Help Support Bigcoupe.com

Search found 9835 matches

by Brucey
Sat Sep 22, 2018 6:19 pm
Forum: Engine - Mechanical - Electrical
Topic: '88 Euro 635 CSi M30 engine - spark plugs
Replies: 7
Views: 105

Re: '88 Euro 635 CSi M30 engine - spark plugs

the fuel filter should (in theory) take out anything that is too large to pass through the filter screens on the back of the injectors. However that is theory only; reality is different to that and anyway crud can be generated inside the fuel lines in various ways. Stale fuel never burns so well but...
by Brucey
Sat Sep 22, 2018 6:08 pm
Forum: Engine - Mechanical - Electrical
Topic: Fuel surging/poor pick-up in tank pre-pump
Replies: 5
Views: 38

Re: Fuel surging/poor pick-up in tank pre-pump

apologies if this is b. obvious but the amount of fuel that the engine actually burns is almost irrelevant; the fuel pump is pumping it at an almost constant rate through the FPR so the same volume gets delivered to the fuel rail whether it is burnt or not. This means that only important things are ...
by Brucey
Sat Sep 22, 2018 3:55 am
Forum: The Workshop
Topic: What's the best torque wrench?
Replies: 8
Views: 1432

Re: What's the best torque wrench?

one thing that is common to all reviews is that they cannot simulate the conditions of your use. In particular if you are an amateur spanner twirler, your torque wrench will spend lengthy periods unused. This causes clicker wrenches to dry out and once that has happened if it bad enough, you may as ...
by Brucey
Sat Sep 22, 2018 3:41 am
Forum: Engine - Mechanical - Electrical
Topic: Rich running / CTS Replacement
Replies: 7
Views: 264

Re: Rich running / CTS Replacement

one check you should make is that the CTS reads the same under the bonnet as it does at the ECU connector. If it doesn't, it means the contacts are bad, probably in the plug that connects to the CTS. My guess is that the CTS connections may have been corroded to start with and worked for a while wit...
by Brucey
Sat Sep 22, 2018 3:29 am
Forum: Engine - Mechanical - Electrical
Topic: Fuel surging/poor pick-up in tank pre-pump
Replies: 5
Views: 38

Re: Fuel surging/poor pick-up in tank pre-pump

I think that what you are experiencing is quite normal with a standard (two pump) fuel delivery setup. My '87 has always done this on a hard launch if the tank isn't full enough. Early 635CSi had an extra part in the fuel system that may have reduced the chances of fuel starvation under certain circ...
by Brucey
Fri Sep 21, 2018 1:45 pm
Forum: Engine - Mechanical - Electrical
Topic: '88 Euro 635 CSi M30 engine - spark plugs
Replies: 7
Views: 105

Re: '88 Euro 635 CSi M30 engine - spark plugs

cold starts use the cold start injector on early cars and later ones go 'double duty' on the injectors during cranking; this basically guarantees that the engine will fire briefly if there is any fuel in the fuel rail even if the pressure is not enough. Bad hot starts on an 'open loop' car can indic...
by Brucey
Thu Sep 20, 2018 6:01 pm
Forum: Engine - Mechanical - Electrical
Topic: '88 Euro 635 CSi M30 engine - spark plugs
Replies: 7
Views: 105

Re: '88 Euro 635 CSi M30 engine - spark plugs

the B35 motor ought to have the LCR spark plugs in it. The DC plugs are for the B34 motor. RealOEm ain't gospel; it is for 'acquaintance purposes only', so take anything it says with pinch of salt. BTW the LCR plugs also fit the earlier B34 motor too; at least they were OK in mine..... that is what ...
by Brucey
Thu Sep 20, 2018 5:53 pm
Forum: Suspension - Steering - Brakes
Topic: Dialed in the front end
Replies: 5
Views: 90

Re: Dialed in the front end

IIRC the 25mm ARB is a an E28 M5 part and was only fitted to those cars which were fitted with Boge shocks, not bilsteins (E28 M5 came with both sorts at different times). I have always supposed that the bilsteins were stiffer in roll anyway, because they have (and use differently) an integral bump ...
by Brucey
Thu Sep 20, 2018 5:48 pm
Forum: The Workshop
Topic: Great new tool for dropped nuts (!)
Replies: 4
Views: 71

