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by Brucey
Wed Aug 15, 2018 5:01 pm
Forum: Suspension - Steering - Brakes
Topic: Hydro brake mystery
Replies: 36
Views: 603

Re: Hydro brake mystery

hey Martyn, that was good work with the PAS rebuild; shame it took so many goes to get a good pump. Philip, from your description it sounds like the system is losing pressure from the accumulator more quickly than normal. This is almost certainly leaking past one of the valves in the system. Normall...
by Brucey
Wed Aug 15, 2018 4:42 pm
Forum: Engine - Mechanical - Electrical
Topic: How to identify M635CSI diff casing please.
Replies: 12
Views: 221

Re: How to identify M635CSI diff casing please.

don't use a ratchet spanner to break the bolts on the top of the diff; use a conventional ring spanner with a cheater bar on it instead. You may even find that you need to sacrifice a cheap ring spanner by using it as a 'slogging spanner'. By all means use the ratchet spanner to wind the bolts out a...
by Brucey
Tue Aug 14, 2018 12:20 am
Forum: Suspension - Steering - Brakes
Topic: Hydro brake mystery
Replies: 36
Views: 603

Re: Hydro brake mystery

the fact that when you get the noise you lose the PAS means the belt is slipping and the pump is not turning. It could be as simple as the belt needing to be tensioned (it needs to be pretty tight) or the belt could be the wrong one (right length, wrong section) which means that no matter how tight ...
by Brucey
Sat Aug 11, 2018 10:41 pm
Forum: The Saloon
Topic: What did you do to your E24 today?
Replies: 715
Views: 104948

Re: What did you do to your E24 today?

aerosol SFG (semi-fluid grease) is the stuff for this (and throttle linkage parts)

cheers
by Brucey
Thu Aug 09, 2018 4:45 pm
Forum: Engine - Mechanical - Electrical
Topic: location of fuel pump relay on 1988 m6
Replies: 2
Views: 115

Re: location of fuel pump relay on 1988 m6

under the dash, near the ECU. The ECU instructs the fuel pump to run. Without the correct inputs to the ECU, the fuel pump relay won't ever close. The fuel pump runs in cranking and in running only. ECU inputs include crank sensors and a 'start' signal that is derived from the starter motor via a sk...
by Brucey
Wed Aug 08, 2018 8:03 am
Forum: Engine - Mechanical - Electrical
Topic: help identifying vacuum hose
Replies: 12
Views: 164

Re: help identifying vacuum hose

ah, air not water..... No wonder you didn't find it before, it is on a page in the ETK that is labelled 'water hoses' or somesuch…. :wink:

cheers
by Brucey
Tue Aug 07, 2018 8:08 pm
Forum: Engine - Mechanical - Electrical
Topic: Won't Idle Low and Hesitates at High RPM
Replies: 5
Views: 167

Re: Won't Idle Low and Hesitates at High RPM

the TB setting procedure can be found in Haynes, BMW, and other manuals. If the TB is set too far closed (it tends to close itself through wear BTW and needs resetting quite often) then the idle control will have to work overtime to keep the engine running and may stall when the PAS is used etc. If ...
by Brucey
Tue Aug 07, 2018 7:59 pm
Forum: Engine - Mechanical - Electrical
Topic: How to identify M635CSI diff casing please.
Replies: 12
Views: 221

Re: How to identify M635CSI diff casing please.

some obvious differences in a large case diff are - the bearing retainers - the bolt pattern in the rear cover - the width across the drive flanges (or bearing retainers) - the length from the input flange to the output flange you may find this photo useful http://www.nmia.com/~dgnrg/diffs.jpg cheers
by Brucey
Tue Aug 07, 2018 3:31 pm
Forum: Engine - Mechanical - Electrical
Topic: How to identify M635CSI diff casing please.
Replies: 12
Views: 221

Re: How to identify M635CSI diff casing please.

"not much extra work". Hmm. You need to set up the preload on the front bearing using a crush washer and also to make sure the contacts in the gear teeth are correct. Both procedures are a bit tricky (and can scrap parts if they go wrong) and I would not choose to undertake them simply for the sake ...
by Brucey
Mon Aug 06, 2018 9:18 pm
Forum: Engine - Mechanical - Electrical
Topic: help identifying vacuum hose
Replies: 12
Views: 164

Re: help identifying vacuum hose

I think it has water going through it, actually, but yes it is part of the system that allows more fuel and air into the engine when it is cold. Note that this part is only used on l-jet cars up to 1979. Including date, model and regional variations here are at least twenty different specifications ...
by Brucey
Mon Aug 06, 2018 9:15 pm
Forum: Engine - Mechanical - Electrical
Topic: How to identify M635CSI diff casing please.
Replies: 12
Views: 221

Re: How to identify M635CSI diff casing please.

what is wrong with your extant case? If it is just grotty-looking, it is far easier to fix that than put the internals in a new case.

cheers
by Brucey
Mon Aug 06, 2018 3:59 pm
Forum: Engine - Mechanical - Electrical
Topic: help identifying vacuum hose
Replies: 12
Views: 164

Re: help identifying vacuum hose

that is weird, I posted a reply to this thread yesterday and it seems to have disappeared into the ether.

IIRC it seems to be part #13 on this diagram?

http://2009.bmwfans.info/parts/catalog/ ... r_hoses-3/

cheers
by Brucey
Mon Aug 06, 2018 12:25 am
Forum: Tires and Wheels
Topic: RC090's on a series one .
Replies: 10
Views: 217

Re: RC090's on a series one .

