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I've researched this topic, and I can't find any data regarding proper part/assembly installation anywhere.

 

When I purchased my car, I found both wiper-arms thrown into the backseat, and evidence that the Wiper motor mechanism was once removed from the car - a grounding wire was un-attached to anything, and A-L-L of the mounting hardware had disappeared.  No nuts, no grommets, nothing.

 

Looking at the 968 Parts manual, I noted an upper and lower rubber grommet assembly, a large washer, a large jam-nut, followed by a grommet of some kind, followed by the wiper arm, and then a small wave-washer followed by a smaller nut and then a plastic cap.

 

Somewhere in this list, the plastic airbox-cover shroud is laid over the firewall, wiper-arm mounting posts poking through the aligned holes, and the cover is hard-mounted to the firewall under the windshield with double-sided 3M mounting tape.  

 

I've collected the parts-list, and procured everything from my local Porsche dealership that was currently available from the 'global' Factory parts inventory.  The jam-nuts are NLA - I found a used set via eBay, as your standard jam-nut via other online vendors isn't "thin" enough for this application - more on that later.

 

This assembly of parts WILL NOT FIT.....either I have the combinations of installation incorrect, or the parts have 'changed' over time, or something.  I'm at a loss as to how to proceed.  The rubber grommets (upper-and-lower) would logically assemble as a moisture barrier around the wiper-motor posts as it passes through the metal firewall flange, and are sandwiched into a water-tight seal by the large washer and the larger jam-nut.  But with the airbox-cover shroud, it is impossible to press the assembly DOWN enough to engage any threads on the wiper-arm posts.  Omitting the top grommet allows the engagement of the larger wiper-arm post threads, but doesn't allow for enough threads to pass-through the upper-plastic grommet to attach the wiper arm itself to the top post (unless I'm not cranking-down on the jam-nut with enough torque to raise the assembly through the firewall - how much is too much?).

 

No wipers - no State Inspection sticker - no 'drive car'.  SO - I have to solve this problem somehow, but I don't want rain-water leaking into areas it shouldn't, or rusting/corroding areas around the airbox/fusebox/firewall area.  Porsche intended this combination of parts to 'work' somehow, but everyone appears focused on the REAR wiper-arm assembly to post anything useful on how the FRONT wiper-arm parts assembly is installed.  Any photos or guidance GREATLY appreciated here!

 

 

Removal of the shroud was just discussed on the UK 968 forum and this you tube could be helpful?

 

https://www.youtube.com/watch?v=eWpZI4KUrUk

I saw the video - he doesnt show the dual rubber-grommet installation under the large steel washer. Also, the 944 install is missing the large plastic grommet that is supposed to fit under the wiper arm itself...hes bolting the wiper arm directly over the large jam-nut with nothing underneath.

Thats because the 968 is different to the 944, the centre spindle in the 968 is about 12mm longer than a 944


If the spindle is too short you have a 944 wiper frame

Oh no....I was afraid of that....

The motor is the same, correct? SWF 403.062?

Yes the motor is the same on the later 944s, and the S2 Frame is the same, its just the spindle thats different,


I know this to be correct as when I removed my wiper frame the 22mm alloy thread snapped off, I could not find a 968 frame so had to swap the spindle over to a S2 frame, it turned out to be a good thing to do, as the spindles have phosphorus bronze bearings and they were dry as a bone,


An overnight soak in light oil and the wipers are much quieter and move freely,


I guess the previous owner chucked the old parts away, which is going to make it hard to sort out

I notice that the air-box assembly must come ALL the way out to remove the wiper linkage from the car. Yay.
Oh, I did manage to find a 968 linkage in the UK for around $200 so....moving forward!

Any idea how to remove the air-box base? It appears glued-in to the car, and wont budge when I pull on it. All of the mounting screws have been removed. The box base wont allow me to rotate the new wiper assembly and bring the longer spindle through the holes they mount to....

you don't need to remove the base, only the lid, 8 or Phillips cross head screws, you might need to do as franz does, frame in first then attach the motor, not fun by any means, I could get it in in one lump but mine is RHD

getting that base out or even attempting would be a nightmare, as the heater pipes are all attached to that and the controls, its the top of the main heater box in the car

 

then the fun starts, when reassembling the plastic cover goes on first then follow the parts as per the parts diagram,

 

I have just started rebuilding a few of these motors as they are $520 new, they need taking to bits the water drained out the rust removed, and the brushes freed off, then a new bearing (6000 2RS) and the end bush soaked in oil, rebuilt and resealed with a drain hole drilled in the case.

 

nice and quiet then

I was going to post a few photos of my dilemma, but with temps in the 60s here, turns out what I needed was warmer weather. With the sealant warmed up, I was able to insert my fingers into the grills and lift upward, sliding the box base out of the way. A heat gun also would have worked....with the base set aside, the entire wiper assembly fit into place.

FYI - here is the difference between the 944 and 968 wiper posts. I have the correct part number installed, and the factory 968 wiper arm hardware will now fit. The last digit of the 968 mechanism is a 2, the 944 unit is a 0.

Yep its about 10mm longer, glad your sorted, how many screws snapped off?

Quote:FYI - here is the difference between the 944 and 968 wiper posts. I have the correct part number installed, and the factory 968 wiper arm hardware will now fit. The last digit of the 968 mechanism is a 2, the 944 unit is a 0.

Well that photo takes me back about 50 years .... working on the kitchen floor, I'll bet you wipe your oily hands on your shirt too . Just jesting M, I note you have plastic down, which I never did, and bless my mum for being so long suffering! (and I still tend to wipe my hands on my shirt )