Barty's Green Z4 Coupé - Not another one…

Interior make-over: phase one complete

It's been 2 very busy weeks... I can honestly say I haven't changed this much on a car over such a short period of time before. A look back through the make-over. First though, let's take a look at how it all began

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19th of May, and the start of the big swap. I had two days to strip everything out and return the car to a bare minimum drivable condition. This because of my appointment with the tinters on the 21st. That meant: strip the center console, seats out, all plastic trim panels, everything had to go. Not just the cabin, but the boot too. Great opportunity to check out the top mounts on the rear towers: pristine! Cut-up sound proofing further reminded me of the installation of the ST coil-overs.

After about 8 hours work I was left with the bare shell of my Z4 and a heap of beige parts. Note the small patch of beige carpet left deep under the dash. This was cut away from the main body and left there on purpose. Not so much as an easter egg for the next owner (yeah right) but more because of the sheer impossibility to remove this without removing the dash as well. Something I didn't want to bother with, so made an identical cut-out in the new black carpets. Since this is about 10-15cm behind the end of the center console, you'll never see it again.

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From that point on, it was build back and enjoy! Started with the carpets, then moved to the surrounding trims. Everything went back together smoothly, although replacing the throttle pedal was a challenge with the relatively short cable that had to be pulled through the carpet. A liberal application of foul language proved fruitful. While at it, I replaced the stock pedal rubbers with aluminium pedal covers. Drilled 4 6mm holes and bolted down easily. The throttle pedal will require a different approach and as such should be finished later this week.

Built back about 50% of all trim, replaced the seats after a deep clean and leather treatment, and whacked on the old gear knob so I could drive without cutting the top of my hand on the bare stick (don't...). After about 2 hours of work, I was confronted with a whole new look.

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Love it! The guys really did an amazing job and are renowned for their quality and attention to detail. It shows: no white edges, no rough transition between the dots and the glass, simply lovely. On the way back I picked up my newly painted dash and console panels, matched to the exterior Tiefgruen Metallic green.

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Then built back the boot trim with new items I'd sourced. My old trim was in fine condition, but these had the storage nets included. Since everything was out anyway (to accommodate the tinters), I'd figured why not rebuild with the new set. Steam cleaned and fabric coated: in we go.

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Swapped the door cards as part of phase one. The inserts match nicely to the seats, although they're temporary due to the plans in phase three.

Another day was spent building back the final few pieces, finally resulting in an actual BMW Individual interior. While I don't have the leather console or lovely door cards to show for it, the result feels extra special to me knowing I put it all together myself. A make-over indeed, with a result that I'm really pleased with.

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Some of the jobs done:

- Resprayed trim panels
- Replaced, steam cleaned and fabric coated carpets
- Replaced, cleaned and coated plastic panels
- Deep cleaned seats and treated leather
- Swapped door cards and transferred beige items from the old ones
- Repaired and resprayed soft-touch layer on gear surround
- Storm Motorwerks gearknob (V1) and handbrake lever
- Installed cup holders
- Replaced all trim clips and holders to prevent rattles
- Tinted rear windows
- Replaced, reupholstered, resprayed and coated the new Z4 Individual steering wheel
- Repaired and resprayed the steering wheel trim and button casings

When I saw this list beforehand, I had an idea of what I wanted the result to turn out like. It's become even better, and I really love the new look. Next phase: headliner, sound proofing in the doors and central area and upgraded speakers.

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Looking very good there Bart. I can’t help thinking you will be looking for some M-Sport seats before long.

How did you get the trim panels sprayed, they look amazing?
 
Thanks [ref]Zedebee[/ref], you’re right in that the seats won’t stick around forever…

I removed the trim and took it to the painter we work with. To be honest the result isn’t quite perfect as there are a few old cracks starting to show, but that’s fine for now. They’ll be redone once more in the next few months when working on the speakers
 
I meant the dash/console panels that you have painted green. Is it a special finish or just the same as you out on an exterior panel?
 
