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by Brucey
Mon Oct 16, 2017 8:34 pm
Forum: Engine - Mechanical - Electrical
Topic: Engine stumble
Replies: 2
Views: 41

Re: Engine stumble

sounds like you at least have a fault with the wiring, probably a bad earth connection that is shared with the wiper controls. This is probably what is triggering the wipers.

You may have another fault as well, but one at a time, eh....

cheers
by Brucey
Mon Oct 16, 2017 8:27 pm
Forum: Engine - Mechanical - Electrical
Topic: M635CSi slow return to ilde
Replies: 7
Views: 706

Re: M635CSi slow return to ilde

that'll be your idle control valve then. It is just a different sort to normal with a different name. Somehow there is too much air and too much fuel getting into the engine until the idle settles down. I am a bit suspicious of a sticky throttle/throttle cable, since if the TPS and the throttle were...
by Brucey
Mon Oct 16, 2017 8:15 pm
Forum: Engine - Mechanical - Electrical
Topic: M90 polished bananas and cam cover.
Replies: 9
Views: 196

Re: M90 polished bananas and cam cover.

they've come up well. If you recall I test-polished part of one and thus determined that it was just a polished finish, having previously supposed that they might be chrome plated.

I don't envy anyone the job of doing it in the first place or re-doing it after they went all furry!

cheers
by Brucey
Mon Oct 16, 2017 8:05 pm
Forum: Engine - Mechanical - Electrical
Topic: Hunting on start-up.
Replies: 3
Views: 50

Re: Hunting on start-up.

there is only one reason why the engine runs at 1100rpm when it should be idling; there is too much air getting into the engine . This in turn means that 1) there is an air leak (in which case the idle is likely to be too high all the time) or 2) that the idle control valve is faulty (sticky) or 3) ...
by Brucey
Fri Sep 29, 2017 10:46 pm
Forum: Engine - Mechanical - Electrical
Topic: 1984 633 CSi Erratical idling
Replies: 15
Views: 1157

Re: 1984 633 CSi Erratical idling

yep, often a sticky ICV only works when it is warm.

cheers
by Brucey
Fri Sep 29, 2017 10:42 pm
Forum: Engine - Mechanical - Electrical
Topic: 5-speed swap: does it add to car's value?
Replies: 5
Views: 140

Re: 5-speed swap: does it add to car's value?

buy the bits for the conversion and sit on them. There will be one of three outcomes 1) you will make your mind up 2) the car will make your mind up for you (the autoboxes do break occasionally) 3) you will sell the car with the autobox still fitted, at which point you can sell the manual conversion...
by Brucey
Thu Sep 28, 2017 6:26 pm
Forum: My Project
Topic: New to me 1988 635csi!!!
Replies: 11
Views: 378

Re: New to me 1988 635csi!!!

oil bubbles in PAS reservoir when 'bomb' is discharged can indicate that the bomb is on the way out but it can also indicate that the oil that went into the bomb was full of tiny bubbles to start with, for which there are many possible causes. Suggestion; get the system good and hot, turn the engine...
by Brucey
Wed Sep 27, 2017 5:51 pm
Forum: Engine - Mechanical - Electrical
Topic: Thermostat opening temperature
Replies: 14
Views: 367

Re: Thermostat opening temperature

is there any assurance that the old 'stat is any good? If it does not open then you will get exactly the symptoms you describe. If there is any doubt whatsoever about the 'stat, remove it and test it. It should open fully and briskly if immersed in boiling water. The rising level in the header tank ...
by Brucey
Sat Sep 23, 2017 6:55 am
Forum: Engine - Mechanical - Electrical
Topic: M88 Exhaust question
Replies: 2
Views: 153

Re: M88 Exhaust question

please check this carefully but I suspect there is a difference in the way the tailpipes exit the rear of the silencer, to reflect the fact that the rear valance bodywork is different on euro cars , with the change occurring in 6/87

cheers
by Brucey
Sat Sep 23, 2017 6:24 am
Forum: The Saloon
Topic: Awful quiet out there these days...
Replies: 6
Views: 191

Re: Awful quiet out there these days...

In theory a rigid strut brace is better than a pivoted one. In reality a) a pivoted one provides a useful increase in stiffness and b) the stiffness of a rigid bar is often limited by the section thickness and/or the way it is mounted to the bodywork. On the former point I'd say that a pivoted brace...
by Brucey
Tue Sep 19, 2017 8:43 pm
Forum: Engine - Mechanical - Electrical
Topic: ECU has no label... Need Help
Replies: 25
Views: 2991

Re: ECU has no label... Need Help

Injectors and ECUs were matched as follows (Impedance) Bosch (last three digits) BMW (last six digits) (L) 201 273 272 9/80 - 5/82 Euro 633 & 635 (001 and 002 ECU's) (L) 201 273 272 9/81 - 9/84 US 633 (008 ECU) (L) 201 273 272 all M6 and M635 (055 and 079 ECU's) (L) 126 273 271 5/82 - 9/82 Euro 635 ...
by Brucey
Tue Sep 19, 2017 8:31 pm
Forum: Engine - Mechanical - Electrical
Topic: Completely confused as to why my engine isn't running right
Replies: 3
Views: 214

Re: Completely confused as to why my engine isn't running right

when the engine is started from cold, and when it runs WOT (as determined by the WOT contact closing) the normal 'closed loop' running conditions do not prevail in the usual way. Thus your fault sounds like there is a major error in the 'open loop' fuelling calculations. Since not all the sensors do...
by Brucey
Mon Sep 18, 2017 3:41 pm
Forum: Engine - Mechanical - Electrical
Topic: Upgrading shift linkage
Replies: 5
Views: 214

Re: Upgrading shift linkage

the sheet metal console mounts differently onto the back of the gearbox, and not many gearboxes have dual mountings, so you may not have any choice about which type of console you use. There are subtle differences in the other parts too. The linkage parts that wear are mostly similar, so in terms of...
by Brucey
Fri Sep 15, 2017 3:09 pm
Forum: Tires and Wheels
Topic: Performace tyres upgrade
Replies: 13
Views: 1525

Re: Performace tyres upgrade

.... If using 18" I'm only going 1.6" up on the factory size.... looking at the bead seat diameter, yes, but looking at the working height of the sidewall, no. You are going up 2". The metric rims have small lips; the actual diameter of the metric rim lips (which define the working height of tyre s...
by Brucey
Fri Sep 15, 2017 3:00 pm
Forum: Suspension - Steering - Brakes
Topic: E39 Suspension Swap..
Replies: 3
Views: 179

Re: E39 Suspension Swap..

one lad converted his E24 to air suspension and (he said) converted the car in such a way as the only hacking and drilling of the bodywork was the holes required for the compressed air supply. No idea what kit he used, mind, or how much custom-made stuff was involved.

cheers
by Brucey
Fri Sep 15, 2017 2:56 pm
Forum: Engine - Mechanical - Electrical
Topic: OverHeating Issue
Replies: 3
Views: 155

Re: OverHeating Issue

635CSi usually has a two-speed electric fan as well as a viscous fan. Probably (even if the viscous fan is OK) the electric fan should help out and it isn't kicking in at the right time, or at all.

cheers
by Brucey
Wed Sep 13, 2017 8:09 pm
Forum: Tires and Wheels
Topic: Steering wheel vibrations at 76mph and above.....
Replies: 9
Views: 342

Re: Steering wheel vibrations at 76mph and above.....

FWIW I think it possibly isn't from a usual cause of wheel imbalance, unless that imbalance is massive. Most imbalances excite the uprights to wobble in a certain way which is at lower speeds, usually at 60mph or less (although that could vary with the stiffness of the upper tca bushings I suppose)....
by Brucey
Wed Sep 13, 2017 7:51 pm
Forum: Engine - Mechanical - Electrical
Topic: Thermostat opening temperature
Replies: 14
Views: 367

Re: Thermostat opening temperature

the cooling circuit, if full to certain point, self-bleeds in use. You won't (easily) get all the coolant back in right away. Preferably with the car parked with the nose slightly uphill, run the engine up with the cap off the header tank, until the tstat opens. Add more coolant if required. During ...
by Brucey
Wed Sep 13, 2017 8:22 am
Forum: Suspension - Steering - Brakes
Topic: hard to diagnose brake issue
Replies: 5
Views: 158

Re: hard to diagnose brake issue

"the little clunk" only has one cause; it is the pushrod from the brake servo making contact with the back of the MC. IME this either indicates that the servo is faulty, or the MC is not returning fully. If the servo is not working properly then the brake effort will be higher than normal. If you ha...
by Brucey
Mon Sep 11, 2017 5:01 pm
Forum: Suspension - Steering - Brakes
Topic: Brake problem on my 89
Replies: 4
Views: 147

Re: Brake problem on my 89

there is a know fault with the MC getting sticky and not returning fully under spring pressure, but only once it gets warm. The pedal gets firm and the brakes drag on the front. Depending on how the compensation ports are arranged on each circuit, the binding will be on one or both front calipers. 6...
by Brucey
Mon Sep 11, 2017 9:45 am
Forum: Suspension - Steering - Brakes
Topic: ABS SENSOR / BOSCH PART NUMBER?
Replies: 75
Views: 5904

Re: ABS SENSOR / BOSCH PART NUMBER?

Not much consolation for those with zero soldering skills or decaying wiring, but I have successfully grafted ABS sensors onto wiring harnesses but soldering the wires and waterproofing the connection properly. Where did you get the right cabling harness from to do this please? from an old sensor. ...
by Brucey
Sun Sep 10, 2017 8:27 pm
Forum: Engine - Mechanical - Electrical
Topic: Thermostat opening temperature
Replies: 14
Views: 367

Re: Thermostat opening temperature

there are two different types of thermostat shape, depending on whether you have an early or late tstat housing. If you get the wrong tstat (and the wrong one looks like it fits BTW), that would be a bad thing. In the UK an 80C tstat is correct. In warmer climes some folk run a lower temperature one...
by Brucey
Sun Sep 10, 2017 8:16 pm
Forum: Engine - Mechanical - Electrical
Topic: Can I just swap motors from...
Replies: 2
Views: 142

Re: Can I just swap motors from...

BTW the RH engine mount is different on pre 6/87 motors, and the block may or may not have the right holes tapped and drilled to accept the later mount.

cheers
by Brucey
Sun Sep 10, 2017 8:13 pm
Forum: Engine - Mechanical - Electrical
Topic: Can I just swap motors from...
Replies: 2
Views: 142

Re: Can I just swap motors from...

if your build date is pre 6/87 they are very different motors and your '89 gearbox may not have the mounts on the gearbox for the crank sensors required to run the pre 6/87 Motronic. If you swap engine types it is best to keep the engine loom and management with the engine. It is possible to convert...
by Brucey
Sun Sep 10, 2017 8:02 pm
Forum: Suspension - Steering - Brakes
Topic: Converting LHD Auto To Manual But Have All RHD Parts
Replies: 4
Views: 287

Re: Converting LHD Auto To Manual But Have All RHD Parts

Hi Brucey Its shows on ETK that the LHD and RHD use the same part number am I wrong. 35311114693 well I see only LHD applications for that PN http://2009.bmwfans.info/parts/catalog/35311114693/ (click on the + buttons to see applications) IIRC the RHD pedals are all offset to one side and the LHD p...