This is also a great hose to use. I used it and several others have also.

While your in there at the very least check the connections on the temp sensor. Many (me included) have had to re-attach these wires. There is a write up on this somewhere here.

http://www.oldcarstuff.com/catalog/index.php?cPath=50

 

Ah, I was browsing through the WSM the other day and came across the pic and thought it might come in handy. When I installed my hose the end attached to the splash shield was still attached, but the rest of the hose had been ripped off. I went to a place here in town called Rubber and Hose Supply and picked out a hose that will definitely stand the test of time. (about $8 I think) I attached one end to the shroud and the other end I attached to the already existing hose. It actually worked pretty slick. But I agree, it's definitely a weird design!

 

Not meaning to fully display my ignorance here, but, what's a "WSM?" lol

Spent hours making space in the garage, and washing the car. Just stage one - need to go over parts with tar remover & etc. With any luck, I'll have it in a tidy, clean work area in a day or two. Looking forward to fixing these issues...









Nick - 89S4

 

WSM = Work Shop Manual

 

Durp... Sorry... Thanks...

 

Is this sensor the same one that shows the outside temperature on the digital dash?

 

You know it. This is what mine looked like when I removed it, just awful. FWIW I replaced mine with the factory hose installed in the WSM-pictured method. While more expensive than a Home Depot special, it's really not that expensive in the grand scheme of things. And I didn't have any trouble attaching it to the splash shield.

 

The temp sensor in the alternator cooling hose is for the temp control on the HVAC.

The temp sensor for the digital dash on later cars is in the bottom of the driver's rear view mirror housing.

 

Wally's talking about the bottom of the drivers side door mirror (in case of confusion).

Alan

 

Aaaaaaaaaaah. Didn't know that. My heat's been stuck on since I got the car. Maybe I lucked out and this alternator sensor is the cause...

So, if you get the "aero" mirrors, do they have the temp sensor?

While I'm on the subject, can my 1989 car be somehow retrofitted to have the tire pressure sensors too? What about the code output - I heard it was available on a digital dash, starting 1990. Doable???





Nick - 89S4

 

Aeros are wired the same as your mirrors (except connectors) and have the same ext (dash) temp sensor.

The Porsche RDK is not worth having - it would not be practcal to add anyway -however better aftermarket systems are available and you can fit these..

I have a smartire system (I also have RDK) the Smartire its is very good - programmable alert levels and real time readouts of actual pressure and
temperature per tire as well as dual level warnings & emergency alerts (pressure & temperature) and delta to programmed alert level per tire.

If you mean diagnostics it is limited on earlier S4 models - with upgraged ECU's you can get more features...

Alan

 

Can an upgraded ECU do as much as just buying a code reading device, or using that cable & software that I read about?

What's so bad about the Porsche tire pressure system anyway? I don't doubt that others may do more, but I'd like to avoid anything additional inside. I understand the porsche one just displayed on the digital dash? I assume yours is another box or part installed in the car somewhere???






Nick - 89S4

 

What is so bad? - just about everything....it was a very advanced system at the time - but today looks lame. It requires special wheels with sensor fittings - Porsche only. Each wheel needs 2 sensors - they are NLA as I understand but were about $600 each as replacements. You need pickups (Porsche only) wired to each wheel & back to the cabin. You need a Digi-Dash to display the warnings (early ones don't have this feature). You need the controller unit - expensive. Lots of work...

What do you get - fixed tire pressures at 36PSI (there is one other option (32PSI?) for sensors but they are fixed once installed). The pressure setting is supposed to be temperature compensated but they don't check for temperature otherwise. There is no pressure indication only an alert by wheel when below pressure. They are notiorious for false alarms and I'd venture that more than 50% of cars so equipped have the system disabled... Since many folks run aftermarket wheels their RDK is non-operable - but even with stock wheels and aftermarket tires the RDK pressure settings are often all wrong...

So all in all its really not worth having...

Alan

 

Yep. Sounds like they definitely suck then. Oh well...

Thanks so much for the info though. Most appreciated. All the best... : )





Nick - 89S4

 

....., interesting post, can anyone confirm for me, does the 1980 928 S have this cooling hose fitted..., mine does,nt seem to have one..., and also no hose adaptor/fitting on the back of the alternator either, although I do have the air-con temp sensor installed in the brake duct/vent.

Ken
80 928 S
5 Speed

UK