1977-1989 Porsche 928 Oil Pan Gasket P/N 928-101-207-00 For Touring, 928, 928S, SK, S4, SE & Club Sport models.

This is a hand made product of modern composite cork and rubber material, 3/32" thickness. I have precision made these for years using razor and punch and now offer them to you. It's far superior to NOS cork. Gasket stays pliable and takes the heat very well. Fits like a glove and seals tight. Changing fluid does not remove the crud that collects in the pan. Extend the life of your drive train with a cleaning. I have other antique pan gaskets on EBay now.

My website http://www.UltramaticDynamics . Checks, MO, or Paypal for immediate shipping. Email me if you want to "Buy it Now". Buyer to pay additional $2 shipping. Virginia Residents add 4.5% sales tax.



Thanks for the advice. It appears from everything I have researched out that Hylomar is equivalent to Yamabond with the added advantage of being made, like our cars, in Germany.

So a couple of questions?

Do you still use the cork gasket? I found it was impossible to get the torque Walt suggested of 6 to 8 ft. lbs. without crushing the gasket. Instead, I walked around the gasket until the bolts were tight and did not abnormally crush the gasket.

How much is too much. I put two small beads on the crankcase set the gasket on and then put two small beads on the pan one on either side of the bolt holes. Before I cleaned all of the surfaces and the bolts and bolt holes.
I used blue Loctite on the bolts.

When finished I had some of the Hylomar squeeze out to the side of the gasket. Today it was dry and easily picked off. Is this too much? What problems have you seen from using too much Yamabond?

Thanks much.

Dan the Pod Guy
Portia's Parts

Use Yamabond, Locktite or Wurth crankcase sealer, I forgot the numbers, and spread it on evenly, and very thin on the mating surfaces. This way you control the spread of the material

Beads of silicone have been known to go through the oil pump and get lodged in the heads oil passages.

Yamabond is my choice for sealant.



I've been using Hondabond (same as Yamabond, even looks the same) for three years now. I used it when I rebuilt my '83 Euro S motor and transmission. Last year I used it when I replaced the rod bearings on my GTS. I spread a LIGHT coat of it on the appropriate gasket for the part I was working on and then coated the bolts. If you try and torque the oil pan down (for instance) right away using Yamabond or Hondabond on the gasket, the material will act as a lubricant and the gasket may squish out in some places causing a leak. What I've done with the oil pan and the cork gasket is to carefully clean the mating surfaces first to remove all grease and oil, lightly coat each side of the gasket with Hondabond, snug up the bolts just to the point where the parts and the gasket make solid contact, and allow several hours for the gasket to set.
Then go back and torque the bolts to their specified value. Three years, three Open Road Racing events, and about 5,000 miles later, not a hint of a leak.

Just a picture of the Oil pan (oilpan)

General consensus is NOT to use any bonding or sealant when using a cork gasket!


I'm going to be installing a rubber cork composite pan gasket weekend after this. Got it here:


89 S4


silicone gasket from "RealGaskets.com"  https://realgaskets.com/product/oil-pan-gasket-12/

From their website:

Oil Pan Gasket – Silicone

fits Porsche 928

– Our silicone rubber gaskets are made from aerospace mechanical grade AMS silicone and designed to withstand temperatures up to 400 degrees Fahrenheit.
– Therefore, they will not break down and deform or crack up like cork or neoprene.
– Our gaskets seal uneven and warped surfaces, and eliminate corrosion.
– Gaskets are 100% reusable.

Years: 1979 – 1995

Part #: RG-928-101-207-00

Old part #: RG-928-POP
Corresponding Part #’s: OEM# 928-101-207-00-M17; RG-928-POP
Quantity: One silicone gasket
Gasket thickness: 1/8″ thick.

Wash the cover and mating surface with solvent.

Remove all traces of oil.
The gasket must be installed DRY.
Do not use OIL or LUBE of any type.
Torque: 20 to 25 INCH POUNDSThis is just 2,6 - 2,8Nm.
If the gaskets bulges or “pooches” out then you are over tightening – back off a little on the torque.

Wash the gasket briefly in hot soapy water.
Rinse well & dry all surfaces thoroughly.
Re-install following the above installation instructions.



928sRus sell this seal:


It is a aramid fiber reinforced with a nitrile binder and takes 7Nm to torque up. So much easier to install compared to silicone seals that have just 2,5Nm torque to avoid any compression.