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E31 1991 850i - new lease of life!

5.6K views 17 replies 12 participants last post by  nivonco  
#1 ·
Hi

I've owned my 850i for almost a year. The car was originally intended as a short-term purchase (I am involved in a film in which it will appear, but that's another story). However, the more I drove it the more I liked it, and eventually I decided to keep it indefinitely as a second car.

At that point it became time to write down all the little (and not so little) things that needed fixing. While it was tempting to do a few jobs at a time, many of them were linked and so there was a certain logic to doing them together. Putting jobs off also doesn't make them any cheaper, and it delays the point at which you enjoy the benefit. (You see, it's easy to rationalise spending money on a 20 year old car!).

Anyway, the car has just returned from four weeks at Chris Burton in Rusper. I can't recommend Chris highly enough. Not only does he know these cars literally inside out, but his rates are very reasonable; indeeed, he did a lot of small items free of charge. This is a partial list of what was done:

1. Replace power steering pump.
2. Supply and fit HID lighting system to dipped beam front lights.
5. Replace boot wiring loom
7. Drivers seat twisting in to center tunnel – strip out and replace drive cable adjust and reset.
8. Remove roof card and A / C posts – re-trim in new auto roof fabric (light grey)
9. Examine rear sun blind operation – faulty rear drive motor. Remove interior seating (rear) remove motor from carrier and harness.
10. Re- trim parcel shelf with auto fabric (black)
16. Battery drain established as boot wiring issue
18. Fit Becker Indianapolis radio – complete re- wire speaker cabling through car as BMW line cables heavily modified from previous installation
21. Attend to rear shock absorber top mounts pulled through
22. Address excessive play in front brake reaction arms
23. Address excessive play in rear tie rod bushes to body
24. Address excessive play in rear upper control arms
28. Established Brake servo assist leaking from rear connection to brake master cylinder.
29. Front wheel alignment – due to track rod change

Plus lots of minor bits. Individually none of these issues stopped me driving the car (at least until MOT time) but the cumulative impact of getting them all done is surprisingly great - it literally feels like a new car. The particular ones I would recommend are the suspension fixes (no more squeaks and groans), new radio (the old one wasn't working; the new one sounds and looks great), the headlining and the headlight conversion (although it does make the remaining original lights look very weak and yellow, even with Nightbreakers). Little things also make a difference, e.g. not having to unlock the boot manually and being able to get the seat at the right height without twisting.

Having got this far, it seemed only appropriate to get the car detailed. Luckily there is a well-known detailing firm a couple of miles from Chris Burton, namely Invisible Touch. Christian did a great job, particularly given that the quality of paint on the car is at best uneven. I also got the seats reconnollised, as the leather was very creased and the colour had rubbed off in a few places. Unfortunately I forgot to take any 'before' photos, but this is what it looks like now:



Overall I'm thrilled that the car has a new lease of life. Maybe the economics don't make sense (although hopefully in the long term the cost of all this is no more than the depreciation on a newer car), but there is certainly something more satisfying about keeping an old car in good shape rather than just selling it and buying a newer one.

Jonathan

PS If you've read this far, you will realise that I have taken out the old radio. In fact, I now have two becker Professional C RDS head units and two amplifiers. When the original didn't work, I tried a different head unit off eBay, then a different amp, but without success. Maybe some or all of these items work (you will see above that Chris had to change the wiring to get the Indianapolis to work) - your guess is as good as mine. At least some of the parts should be usable. Anyway, I would be happy to pass them all on free to a good home - I work in London W1 and live in London NW3, so you can pick them up in person at either place or arrange your own courier to collect (they are too heavy to post). PM me if you're interested, but please only take them if you are going to try to use them rather than to put them back on eBay!
 
#2 ·
Love it, great job. Need my drivers seat sorting as it has the same problem, worked fine when I bought it until I 'played' with the memory and tilted it all the way back to complete recline - why i ask my self, idiot!
 
#15 ·
super simple repair. Identify the relevant motor, dismount the bowden cable and shorten the outer part a little bit. The problem with ALL older electric BMW seats (regardless of the model) is, that the inner cable shrinks over the years and looses the connection to either the motor of the drive on the other end. With a little bit of experience it's a matter of 30 minutes to fix it.
 
#3 ·
Nice Job, You will definitely enjoy it more and probably everyone else on here will agree as to the benefits.
I too have addressed suspension issues (no more squeaks), changed calipers (no more shimmy) and installed a Digital Radio (so I can listen to Planet Rock).
Having done these fixes, I feel I want to keep the car longer than first thought.
Mine was used in a music video, which is due for imminent release (I hope its not embarassing).
 
#6 ·
Grrrrrrrrrrrrr I hate you! That happens to be my favorite colour, your car my friend is beautiful, best one Iv'e seen, well close to
a white and a grey one that I think Steviep had. Now before I come and torture you, what polish or valaters did you use, it has that
new look.
 
#12 ·
That happens to be my favorite colour
Cheers - I'm fond of the colour myself (not a fan of red or green; black seems quite common, and yellow is a bit, shall we say, flamboyant :) ).

For anyone who is interested, the official name for the colour is granite silver metallic (code 237). One of the most useful sources of information I have found as an owner is the original buildsheet, which you can get free from 8coupe.com by sending them the last seven digits of your VIN (you have to register first, which involves sending some photos of your car). This site can also tell you how many of each colour etc were made, so for example it seems that 1,046 850i (or 850Ci) automatics were made for the UK market (or other Euro RHD markets). Of these, only 41 were granite silver (there were also 2 850 CSis in that colour). There were also only 31 UK 850is with black buffalo leather interior (of which I suspect not all had the sport seats and/or heated seat options). I don't think they can yet tell you how many cars have a particular combination of exterior and interior colour, but htey are working on it. In the meantime, if you want a UK 850i with granite silver and black buffalo leather, make me an offer :).

Jonathan
 
#11 ·
Thank you all for your kind words.

The detailing was done by Christian at Invisible Touch, who by a happy coincidence is only a couple of miles from Chris Burton:

Invisible Touch Detailing - Car Paintwork Correction Horsham Crawley West Sussex

One thing I would say is that you shouldn't expect miracles. Even the best detailer can't disguise the fact that it's a 21 year old car. The paint is very thin in places, and so there is a limit to what machine polishing can do - it looks great from 3 yards away but less great from 3 inches! The above said, it's still much better looking as a result of Christian's efforts. And most of the time I am at least 3 yards away when looking at it :).

Jonathan
 
#18 ·
Well Done Nice Cra

Hi,

I am in process of moving back to the Uk and have a LHD 1991 850i I am bringing over. It only has 44000kms on it . It is a Japanese spec and therefore virtually the same as European spec with rear fogs etc. It has been lowered and has Bilsteins,rechipped removing the limiters and giving it more snap off the line.I have a Supersprint exhaust system and it has been decatted [ as it is a 1991 not mandatory in UK I believe] .It also has a "Strong Strut" shock tower brace. The throttle bodies and the intake gaskets have recently been replaced.
There are a few minor issues that require attention : The drivers ac/heart vents are inoperative,the hazard lights don't work and there is an occasional backfire from the left bank- right exhaust. I also want to replace the radio with a later CD43 and I have a unit. I have a 3 spoke Steering wheel to install,Csi mirrors,front spoiler and rear splitter.Ultimately I will want a complete "good" respray. The body is good with no rust but shows 20 years of age.I have been in touch with Chris and found him very communicative,knowledeable and helpful I intend to take the "Beast" to him.