another quadrant and make up for it with low velocity flooding through to the pickup point. This principle is widely used in all sorts of other pumping applications to avoid vortex formation, aid initial priming, and allow normal operation even when pick up well levels are low.

The prospect of the rubber boot leaking or losing its seal isn't a valid reason to discount this system, because there's no evidence that it does or should when in good condition. Its the same as saying the pickup is no good because the gasket could leak.

Sorry .. I lied ... that was a mini dissertation.

Landseer

Here's an 84 for comparison / completeness: