Jump to content
www.BoXa.net
topradio

Fitting a GTS rear diffuser to a 981

Recommended Posts

Having seen Ringer250's car at Castle Hedingham I decided that I wanted to fit the GTS rear diffuser to my car.

So a few weeks ago these turned up

F3Qv1Wx.jpg

I had read that it is easier to do this job by removing the bumper and I have to say that I think doing it this way saved a lot of struggling with the clips etc.

Started off by removing the five small screws on the leading edge of the spoiler and removing the cover

ObQzl13.jpg

This revealed two nuts that secure the rest of the spoiler to the mechanism

kEEw8KF.jpg

I then removed the tail lights by unscrewing the single bolt in the boot and pulling the lamp out. I used a tip that I found on another forum which was to use a cable tie in a loop around the rear of the lamp to pull it cleanly out of its mounting.

IEErfHb.jpg

tq1Eaao.jpg

Next it was just a case of removing the 2 screws on each side behind the lamps, the two from below the spoiler, two from the wheel well on each side, two from behind the bumper near the exhaust exit and two more each side underneath the diffuser.

dfdFchu.jpg

FJkmEho.jpg

9bh4TTw.jpg

GFB3k0z.jpg

fOJ4ybh.jpg

The bumper then could be pulled free on each side 

mtlMJgb.jpg

After disconnecting the multi plug for the PDC etc. I was able to remove the complete bumper and diffuser revealing the inner workings of the rear of the car which I think are a work of art in themselves.

vQNCx9a.jpg

I then unclipped the PDC sensors & the various fixings that secure the diffuser to the rest of the bumper

 

alhc822.jpg

llYz74c.jpg

 

This is the rear part of the old diffuser that clips back in place to secure the new parts.

N8Ku6Zj.jpg

And this is the bumper with the diffuser completely removed. I was a little surprised at the amount of gravel rash on the bottom corner of the bumper after 12000 miles but I don't suppose you can expect to make an omelette without .................................etc.

7oPsALB.jpg

c8jbUdf.jpg

YytdxMl.jpg

Reassembly was basically the reverse of above and this is a shot of the completed assembly before I fitted it back to the car.

VwF7OKs.jpg

The exhaust tailpipe was showing signs that I had not polished it in 12k miles so with a little elbow grease I made it acceptable. I would like to perhaps get this re-chromed in the future but as its welded in place, this will require grinding it off and welding back on.

uIbNwgI.jpg

dpkiyny.jpg

And this is the finished job back on the car. I reckon that the whole job took about three hours including photos and coffee - so not too bad.

daopMVw.jpg   

 

 

 

 

Edited by topradio
tidy up
  • Like 3

Share this post


Link to post
Share on other sites

Nice job there fella and wonderful curtains too:D

  • Like 1

Share this post


Link to post
Share on other sites
1 minute ago, SUB0 said:

Nice job there fella and wonderful curtains too:D

I think its a duvet cover. Going to have to get it clean for tonight :lol:

Share this post


Link to post
Share on other sites

Very detailed how to there brilliant thanks, I'm glad mine is part of the bumper. :)

Guvs.

Share this post


Link to post
Share on other sites

Top radio - Great "how to".

Glad I was able to help spend your money! Did you get the diffuser from UK or Tiele in Germany?

 

Share this post


Link to post
Share on other sites

Hi Steve, yes I got it from your link - Poland IIRC although I understand that the part is now available in the UK.

This may make you smile, while doing the write-up I couldn't for the life of me remember securing the PDC loom back to the bulkhead, then thinking more I really had no memory of reconnecting the parking sensor loom! So I went and checked their operation and, you guessed it, NO PDC just a warning triangle in the PCM screen.

So in the last hour it was off with the bumper again, reconnect the loom and secure it and refit the bumper - 50 minutes, but then I had done it before:huh:

I was obviously so excited to see the result of my work I had missed out a vital part.

Edited by topradio
  • Like 1

Share this post


Link to post
Share on other sites

Did you do a "before" photo?

If so, could you please post Before and the After, so we can see the difference?

Share this post


Link to post
Share on other sites

Yes, it was Poland. I checked and double checked the part numbers before and after the diffuser arrived just in case it was not a genuine part!

Glad you remembered about the looms! Would have been very annoying discovering this the next time you drove it!

Great write up and pics.

 

 

Share this post


Link to post
Share on other sites

DJMC - I didn't do a before pic but I am sure that I have one somewhere, if I can find it I will post them together for comparison.

Steve - they also have a sister company in Germany and they seem to be well respected so I was quite happy dealing with them.

Share this post


Link to post
Share on other sites
48 minutes ago, DJMC said:

Did you do a "before" photo?

If so, could you please post Before and the After, so we can see the difference?

DJMC, borrowed this from Planet 9 - original in first shot, GTS style in second. The GTS diffuser hides the exhaust boxes which you can see through the gaps in the original diffuser.

With apologies to Topradio for jumping in on this!

 

image.jpeg

Edited by Ringer250
Photo missing

Share this post


Link to post
Share on other sites

Is this the standard S rear? If so, is what I see through the gaps exhaust or suspension? Or a bit of both?...

topradio's under...

 

412052445.jpg

412052449.jpg

Edited by DJMC

Share this post


Link to post
Share on other sites

Yes that's a standard S diffuser, you're seeing a bit of the exhaust and some suspension parts.

Edited by topradio

Share this post


Link to post
Share on other sites
17 minutes ago, DJMC said:

Is this the standard S rear? If so, is what I see through the gaps exhaust or suspension? Or a bit of both?...

topradio's under...

 

412052445.jpg

412052449.jpg

Top one looks like a modified exhaust. With a standard or S the factory fit diffuser is the same. You will we mostly the exhaust boxes albeit a slightly different shape if it is PSE or standard and a bit of suspension at both ends.

Share this post


Link to post
Share on other sites

Nice job and well done too. I presume you don't have rear parking sensors in yours?

Share this post


Link to post
Share on other sites
7 hours ago, rpn said:

Nice job and well done too. I presume you don't have rear parking sensors in yours?

Looks like they are in the new diffuser, so I think he does.

Share this post


Link to post
Share on other sites

rpn - yes I have PDC, I ordered the part with holes and mounts for the sensors - it was all plug and play. Having taken the bumper off (twice!) its definitely the way to do this mod rather than scrabbling around on the ground. 

Edited by topradio

Share this post


Link to post
Share on other sites
On 02/01/2016 at 6:09 PM, DJMC said:

Is this the standard S rear? If so, is what I see through the gaps exhaust or suspension? Or a bit of both?...

topradio's under...

 

412052445.jpg

412052449.jpg

Just a photo for a comparison, this is a 987 rear diffuser and it is molded into the bumper so it's a complete bumper change.

Exhaust%20tips%20007_zpsvptbbu3u.jpg

Guvs.

 

Share this post


Link to post
Share on other sites
On 2 January 2016 at 6:31 PM, Ringer250 said:

Top one looks like a modified exhaust. With a standard or S the factory fit diffuser is the same. You will we mostly the exhaust boxes albeit a slightly different shape if it is PSE or standard and a bit of suspension at both ends.

Yes, looked under mine today, through the slots, and all I see are two exhaust boxes and no suspension. It's a Cayman, but I'd guess it's the same?

Also looked at Ringer250's car today to compare.

Share this post


Link to post
Share on other sites

Ed

Looks great, good to read that you have plenty of experience removing the bumper now :). I must confess that this method seems a far better way of changing the diffuser than leaving the bumper in situ as I did and trying to change it whilst underneath the car in very tight space.

If I ever decide to put the old ones back, then I shall be following your approach.

Cheers & great job

Tony

 

 

Share this post


Link to post
Share on other sites

Hi Tony. Yes I have kept the old parts in the unlikely event of trading the car to an OPC, I could imagine them being funny about the non-standard appearance and want to offer less based on that.

  • Like 1

Share this post


Link to post
Share on other sites

Or, like when I sold our last one, selling the rarer parts later yielded more money than leaving them on the car and selling the standard parts. :)

Share this post


Link to post
Share on other sites

So after eventually getting the correct parts (Porsche sent the standard diffusers with the part number for the GTS diffusers :mellow:) I set about fitting the diffusers. I looed at topradio's excellent thread but had noticed on an US thread that it could be done without removing the bumper.

I started but soon decided that it was impossible :rolleyes: and was looking to remove the bumper. However having sleeping on it I decided to tackle it again.

After releasing the fastners and working from the corner of the diffusers at the rear wheel I started to free the clips working my way to the exhaust centre trim using fingers and trim tools and on the visible clips I opened them ad then fed strips of plastic in to stop them re-clipping. As with every one else the centre clips on the exhaust trim are difficult to access but I got some decent photo's to show others what you are trying to do.

DSC01991_zpsmxccqkjl.jpg

Centre trim with side diffuser removed

DSC019921_zpstztfjoaf.jpg

close up The RED 'D' is representative of the diffuser clip when inserted and the exhaust trim tab fits into the 'D' You need to lever the tab out of the 'D'. I used a long shank flat crew driver to lever it out. Access is incredibly bad though. 

See the pic below showing the diffuser and clip in situ

DSC019901_zpstjp0gb7f.jpg

The fitted diffuser !

DSC01994_zpsgrfrsfdr.jpg

Certainly an awkward wee job!

 

 

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×