BMW Z3 2.8 - OEM+ long term project

BMW Z3 2.8 - OEM+ long term project

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5harp3y

Original Poster:

1,942 posts

199 months

Monday 21st September 2015
quotequote all
Hi Everyone,

Thought i'd create a log of what i'm up to with my Z3.

Picked this up, 2.8i pre facelift, artic silver, sports seats, harmon cardon, chrome pack car a few weeks ago and will probaly spend the next year slowly upgrading with tasteful OEM upgrades aong with making it a great car for next summer.







First upgrades were starting to detango the car to hide its age a little





bought off German eBay for £14 and added some Amber LED bulbs for another £3


next updated the number plate lights with some xenon white LEDs




and then some LED festoon bulbs for the map light and boot (White not Xenon White)




Planned to get the seats out to do the bushes as they were gone on the passenger side and nearly gone on the drivers side. (common problem)

Before i did that i whipped the mats out to clean them (they look original)



cleaned in the shower with some fairy liquid. (wife was away for the weekend)




Then moved outside to get the seats out and fix the bushes.



3/8 mini breaker bar and 16mm socket is perfect for this job!



TREASURE!




State of the 83,000 mile bushes



New bushes in, and i'm grateful for the Z3 / BMW community for having these made but my god they are twice as thick as they need to be. the sanding is THE MOST laborious thing i've ever done on a car. End result is great and the rest was a piece of pie!

Whilst the seats were out i hoovered the car out and cleaned all the plastics





urgh!






seats all in and wobble free!! biggrin

last little touch / mod before washing




not technically OEM but if the car was made today i'd imagine they would put a badge on. this is an OEM+ project.

then i went to the pub



next step is seat tilt mod (coming from USA) and a hood treatment from renovo.

managed to give the Z another wash and fit my seat lift kit from Thayer Motorsport.

This is the link for the kit :

http://thayermotorsports.com/collections/z3-custom...

This is what you get:



good selection of fixings

Process is easy:

Unbolt rear seat 16mm bolts
Unbolt front 13mm nuts
Lift front of the seat up

Build up like this:

Original Nut
Big Washer
Seat Rail
Big Washer
Small Washer
Threaded insert
Spacer
Small washer

Leaves you with this:


bolt everything back up to FT

Difference in the non-tilted passenger seat.



repeat on the other chair.

This is by far the best thing i've done on the Z after the seat bushes. The seats hug me now and i dont slide around in the car under spirited driving conditions.

So cheap to do aswell.

Few little jobs finished over the weekend.

First of which was to start treating the roof as the previous owner had obviously never done this. roof was a bit green and a bit grey too.



out came the renovo dye, i'd already cleaned the roof a few days earlier.

roof before



one coat and its already looking much better



whilst this dried i cracked on with my new rear lights, quite literally a 5 minute job. one 8mm ratchet spanner is all you need.

had to tweak the bulb holders too as they had gone slightly out of shape over the years.

£50 eBay rear lights


orange LED bulb to eradicate tango (all bulbs will be changed in due course)











then gave the car a wax whilst i waited for the roof to dry





So after fitting the LED bulbs to the rear lights and side repeaters i was presented with hyperflashing as the relay was thrown out of sync with the lower draw from the LEDs.

3 options here;

fit resistors to all the led bulbs to 'trick' the relay or mod the relay itself.

3rd option is to fit an off the shelf LED flasher but that requires running little pigtail wires as noone makes a 7pin relay.

the resistors are easy and cheap but always feel like a bodge. so i decided to mod the relay follwing a guide on bimmerfest.

what you need:

2 x small screwdrivers to open the relay
soldering iron + tiny amount of solder
very small drill bit (dremel etc)
1 x schottkey diode (i got mine from RS 781-5616)

Go find your fuse box and the relay




this is the original 7 pin BMW relay


wedge open the two sides with some very small screwdivers and then the board pops out



here are the guts



the bit that controls the flashing frequency is the 'M'shaped piece of metal (acts as a resistor)

unsolder the 'M'



next the holes need to be enlarged to get the diode through



pass the diode through and solder the pins



snip the tails off



completed. (note the positon of the band on the diode)



clip the relay back into the holder and pop it back in the car

start your car and test

et voila, no more hyperflashing and the ability to run LEDs all over the car biggrin

bought a tri-colour stitched wheel off this very forum for great price and fitted it with my exisiting airbag.

really simple process.

