993 Noisy Rear Spoiler
Discussion
On my 993 the electric motor and the worm gear is on the left hand side of the spoiler and is encased. Unscrew the casing...a couple of philips screws from memory. You will then see two parts to the unit the worm gear unit and the electric motor and two microswitches for on/off switching of the spoiler. There are three alen key bolts at the worm gear end. Before unscrewing them, put a cloth over the air intake below (don't want any screws down there). Unscrew them and remove the unit which also detaches from the electric motor further down quite easily. Although the gear is a sealed unit, it comes apart by severing with a stanley knife (re-attached via super glue)...cleaning with white spirit and greasing up, but you should then replace the bearing for the sealed type 625-2RS, which involves tapping it out etc. I have to say the instructions on http://p-car.com/diy/spoilerdrive/ are quite good, but be careful he did have a spare complete gear unit should things go horribly wrong!!!
Edited by truckpdt on Sunday 8th October 11:03
I decided to tackle the noisy spoiler issue at the weekend.
The p-car instructions/pics are top notch, and the replacement bearing was £1.20 off e-bay.
It wasn't as difficult as I feared to get that little gearbox apart, but it was a complete b*stard to get the bearing off the worm drive. In the end the bearing broke, leaving the inner sleeve still firmly attached to the shaft and I had to carefully remove it with an angle grinder! And the splined cable connector (on the same shaft as the bearing)was almost as tricky. They obviously didn't anticipate these things being dismantled. Still, it's all reconstructed now, just need to get it back on the car.
I'll be pissed off if the spoiler is still noisy though.
The p-car instructions/pics are top notch, and the replacement bearing was £1.20 off e-bay.
It wasn't as difficult as I feared to get that little gearbox apart, but it was a complete b*stard to get the bearing off the worm drive. In the end the bearing broke, leaving the inner sleeve still firmly attached to the shaft and I had to carefully remove it with an angle grinder! And the splined cable connector (on the same shaft as the bearing)was almost as tricky. They obviously didn't anticipate these things being dismantled. Still, it's all reconstructed now, just need to get it back on the car.
I'll be pissed off if the spoiler is still noisy though.
Marc (A993LAD), can I ask what place you got the bearing from? The reason I ask is mine never turned up!!! I had to raise it with ebay/paypal as a non-delivery to me and it's yet to be resolved.
Can I also ask what tools were required to do the job and what glue did you use to re-seal the wormdrive container?
Can I also ask what tools were required to do the job and what glue did you use to re-seal the wormdrive container?
I got the bearing from these guys - http://stores.ebay.co.uk/J-B-ENTERPRI
Key 625 2rs into the search box on their ebay shop, or
The actual bearing should appear here - http://search.stores.ebay.co.uk/J-B-E
£1.20 plus 60p postage. Very quick delivery.
I just used super glue gel to re-attach the two halves of the plastic casing. You definitely need a couple of clamps to hold it together. Once the glue set I also went round the join with some silicone to be sure there are no gaps for the grease to escape.
I packed it out with standard grease first and also cleaned and greased the drive cable as well. It's a bit fiddly trying to get enough grease into the casing, whilst keeping it off the edges where the glue needs to be applied.
Cutting the case in half with a stanley knife is not easy either, and I have to confess mine didn't look half as neat and tidy as the pics on p-car. But it seems to have gone back together okay.
I'll try and get it bolted back in the car tomorrow and let you know if it's an improvement.
Key 625 2rs into the search box on their ebay shop, or
The actual bearing should appear here - http://search.stores.ebay.co.uk/J-B-E
£1.20 plus 60p postage. Very quick delivery.
I just used super glue gel to re-attach the two halves of the plastic casing. You definitely need a couple of clamps to hold it together. Once the glue set I also went round the join with some silicone to be sure there are no gaps for the grease to escape.
I packed it out with standard grease first and also cleaned and greased the drive cable as well. It's a bit fiddly trying to get enough grease into the casing, whilst keeping it off the edges where the glue needs to be applied.
Cutting the case in half with a stanley knife is not easy either, and I have to confess mine didn't look half as neat and tidy as the pics on p-car. But it seems to have gone back together okay.
I'll try and get it bolted back in the car tomorrow and let you know if it's an improvement.
Success! Success!
I've fitted the refurbished spoiler drive gearbox back onto the car and the spoiler now goes up and down as smooth and quiet as anything. I'd got used to the grinding noise so it's a revelation to see (hear?) how these things were meant to be when the car was new.
So I thoroughly recomend the procedure as set out on the P-car site.
The tests they set out to establish if it is the little drive gearbox are very quick and easy to do. So do those first, because it will save you wasting time stripping the gearbox down if there's nothing wrong with it. Once you've established it's the gearbox, then I'd imagine it's 99% certain to be the bearing. Mine was completely devoid of any grease and rusty as well. In fact I'd suggest another test not mentioned in the p-car article.
Do their tests first. Then remove the gearbox as instructed. Then try raising and lowering the spoiler using your hands. You can do this easily once the drive gear is removed, and it will identify if all of the hinges/brackets in the remaining mechanish work smoothly.
Once you have the worm gear out of the gearbox, be very careful how you try to remove the bearing. You REALLY REALLY do need a small punch of some kind that will fit down the small hole in the end of the cable connector. I used a small drill as a punch because I didn't have punch small enough.
So in summary, the whole job is pretty fiddly, but despite my lack of engineering skills, I got a very successful result.
Given that the bearing cost £1.20, and the job only took a few hours, it's well worth it. Shame Porsche didn't just use a sealed bearing in the first place!
Good luck fellas
I've fitted the refurbished spoiler drive gearbox back onto the car and the spoiler now goes up and down as smooth and quiet as anything. I'd got used to the grinding noise so it's a revelation to see (hear?) how these things were meant to be when the car was new.
So I thoroughly recomend the procedure as set out on the P-car site.
The tests they set out to establish if it is the little drive gearbox are very quick and easy to do. So do those first, because it will save you wasting time stripping the gearbox down if there's nothing wrong with it. Once you've established it's the gearbox, then I'd imagine it's 99% certain to be the bearing. Mine was completely devoid of any grease and rusty as well. In fact I'd suggest another test not mentioned in the p-car article.
Do their tests first. Then remove the gearbox as instructed. Then try raising and lowering the spoiler using your hands. You can do this easily once the drive gear is removed, and it will identify if all of the hinges/brackets in the remaining mechanish work smoothly.
Once you have the worm gear out of the gearbox, be very careful how you try to remove the bearing. You REALLY REALLY do need a small punch of some kind that will fit down the small hole in the end of the cable connector. I used a small drill as a punch because I didn't have punch small enough.
So in summary, the whole job is pretty fiddly, but despite my lack of engineering skills, I got a very successful result.
Given that the bearing cost £1.20, and the job only took a few hours, it's well worth it. Shame Porsche didn't just use a sealed bearing in the first place!
Good luck fellas
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