Eric_Oz_S2

I'm after the rear half of the magnesium casting that cover the camshaft drive pulley. It is PET part number 94410517908 / 09. Must have threads in useable condition.

Grandpa#3

A friend needed one, DC Automotive had a used one a couple weeks ago for $500.00. He called Sunset and got a brand new one for $700.00 and some change. Outside of that they are as scarse as hens teeth.

Cheers,Larry

potent951turbo

I have a couple of spares and might let one go if your still looking.

I also have a brand new one but that's being kept for a rainy day.

MB968

Just over a year ago I looked for one of these and couldn't find one anywhere. If you do find a used one, just make sure it has no signs of the mushrooming of the post that comes with its corrosion. I finally bought one from Sunset; retail was almost $1200, bought it for the discounted rate of $954. At that time there were only a couple left in Porsche's inventory. If they now have them for $700, sounds like a good deal. Maybe you can make a sweet deal with Colin for one.

RajDatta

Jeez, for that much, I would think one could get a batch mode for a lot less, wow!

kwikt

I bought a used one last summer for around $150 for both covers. They are out there guys!!!!!

Eric_Oz_S2

I have found one. Yes they are out there - 3 offers so far. MB968 - you must have been unlucky at the time. $954 ouch!

MB968

Yep that was just months after I purchased the car. I wasn't pleased to be dropping that kind of money for just one simple part. If I'd been tapped into these forums better at that point maybe I could have found one from someone here. But at this point its water over the dam.

dougs968

Eric, don't pitch your old one. It can probably be repaired. I rebuilt mine, functionally as good as new. No pics, but I wrote about the process here a couple years ago. Titanium Devcon to construct a new post to machine and Magcoat to reprime the bare magnesium after blasting off all the old paint. Dupont Variprime the magcoat and repaint black. Easier said than done, but mine look like new.

Doug

Eric_Oz_S2

Doug

Good idea. How much would you think a repair would cost though? One of my posts is split severely with the deformed section only a mm away from the pulley now. The other post is cracked across the post about halfway through. Perhaps I shoud paint both sides of the new to me cover to prevent further issues?

tamathumper

This part appears to be acting as the "sacrificial anode" - based on just about everyone's falling apart, especially those in the NorthEast where salt is used on the roads (anecdotally). I wonder if there's a way to add an actual anode on or near this thing that would keep it from deteriorating?

North Coast Cab

I have one too if anyone is interested. Just parted a 968 motor I had and am only keeping a few bits that I wanted. Let me know if you need anything else.

dougs968

Strange thing about magnesium, my covers were warped a little out of shape due to the lower right post on back cover corroding in half and "growing". After I milled all of the affected post flush with the cover and re-machined a new post and screwed it back together, it kind of stress relieved itself back into shape.

As far as cost, it kind of depends. Titanium Devcon is about $100 a pound. Good stuff but you could probably use an aluminum or steel based epoxy putty for a lot less and get good results. The Magcoat if I remember is/was about $90 a gallon. You need very little to treat the bare magnesium. Magcoat is some pretty nasty stuff, health wise, to work with. Nitric acid and Chromium something. Maybe find a local A&P guy to do that since its used mostly in the aviation industry now. I'm a machinist with equipment and access to more, so it's just my own time spent on another project.

Doug

MB968

Wondered about something like this myself, but not the area of the science world that I'm experienced in. My car was always on the West coast, but I guess it could still have been an issue from salt water?? It was in Calif. the majority of its life, then Vancouver BC.

Also, could the high voltage environment of the distributor be a contributing factor; ground paths through the dist. cap? Should we be on a shorter replacement life cycle to avoid any potential here?

And, why always the boss that is on the right looking at the front of the engine. At least the two that I"ve seen have both had the corrosion on the right hand boss with the left boss looking very good. Made me wonder if the right boss could have been the one in the casting process that collected more of the junk from the casting process; was the sprew on this end?

I believe my new part is aluminum which hopefully will avoid the issue.

tamathumper

Are the right and left bosses touching different metals?