:thumbsup: Very nice, where if you get hooted at by a grey XC60 on the Dutch slowways you’ll know who it is
 
[ref]Zedebee[/ref], the finish is the same as the exterior; metallic deep green

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[ref]Jembo[/ref], thanks! I’ll keep an eye out. Whereabouts should I keep my eyes -and ears- peeled?
 
Amazing project Bart, looking forward to detailed pictures of your sound deadening part of the project. What’s the name of colour? Metallic green?
 
SGRG said:
Amazing project Bart, looking forward to detailed pictures of your sound deadening part of the project. What’s the name of colour? Metallic green?

Thanks! Since the seats will come out for replacement I’ll tackle the speakers then too. And when I take on the speakers I’ll add sound deadening. One thing I’ve learned already: plenty of that under the carpets. Main areas to focus on are doors, bulkhead and roof.

The colour is Tiefgruen Metallic, A43/6. 94 LHD coupes were built, of which 30 made it to Europe. Chances of finding another are slim here haha
 
Barty said:
[ref]Zedebee[/ref], the finish is the same as the exterior; metallic deep green

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[ref]Jembo[/ref], thanks! I’ll keep an eye out. Whereabouts should I keep my eyes -and ears- peeled?

We take the Autoroutes from Eurotunnel to Germany via Antwerp & Eindhoven… more often at night to avoid the new dutch daytime 100kmh Max speed limits …

probably do the trio 4-5 times a year :thumbsup:
 
Jembo said:
We take the Autoroutes from Eurotunnel to Germany via Antwerp & Eindhoven… more often at night to avoid the new dutch daytime 100kmh Max speed limits …

Haha, just use Flitsmeister in NL and keep your eyes out. you will be safe (mostly) :).
 
Jembo said:
Barty said:
[ref]Zedebee[/ref], the finish is the same as the exterior; metallic deep green

69607683-085E-4AF1-9129-88E1C1CB510F.jpeg

[ref]Jembo[/ref], thanks! I’ll keep an eye out. Whereabouts should I keep my eyes -and ears- peeled?

We take the Autoroutes from Eurotunnel to Germany via Antwerp & Eindhoven… more often at night to avoid the new dutch daytime 100kmh Max speed limits …

probably do the trio 4-5 times a year :thumbsup:

Rightly so: 100kmh during the day is still bizarre. Probably why very few stick to it :lol:

Good to know you travel to and fro between the UK and mainland; often tempted to buy parts but can’t get them over here or at an absurd rate :o
 
Aero Madness and the start of Phase 2 on the Interior

It's been a while, but I've not been idle with the coupe! I've had the chance to really enjoy the new interior over the last few months, and it has become a lovely place to be. It just feels special knowing you've put it together yourself. The steering wheel is a particular favourite of mine.

Exterior progress
With all that work on the inside done, my focus shifted back to the exterior. The mantra I have for the Z4 is simple: only use that which could have been OEM or is of equal -or higher- quality. The design never gets old to me, yet I also feel it would benefit from a few tweaks. The various aero components by BMW can certainly help in that regard, so that quest (which truthfully had been underway for a while) came to the forefront. First was the addition of a carbon aero lip on the rear:

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Once I saw one on the silver coupe of a client, I knew I wanted it on the green. The combination of carbon and green really worked in my mind, and I'm happy to report it does so too in the metal! Then took it to Bimmerfest with no less than 15 E86's, which was an absolute blast.

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While still on the look-out for a set of aero skirts, I suddenly spotted the latest project by our very own [ref]Zedebee[/ref]! Maldives Blue with -sure enough- a set of aeros. We soon got talking on how we'd get them from the UK back to the Netherlands. A befriended transport-planner soon turned out to be a life-saver, as we'd been stuck with either impossible options or implausible pricing. Once here, I dropped them off at our local paintshop and then proceeded to wait for what seemed like forever. A few weeks back though, it was time...

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Picture really does say a thousand words doesn't it? I'm still struck every time I walk up to the car by just how right they look on there. The profile feels more balanced, the width now matches the more aggressive wheel-setup; they just belong. A massive, massive thanks to [ref]Zedebee[/ref] for making this happen. You've been an absolute gent to deal with and I couldn't have asked for someone more thoughtful and persevering, especially when faced with the logistical challenge of getting them here.

