Windshield Washer Pipework

[mrleemarshall]

Can anyone advise where this part joins to or is on a 1989 930? It is the breather pipe.

On early models i believe it connects to a breather hole underneath the gas filler flap. Picture attached of an early model.

On my car, which i think has had some work done, it is just flapping about. It is not connected nor is there anywhere to connect it to. It also has no end on it.

[rs6er]

Just a guess, but maybe it was for a rear wiper, if so equipped.


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[PeteKz]

I don't know about the 89 930 specifically, but another hose that size in the frunk is the master cylinder overflow drain. See if that might be it.

Late edit: As EC900 pointed out, I meant the brake reservoir, not master cylinder.

[EC900]

+1 on the brake reservoir overflow hose, it would be exposed by the washer tank in wheel well. It would be a rubber braided 4mm that connects to the res. and then to a hard solid plastic line along fender in trunk, connects back to the clear section vinyl hose that gets held in place with a folding tab next to washer tank towards the ground. One thing for certain make sure that brake fluid res. hose has a path to the pavement, there could be fluid in that braided section of hose that will spill inside the trunk.

As for where the “vent hose” connection, I don’t recall seeing one when I removed my old yellow hardened and clogged lines.

[midyearallyear]

I have a new to me '74 911 and when I picked it up, the guy at the dealer (a classic Porsche repair/dealer at that) told me the little port next to the gas filler is a vent for the gas tank, and that he never used it. However, the manual says that is the wiper fluid port. Also, I nosed around and it certainly appears that the line makes its way into the left wheel well into what I have to assume is the wiper fluid tank.

Normally I would just go with what appears to be the absolute most obvious, and fill it up and see if the wiper unit sprays (currently it does not, but it might also be just empty). But after the comment about the fuel vent from a guy who runs a repair facility, I thought I better make absolutely sure. I mean, if it is NOT the wiper fluid port, then I surely have not been able to locate one otherwise.

Am I crazy? Perhaps, but just in case... I do not want to add water to the gas tank if I am somehow wrong.

[midyearallyear]

For extra credit, anyone know what might have gone here? This is the driver side, inside the aft part of the front wheel well. There are two clamps, but no clue what might have resided here at one time.

[dlagerstrom]

On my '82, aft in the front wheel well was the A/C dryer.

[EC900]

@midyearallyear - yes, the small plastic cap is for washer fluid.

The two bands in fender well are there to hold an overflow hose that you’re missing. It connects underneath.
Under the gas cap flap you will notice a small hole for any washer fluid, rainwater or gasoline etc. overflow. Periodically keep the drain clean.

As for wiper pump not operating first make sure it’s connected. Insure it’s getting power, set up a couple lines and a water bottle to test function of pump. I was able to clean and rebuild my pump. Secondly it’s likely the T-connectors/ check valves and/or spray nozzles are clogged.

True, late model SC with factory ac had a dryer mounted inside left fender.

[midyearallyear]

@EC900 - brilliant call. The pump itself works great, and after I kluged in two temp lines of tubing in two glasses of water, it moved the water from one to the other really quickly.

Time to chase/replace tubing running throughout the car. I blew through the tubing and as predicted, it is clogged. Also, the line that comes from the fluid tank is open and free, though does not pull any water at all, so that needs some attention too.

[EC900]

Good it worked out.
This may be the reason for your other Post about ‘gas fumes’. An overfill or spillage occurred and what you smelled was a splash of gasoline slowly evaporating from the fender well. It’s a good idea to check the filler neck connection hose too, they can also deteriorate too.

The washer hoses is just tedious endeavor very tough to remove the hose from the nozzles, don’t try to remove nozzles, it’s not necessary. But use a hair dryer or very low heat to warm up the hoses and they’ll slip off easier. A mirror and cellphone cam help seeing under the cowl. Oh - mark those hoses before taking them off, remove and replace only one at a time. I added an extra 6” length of hose from the nozzle to the new check valves and T so it will be easier to remove after another 40 years.

[spuggy]

Originally Posted by EC900

The washer hoses is just tedious endeavor very tough to remove the hose from the nozzles

Yeh, if the hoses are hard, slit length-ways with a razor to get them off the barbs - new hose is soft and pliable - even more so if ends dipped in hot water (can be useful in cold weather).

50 year old hose? Not so much.

Originally Posted by EC900

don’t try to remove nozzles, it’s not necessary.

Unless they're clogged of course, which is pretty likely. Same for the check valves.

Cut the old hose and see if you can blow through them. Be grateful, if they're clogged, that the unheated middie/SC washer jets are so much cheaper than the heated 3.2 ones

Fun fact; the washer jets are a little ball in a socket - can be aimed exactly where you want them with a pin. I can't be the only one who never knew that...