Need to disable the alrm first using this keyhole on top of the siren



disconnect battery (10mm socket)

remove lower steering cowl (one philips screw and some clips)

unscrew airbag from behind steering wheel ( 2 x t30 torx)

pop airbag off and disconnect two wires (horn and airbag)



unbolt 16mm center bolt, force needed!

disconnect wires from under the cowl (2 connectors on my single phase bag)

yank wheel off

reverse the whole process





whilst the wheel was off i used the space to replace some blown dash bulbs



sucker needed to pull binnacle out.

BMW handily make note of which bulb goes where! much better



Next was to finally rid the Z of amber.

the process is really simple, 4 x 8mm screws to each light, easily accessed with an extension.

4 connectors and then they pop out.

i removed the airbox and washer bottle to give myself more room (again really simple to remove)

also drilled some holes in my airbox for more noise, no icnrease at idle but a much much better noise at WOT. almost invidible too so looks stock still



Headlights back in and finished.



[/URL]

thats all happened in the last couple of months, more mechanical bits to next to try and sharpen it up a bit before the big cosmetic push in the New Year

Edited by 5harp3y on Monday 21st September 15:46

2013BRM

39,731 posts

284 months

Monday 21st September 2015
quotequote all
Nice, my other half has one and it's a great little car, need to do the seat bushings myself, got a link, and where did you find the headlights?

5harp3y

Original Poster:

1,942 posts

199 months

Monday 21st September 2015
quotequote all
2013BRM said:
Nice, my other half has one and it's a great little car, need to do the seat bushings myself, got a link, and where did you find the headlights?
Seat bushings here:

https://zroadster.org/threads/z3-z3m-z3-coupe-seat...

Headlights from the same forum, but they pop up on eBay all the time. Set went for only £38 a few days ago (really cheap)

aka_kerrly

12,417 posts

210 months

Monday 21st September 2015
quotequote all
Cracking effort, surprised by the lack of love for Z3s.

A prefacelift 2.8 is a great starting point.

e21Mark

16,205 posts

173 months

Monday 21st September 2015
quotequote all
Always fancied building a track version but would like an M coupe style hard top or something. They certainly seem to be good value. Are you going to change the 5 spoke alloys?

fezst

234 posts

124 months

Monday 21st September 2015
quotequote all
Really nice, used to own the 2.8 myself. Sounded great standard and even better with an aftermarket exhaust system.
Nice alloys too - how does the car handle? Worn front wishbone bushes and anti-roll bar links are common with these.

5harp3y

Original Poster:

1,942 posts

199 months

Monday 21st September 2015
quotequote all
e21Mark said:
Always fancied building a track version but would like an M coupe style hard top or something. They certainly seem to be good value. Are you going to change the 5 spoke alloys?
5 spokes are staying for the forseable maybe with some subtle spacing and some lowering

5harp3y

Original Poster:

1,942 posts

199 months

Monday 21st September 2015
quotequote all
fezst said:
Really nice, used to own the 2.8 myself. Sounded great standard and even better with an aftermarket exhaust system.
Nice alloys too - how does the car handle? Worn front wishbone bushes and anti-roll bar links are common with these.
Handling isn't up there with my old mx5. It prefers to understeer but can be provoked.

It's got st tyres at the moment which won't be helping and most of the rubber bushings will be past their best.

