Does the 901.10 engine need a special pressure plate with new clutch?

[H.G.P.]

Were all 901.10x.xxx.xx engines S engines? If so, does this need a special pressure plate in the event of a new clutch?






69 911 "Little Bull"

[H.G.P.]

I was looking through the pressure plates here at Pelican (parts), and noticed an "S" plate. Interested in the difference (material?, wieght?, etc.,?), and if it is necessary due to the torque created by 901.1xx.xxx.xx engines?





69 911 "Little Bull"

[Early_S_Man]

The engine type number '901/10' that you will find stamped to the right of the alternator support on some early engines DOESN'T have all the extra digits and decimals to make it look like a typical part number! So, if you are looking at one of the casting numbers, such as on the alternator/fan housing that ends in 'R' ... for raw casting ... it doesn't have anything to do with the engine type, and it isn't a part number you can look up!

[H.G.P.]

Thanks Warren. There are 11 digits stamped on the engine itself (underneath the car) That one ends in the "R". (starts with 901.10 etc.,) The alternator "band" on the lower right has seven digits coresponding to the 911 S in the Porsche 911 Red Book, that one does not end in "R". There is decal label on the top of the alternator that has the 30 degree and the cc(s).




69 911 "Little Bull"

[emcon5]

901/10 would be the correct engine type for a 69S though, from PET it looks like a "T" could have a 901/03, 901/13, 901/16 or 901/19 and a 911E could have a 901/9 or 901/11. The different numbers for US/euro and 901/sportomatic.

If you can't find the type number, post the first 4 numbers of the engine S/N and I or someone else will look it up for you. The number for a 69S should start with 6398.

Tom

[Early_S_Man]

It sounds like you didn't find the engine type number ... it is stamped on a horizontal milled rib to the right of, and below the serial number.

Back to your original questions ... yes, all 901/19 engines were 'S' engines -- the first of the MFI 'S' engines, and the peakiest of all 911 production engines! And, yes, a special bronze-faced pressure plate was used ONLY on the '69 911S engine.

[H.G.P.]

Correction.....I went out to the car, I misread the lower right digit (lower right of alternator..should be digit no. "2"). I read it off the thin narrow vertical "rib".

The label on the top has the 30 degree etc., with the 911 S and the 911 E and ccs etc.,

So the 901.10 that ends in "R" on the side of the engine block shall I assume not significant?

And when the time (hopefully not soon) comes to replace the clutch, I can use the old part as reference.

Thanks.



69 911 "Little Bull"

[emcon5]

That raises an interesting question.

According to Bruce Anderson, Porsche only used the bronze-faced PP for one year because it was "too fragile to provide adequate service life in street car applications." Can the bronze faced parts be replaced with the standard ones? The fact that standard one costs 1/3 as much as the special one would be an added bonus.

Just curious,

Tom

[H.G.P.]

Follow-up: The Red Book reads (901/xx) as cooresponding to the engines, page 19. Is this number found anywhere on the car other than ending in 'R"?



69 911 "Little Bull"