Looking for info on a 2.2S oil thermostat

[Alan.UK]

Hi,

I remember once reading on a web site that there were two slightly different types of 2.2 S oil set ups (in the engine bay). It may have even been down to two different types of material used. Can anyone confirm this or point me in the right direction?

Has anyone seen a complete unit i.e. from tank to the hard oil lines, sell recently? I am looking for an indication of what a setup like this is worth?

Thanks

Alan.UK

[Alan.UK]

Here is a pic

[Grady Clay]

Alan,

For the early series ’65-’89, there four distinctly different front cooler plumbing systems for production cars.

First is the ’69-’71 911S, illustrated above. The thermostat and pressure relief valve were in the engine compartment at the oil filter console and filler neck. Another feature was this system used 20 mm pipes inside the rocker panels. Of course it had the full radiator up front.

The ’72 system was unique with the oil tank mounted ahead of the RR wheel. The thermostat and pressure relief valve was integral to the oil filter console. This was the first year for 25 mm pipes and hoses. The pipes to the front were now bolted outside the rocker panels. This retained the full radiator but with larger fittings.

In ’73 there was again a unique system. The thermostat/pressure relief valve was hung off the return oil fitting to the oil tank. The front “cooler” was now just a piece of pipe (trombone). The oil tank was repositioned beck to previous behind the RR wheel. From this point on, the tank stayed the same – sorta.

The good news was the ’72 cooler was an easy replacement with two hoses, some hardware and the cooler. That is probably why the ’72 cooler is in constantly short supply – I think it fits everything to ’89. The problem it is fragile and short lived.

The ’74 model pretty much stabilized things. I think this was the first year where a front cooler was on the option list. Prior, you had t be "in the know." The systems ’74-’89 are all very similar.

The current best Factory cooler is the ’88-’89 Carrera cooler with an electric fan. Of course there are great aftermarket replacements and options.

During all these years there were also Factory race parts available. The ’69-’71 racers had two coolers in the front fenders. The ’73 RSR had the big center cooler. The ’74 911RSR originally had front cooler 908.107.043.02. The late 935s had the huge 917/30 center cooler.

It would be fun to document what Porsche specified for all of the race 911s but in reality they were all undersized. Most racers (and the Factory) immediately made them larger.


There is a lot of important engineering that goes into a successful dry sump oil system. Every single little detail is of serious concern. Porsche did it right – most of the time. The very few gaffs need to be addressed if you are pushing the limit. All the production stuff works better than any other automobile.

The absolute best dry sump oil system is on the GT3.

Best,
Grady

[Alan.UK]

Thanks for the overview Grady, that's a very useful summary.

Do you know anything about the two different material types used for the 69-71 set up? I am sure I read something, somewhere about it.

Thanks again

Alan

[andrew15]

I'm almost 100% sure:

Aluminum for stock production
Magnesium for racing models

The last time I saw an aluminum one sell it was in the neighborhood of $450 - about 6 mos ago.

I'm pretty sure Armando on this board scored a magnesium one for around the same price a few years ago...

Regards,
Andrew M

[galluspoligny]

Hi,

I'm loocking for buy one for my 2.2s of 1971, like the picture.
Please contact me if you have it.

Regards

GALLUS