Far from me to argue against Brucey but ET10 wheels for any same width will sit 10mm further OUT than ET20... that is what causes the rubbing, IIRC (it certainly did with the wheels I had in an E12 based chassis); the outer edge of the tyre rubs in the back of the wheelarch, and the further away it...
by Brucey
Mon Aug 06, 2018 12:15 am
Forum: Engine - Mechanical - Electrical
Topic: IACV issues?
Replies: 2
Views: 72

Re: IACV issues?

probably you have got multiple issues with your engine setup. A very common fault with the ICV is that it becomes sticky in operation, which can lead to it jamming open. Clean it and make sure that the moving part, er, moves, and moves freely. At least if it is jamming open it is probably trying to ...
by Brucey
Sun Aug 05, 2018 11:58 pm
Forum: Cars and Parts wanted
Topic: BBS RC 009 UK
Replies: 9
Views: 40282

Re: BBS RC 009 UK

mad thought; is it possible to fit new bells (rim parts) onto the odd damaged one you have/had?

Dunno if these would fit...?

https://www.ebay.co.uk/itm/17-BBS-RC-20 ... SwxNxbYjgW

cheers
by Brucey
Sun Aug 05, 2018 11:56 am
Forum: Cars and Parts wanted
Topic: BBS RC 009 UK
Replies: 9
Views: 40282

Re: BBS RC 009 UK

by Brucey
Sun Aug 05, 2018 11:24 am
Forum: Engine - Mechanical - Electrical
Topic: SSSquid Tuning custom M30B34 chip about to install
Replies: 17
Views: 451

Re: SSSquid Tuning custom M30B34 chip about to install

if you are seeing single figures from that V8 it can't be too bad.

cheers
by Brucey
Sat Aug 04, 2018 11:14 pm
Forum: Tires and Wheels
Topic: RC090's on a series one .
Replies: 10
Views: 217

Re: RC090's on a series one .

doesn't a reduced offset result in more danger of rubbing, not less, on series 1 cars? They lack the double-knuckle arrangement of series two cars and this means the upright rotates around a fixed pivot (rather than a virtual pivot that moves around as per the series 2 cars). My impression was that ...
by Brucey
Sat Aug 04, 2018 11:04 pm
Forum: Engine - Mechanical - Electrical
Topic: SSSquid Tuning custom M30B34 chip about to install
Replies: 17
Views: 451

Re: SSSquid Tuning custom M30B34 chip about to install

I am slightly confused; I thought we were discussing an M30B34 engine as per your first post and the thread title (presumably in an E24). If an auto, this would have a (4 speed) ZP-4HP22-EH box behind it, if built after a certain date. The EH (electro-hydraulic) variant has a control knob that selec...
by Brucey
Fri Aug 03, 2018 10:46 pm
Forum: Tires and Wheels
Topic: RC090's on a series one .
Replies: 10
Views: 217

Re: RC090's on a series one .

235/45-17 tyre is bigger all round (width and diameter) so if 225/45-17 rubbed on wheels with the same offset and width, the new ones will do too.

FWIW I had 235mm tyres on ET15 rims on a series one car and they rubbed in the back of the wheel arches too.

cheers
by Brucey
Fri Aug 03, 2018 10:40 pm
Forum: Suspension - Steering - Brakes
Topic: Massive vibration under heavy braking
Replies: 25
Views: 1533

Re: Massive vibration under heavy braking

Waud wrote:
Sat Jul 28, 2018 7:17 pm
Hi OnTheFritz,
just a thought, your photo at bottom of your posts shows an e24 with, i think, e38 wheels. If this is the case the hubs on the e24 are smaller than the centre holes in the e38 wheels and require spacer shims. ..
you are thinking of E39 wheels.

cheers
by Brucey
Fri Aug 03, 2018 10:14 am
Forum: Suspension - Steering - Brakes
Topic: Brake light warning light
Replies: 30
Views: 6049

Re: Brake light warning light

sounds like you still have a dodgy connection?

cheers
by Brucey
Fri Aug 03, 2018 10:07 am
Forum: Engine - Mechanical - Electrical
Topic: SSSquid Tuning custom M30B34 chip about to install
Replies: 17
Views: 451

Re: SSSquid Tuning custom M30B34 chip about to install

maybe the programming of the gearbox varies with build date or something. On my EH autobox car, the 1-2 shift doesn't seem to be particularly slow, unless you have barely any throttle applied, in which case you are by definition not in any hurry. If you are in a hurry, in my car this shift happens w...
by Brucey
Thu Aug 02, 2018 8:50 pm
Forum: Engine - Mechanical - Electrical
Topic: SSSquid Tuning custom M30B34 chip about to install
Replies: 17
Views: 451

Re: SSSquid Tuning custom M30B34 chip about to install

OK thank you for clarifying that your custom chip is custom in only one respect. As I explained earlier there are small gains to be made over standard for all kinds of reasons, mainly to do with how petrol was then and how it is now. A lot of the anomalies you describe are attributable to things tha...
by Brucey
Thu Aug 02, 2018 7:48 pm
Forum: Engine - Mechanical - Electrical
Topic: Won't Idle Low and Hesitates at High RPM
Replies: 5
Views: 167

Re: Won't Idle Low and Hesitates at High RPM

on a 628 CSi sparks are generated by the L-jet ECU, the ignition mapping unit, the amplifier and the coil, and distributed to each cylinder by the, er distributor. An intermittent ignition fault on one cylinder only has to be the plug, the plug lead, or some fault in the distributor. Hesitation at ~...