Planning on full suspension / drive train overhaul in the new year

5harp3y

Original Poster:

1,942 posts

199 months

Monday 21st September 2015
quotequote all
aka_kerrly said:
Cracking effort, surprised by the lack of love for Z3s.

A prefacelift 2.8 is a great starting point.
For the money I don't know of a car that ticks this many boxes for me.

Straight 6
Big wheels
Lsd
Manual gearbox
Convertible

e21Mark

16,205 posts

173 months

Monday 21st September 2015
quotequote all
M50 inlet swap, 6 branch and lightened flywheel will pep things up nicely. My old e21 runs this spec' and it's quite quick.

NiceCupOfTea

25,287 posts

251 months

Monday 21st September 2015
quotequote all
I've never understood the hate for these.

Supposedly:

Z3 handling - woeful
e30 handling - best thing since sliced bread

Same rear end isn't it?

Podie

46,630 posts

275 months

Monday 21st September 2015
quotequote all
Looking good.

Think I'd add a clear high level brake light to complete the makeover on the lights.

5harp3y

Original Poster:

1,942 posts

199 months

Monday 21st September 2015
quotequote all
Podie said:
Looking good.

Think I'd add a clear high level brake light to complete the makeover on the lights.
Not my cup of tea, especially against the silver

Caddyshack

10,724 posts

206 months

Monday 21st September 2015
quotequote all
My wife had a Z3M and she still misses it. I took it to Donnington, Spa, the ring and a few others and it handled pretty well, a few mates who can really peddle including Trevor Reeves took it out too and all were pleasantly surprised.

5harp3y

Original Poster:

1,942 posts

199 months

Monday 21st September 2015
quotequote all
NiceCupOfTea said:
I've never understood the hate for these.

Supposedly:

Z3 handling - woeful
e30 handling - best thing since sliced bread

Same rear end isn't it?
Handles fine for my needs, but I'm not Lewis Hamilton.

A few choice upgrades can sharpen them up a treat.

My mx5 was much better handling wise, but it didn't have 190bhp and a 6 pot up front

5harp3y

Original Poster:

1,942 posts

199 months

Monday 21st September 2015
quotequote all
e21Mark said:
M50 inlet swap, 6 branch and lightened flywheel will pep things up nicely. My old e21 runs this spec' and it's quite quick.
M50 is definitely on the cards. So many gains. Have you got a decent how to?

Podie

46,630 posts

275 months

Monday 21st September 2015
quotequote all
5harp3y said:
Podie said:
Looking good.

Think I'd add a clear high level brake light to complete the makeover on the lights.
Not my cup of tea, especially against the silver
Funny isn't it? Silver is the one colour I would put a clear brake light on!

Good thread though - interested to see how it progresses smile

hamish88

161 posts

176 months

Tuesday 22nd September 2015
quotequote all
Here was my 2.8 until i sold it last year . Yours looks like a good example
I thought it was a very good car for the money and compared to a mk1 mx5 i had it was miles ahead in most departments .

imo not everyone is a driving god and a normal joe blogs like me i found the performance and handling perfectly acceptable.

You'll not find a lot of love on it from here as most people without really having owned one really slates it.

i had a remus exhaust on mine and it sounded awesome.

sold mine for £1600 quid, try finding a rot free convertible with near enough 200hp for that


KillerHERTZ

942 posts

198 months

Tuesday 22nd September 2015
quotequote all
Nice changes, really update the car!


Instead of using the shower to clean the matts, wack them in the washing machine - always come out perfect (if a little creased!)

I agree with the comment about the sliver High Level Brakelight, would modern up the rear.

Edited by KillerHERTZ on Tuesday 22 September 08:34

anonymous-user

54 months

Tuesday 22nd September 2015
quotequote all
Amazing how a little TLC can bring a car up. Not a fan of clear repeaters normally but those, and the rear lights really suit the colour.

Look forward to seeing how this progresses.