With the sides done and the rear lifted, I feel we're close but not there yet. An M-bumper is absolutely on the shortlist, while I still have something kicking about to complete the back end. Is that it then?

Well... No. There are 2 more components in the pipeline to really complete the look. They're not even built yet, but I'm already buzzing with anticipation. More on that in a few weeks...

Interior Phase 2 is a Go!
The cabin had 3 original parts left: dashboard, seats, and headliner. Spoiler alert: none of these will survive my work... First up: headliner. Beige, stained, and damaged in a few places. It had to go. Throw it out and get a black one then? Rare as hen's teeth, so custom it was! Off to Meneer Sam in Apeldoorn, an upholsterer with a good reputation and who often works on classics and special projects. From the get go, I felt I was in good hands. Two weeks ago I dropped off the headliner, A- and B-pillars and the sun visors. Last Saturday, I built everything back into the coupe and was greeted by this:

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Apologies for the crap quality pictures, for some reason my laptop has decided to compress them into something grainy and ungainly. The result really does look epic in the flesh. Soft, well-finished and high quality; it lifts up the interior space hugely. For more pics, check out Instagram (link in bio below).

As for the seats: I've tried out a few, and really felt at home in the Recaro Pole Positions. They'll be up next, hopefully before my Eiffel/Vosges/Alps/Dolomites/Croatia trip in September. Finally I mentioned the dash. That will be a winter project, combined with a full overhaul of the audio system and the integration of an Android headunit. Not like your regular 2-Din system, or like the one mounted on top of the dash. I've got something different in mind... Currently working out the innards of the dashboard to determine feasibility, so stay tuned!

Technical Changes
While there's a lot of aesthetic work going on, the technical side hasn't been forgotten. An interim oil service is scheduled in the next few weeks, as well as the full PCV replacement, removal of the CDV and a brake upgrade. The rear suspension has recently developed a slight clunking noise, so that's under investigation as well. A full rear-end refresh is planned for this winter, taking out the subframe (off to powdercoat) and replacing all bushes. So we'll have to see what needs to be done now vs later.
 
Your car is looking stunning Bart.

I love the aeros, alcantara headlining and body colour interior trim. :wub:
 
Excellent work Barty! The car looks amazing! :thumbsup: The matching green bits in the interior combined with rest of it black turned out fantastic.
Also, great writeup. It's really fun to follow your journey with the car (both here and on Instagram). :)
 
Interim Update

Finally took a brave pill and decided to complete the rear end. I’d had this panel lying around since mid-May, but didn’t get round to taking off the bumper and getting the cutters out. Until now.

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The aero diffuser, which is actually a replica made by Silvano at Carbon Production in Germany and resold through Burkhart Engineering, has been fitted.

Took the rear bumper off last night, measured out the heart of the bumper, masked off the template, took a solid sip of 18 year old Macallan and then proceeded to take a cutter to the rear bumper.

About an hour later everything was ready to be refit, and I can honestly say the rear end now looks complete. The diffuser blends well into the rear lines, matches with the wing nicely and the carbon sets off against the green just enough to be noticed, but without being too “in your face” about it. Absolutely love it.

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Sometimes I forget to look back at just how far the Zed has come. The interior has had a make over, and the exterior is moving along that same trajectory. I can tell you this much: I’ve got another 3 body panels to replace, and a set of headlights to modify.

First though: I’m going to ask a friend to drive it and just ride behind it for a bit. This looks so right to my eyes 8)
 
Barty said:
took a solid sip of 18 year old Macallan and then proceeded to take a cutter to the rear bumper
:rofl: I know exactly how you feel

Looks stunning Barty - I love the subtleness of each change you've made, nothing overt or in your face, and yet combined they make a real impact, as evidenced from your last photo.

Keep the updates coming (and thanks again for the steer re sourcing of template :thumbsup: )
 
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