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-   -   1972 aluminium engine case. how can this be??? (http://forums.pelicanparts.com/911-engine-rebuilding-forum/840874-1972-aluminium-engine-case-how-can.html)

MaRu 12-01-2014 08:58 AM

1972 aluminium engine case. how can this be???
 
Hi guys,

I have had an engine sitting in my garage for a while. Now I needed the crankshaft out of it and was a little surprised of the case material. Regarding the case numbers it is a 1972 engine. I think it is a 2,4T. At least this is what the heads, shrould, carbs,... are from. It was opend/overhauld somewhere in the past. But please have a look at the pictures. This doesn´t look like magnesion, or what do you think?

Many thanks, regards

Malte

http://forums.pelicanparts.com/uploa...1417456638.jpg
http://forums.pelicanparts.com/uploa...1417456684.jpg
http://forums.pelicanparts.com/uploa...1417456714.jpg

Steve@Rennsport 12-01-2014 09:18 AM

It does look like aluminum.

Porsche did make a few 7R cases in aluminum for the 2.8 & 3.0 RSR engines so I'd look at the casting numbers on the sides (just below the oil return tubes) to see what those are.

Whats the engine's serial numbers & type numbers?

MaRu 12-01-2014 09:45 AM

Thank you Steve.

The serial number fits to a 2,4 T 6120605
The type number was very light,After cleaning it with very little sanding it was nearly gone. It was 911/51. Maybe it was a factory replacement.
The strange thing is that these are the casting numbers: 901.101.101.4R 901.101.102.3R
But like you said, it looks like aluminium...

tom1394racing 12-01-2014 03:33 PM

Magnesium will shine like Aluminum when the surface oxide is removed by sanding or blasting.

Looks like a Mag case to me.

cgarr 12-01-2014 03:55 PM

Same case I'm working on right now but slightly newer. A file over a small spot and if it sounds brittle is mag.

http://tapatalk.imageshack.com/v2/14...923ce0dd2e.jpg

MaRu 12-01-2014 09:25 PM

Many thanks, I guess I was a little euphoric. ;)


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