Sporto conversion

[Classic]

The PO converted to a 901 5 speed in the past and I'm cleaning up the conversion, whilst i have the engine out.

The engine currently has the Sporto oil pump fitted to the left cam housing, with the lines just crimped off, you can picture the oil leaks now!

Is there a housing or blank that can be fitted to the left cam housing, where the oil pump currently is?

I can't identify it in PET.

[Grady Clay]

" "
(C) Dr. Ing. h.c. F. Porsche A.G.

The #16 part is called a “Cover” Verschlubdeckel P/N 901.105.161.01.
It should be easy to find in a used cam housing. It is a stamped
steel part. You should install it with some sealant to the aluminum
housing. You will need to remove the two pins in the end of the cam.
Try and find the non-Sporto piece of tin for cylinder #3 also.

Do I see the cylinder baffles installed upside down?
Has the clutch release bearing worn the fingers of the pressure plate?
What is the condition of you Marelli distributor?

With some cleaning and painting the engine will be very presentable.

I’ll pretend to not notice the wheel in the background. Hehe


Best,
Grady

[Bobboloo]

Good eye Grady. I wonder if the cylinders suffered any damage from the inadequate cooling.

[ChrisBennet]

That cover is available from our host for a little over $7.
-Chris

[Zeke]

Originally posted by Grady Clay


Do I see the cylinder baffles installed upside down?
Has the clutch release bearing worn the fingers of the pressure plate?
What is the condition of you Marelli distributor?




Best,
Grady

Wow. Who's good?

[Classic]

Thanks guys and wow, to answer your questions

1. I'll check the baffles out. looks like i might be up for removing the cam housing.

2.The fingers of the pressure plate are covered with oil and good old Australian red dust, like every nook and cranny.

3. The Marelli's good thanks, especially when i put the new Bosh in.

[Grady Clay]

I’ll bet some PO had the engine apart and found the cylinder baffles “left over” after the heat exchangers and oil return tubes were installed. Being too lazy to take things back off, he simply put them on upside down. What do you think?

I think you can install the baffles correctly by removing the exhaust and oil return tubes. You will need to remove the oil pipe and fitting below #3 cylinder. It will probably take some “coaxing.” Use new collapsible oil return tubes and O-rings available from our host. This might be a good opportunity to replace exhaust studs.

No, you do not have to remove the cam housing. Take the oil cooler off (you want to clean it and install new seals anyway) and inspect the cam cover on the 4-5-6 bank. It simply presses in from the outside, flush to the end of the housing. Yes, to remove a cover the cam must be out of the housing.

The two Sportomatic oil pump drive pins in the end of the 1-2-3 cam simply pull out with ViceGrip pliers. Inspect the bore where the cover seals for any prior damage. Make yourself an install tool for the cover. Hardwood works just fine. Use sealant VERY sparingly, you don’t want any excess to get to the cam bearing.


What kind of oil is on the pressure plate – engine or transmission? What does the disc look like?

Your T will like the Bosch better. So will your pocket book for service parts.

Find someone intending to keep a 905 Sportomatic in service and donate all your excess parts to the cause. The check valves at the intake manifolds and the control servo are useful but so may be an oil pump.

Best,
Grady

[Classic]

Thanks Grady, Yeah I've got an entire new exhaust system for the car, including new studs.

I wasn't thinking of changing the oil return tubes, but i think it will be a good idea now, after your comments and looking at the factory manuals, i need to fix those baffles.

I've got all new seals for the oil cooler to go on.

The pressure plate looks good I'll clean it up, it's covered with baked on dust, this stuff sticks like s#$t to a blanket!

It looks like the top of the breather has been leaking. The top of the engine had at least an inch of (mud) all over it. (new gasket in hand)

The good news is that the oil leaking from the sporto pump covered the tranny and the underside of the car from the rear seat wells back, so no rust.

When i had the PP done the leak down came out good so the engine is strong, just needs a little help as per the entire car.

[Classic]

Another view of what i've got to work with

I'll have to get the tools (crow foot etc) and do some reading before i attempt to remove the cams.

[Bobboloo]

Be sure and heat the exhaust nuts with a torch to cherry red before you try to remove them. The head studs break very easily.