early '72 oil line oddity

[beech33pilot]

I've owned the car (9112100163 build date 7/71) since May of 1982. It had 66k miles when acquired. It is very original with exception of a extensive engine rebuild/upgrade in 1987. I am now restoring the body and doing a reseal/refresh on the engine.

Knowing that this is a very early 1972 911T, I'm not surprised that the engine to oil filter console hose appears to be a prototype assembly. I was interested to know if any other early examples still have this odd hose? Or maybe not odd but certainly not depicted in the IPM.

The hose is (and was) a cloth braided hose with an aluminum 90 degree fitting on each end. This fitting is of the field installable type that compresses the hose, not the typical crimp type that the factory used. Total length 68 inches (1727 mm). I say was because in 1995 it started leaking due to the nut at the oil filter console splitting. At the time, the company where I worked had good fab resources and I had the shop fab a stronger nut, cut the 90 degree fitting to get the nut back on and then weld the fitting back together The hose was weeping so it was replaced with Aeroquip 1503-16. The aluminum fittings were un-obtainable. It has been leak free since.

Now the oddity - the hose is routed OVER the 915 bell housing and secured with 3 Adel clamps, not under the trany as the assembly 91110772011 is shown in the parts diagrams. I assume that routing over was how the 71 and earlier were done but with a shorter hose due to the oil tank relocation for 1972 only.

Anyone else have this arrangement or have they all been replaced with the 91110772011?

[Simonjjb]

This is my 1971

[Brad Davis]

All of the 72 scavenge oil lines that I have seen were steel or aluminum tubing that went under the transmission bell housing. The tube connected to a soft line via the TCH aluminum collar fittings you have, then up too the thermostat. The soft line over the transmission approach is also factory. Used on 65-71. In late 68 and 1969 the tube under the transmission appeared for a bit. Have not seen it on 70/71.

Is your 72 an early year production car?

Best regards,

Brad

[beech33pilot]

Yes Brad, very early. built 7/71

[myflat6]

Brad, you redid my oil line for my early '72 (7/71 build as well) and it was just like these examples above (although not cloth). I recall you saying that you hadn't seen that before. Seems like they transitioned to the later style at some point later in the production dates. My early '72 has other '71 model year carryovers.

[raspritz]

I've owned the car (9112100163 build date 7/71) since May of 1982. It had 66k miles when acquired. It is very original with exception of a extensive engine rebuild/upgrade in 1987.

I am curious what makes you believe this hose and arrangement is original to the car and a 'prototype'? FWIW, the hose in my '69T (2/3/69 build) runs over the bell housing.

[Brad Davis]

Hi Bill,

That's right, now I remember. I am guessing the early cars used an initial version then they went to the hard line. Or maybe the T got a soft line over the transmission. Would be interesting to hear from any other 72T owners. In 68/69 the same thing happened, some hard the hard line hoop and some the soft line over the top.

I think Beach33 may have thought the TCH fittings were out of the ordinary. Many are accustomed to seeing crimped lines these days, in reality all of the cars from mid 68 - 72 came with TCH aluminum serviceable fittings. Most cars no longer have their original TCH and replacement crimped lines are used. IMHO original lines add a huge plus to the look and soul of the car.

[Richy]

Simonjjb , since non of the hardware , a wrong bracket and an unusual mag finish on the trans in your picture , why would we believe the hose to be correct ?

[Simonjjb]

Simonjjb , since non of the hardware , a wrong bracket and an unusual mag finish on the trans in your picture , why would we believe the hose to be correct ?

I did not state that all was original - I was purely showing the hose location - which is correct. The hose was purchased from Porsche - at least it’s current iteration. The case was not finished - except for wiping down with Gibbs.

Here was original before restoration - very early 71

[BOYER73S]

Later 72T MFI USA car, metal line over the back