Re: Great new tool for dropped nuts (!)

http://rantchick.com/wp-content/uploads/2015/12/edward-scissorhands-film-poster.jpg coming to a cinema near you, a new drama with a happy ending; 'Poddy Magnetfingers'..... :wink: BTW an application of blu-tac to a digit can also work well for such tasks, and of course picks up things that are non-...
by Brucey
Thu Sep 20, 2018 4:00 pm
Forum: The Workshop
Topic: What's the best torque wrench?
Replies: 8
Views: 1432

Re:

I was able to make the checker accurate to with a few percent; this turned out to be more accurate than any of my torque wrenches! cheers Now that seems like a great idea. Isn't this the mechanics of a typical sliding beam weighing scale? A known weight offset a known distance? Or am I missing some...
by Brucey
Sat Sep 15, 2018 6:36 pm
Forum: Interior
Topic: Best period audio
Replies: 12
Views: 415

Re: Best period audio

IMHO the single biggest impediment to a period correct (or at least period correct-looking) audio system which actually sounds half-decent is the loudspeakers. Modern speakers are just so much better than old ones! However even the best 6x4" units lack real balls, and that is if they fit the mountin...
by Brucey
Thu Sep 13, 2018 12:04 am
Forum: Suspension - Steering - Brakes
Topic: hard to diagnose brake issue
Replies: 20
Views: 2250

Re: hard to diagnose brake issue

glad it is fixed now; the slight mystery is that the previous MC went bad so quickly. I wonder if there is a weep of PAS fluid from the servo that is getting onto the guide bushing at the back of the MC and making it swell up; I have seen this before.

cheers
by Brucey
Wed Sep 12, 2018 11:58 pm
Forum: Suspension - Steering - Brakes
Topic: Sls shock mounts
Replies: 3
Views: 95

Re: Sls shock mounts

IIRC they are different.

cheers
by Brucey
Wed Sep 12, 2018 11:52 pm
Forum: Engine - Mechanical - Electrical
Topic: Hartge head info needed
Replies: 11
Views: 328

Re: Hartge head info needed

in the simplest terms there are 'bolt on bits' and 'properly built/tuned engines'. A lot of the extra performance in the latter engines comes from having parts that match one another better than the ex-factory tolerances permit. This is done by selective matching (eg in race series where modificatio...
by Brucey
Wed Sep 12, 2018 11:40 pm
Forum: Engine - Mechanical - Electrical
Topic: Looking for some help help identifying this washer
Replies: 6
Views: 119

Re: Looking for some help help identifying this washer

a Belleville washer is strictly speaking a disc spring, i.e. a slightly conical washer. That is really a 'wave washer' although I am sure it has other names too. The crank hub washer is #6 here http://2009.bmwfans.info/parts/catalog/E24/Coupe/Europe/635CSi-M30/1985/browse/engine/belt_drive_vibration...
by Brucey
Tue Sep 11, 2018 10:08 pm
Forum: Engine - Mechanical - Electrical
Topic: Fuel but no spark
Replies: 5
Views: 103

Re: Fuel but no spark

IIRC both speed and ref sensors measure ~1000 ohms between the outside pins. If open circuit there (at the manifold brace connector) the sensor is definitely NFG. If OC at the ECU, it might be the wiring harness at fault. having spare sensors in the boot is a good idea, in case of a roadside problem...
by Brucey
Sun Sep 09, 2018 11:48 pm
Forum: Engine - Mechanical - Electrical
Topic: Weird idle on cold start
Replies: 4
Views: 144

Re: Weird idle on cold start

at 500 rpm a good alternator will struggle to run the headlights. It occurs to me that you may well have the usual problem with the throttle body; that is, the linkage is worn and the throttle plate is too far closed at idle. This will cause the ICV to open fully when the engine is cold, and it may ...
by Brucey
Fri Sep 07, 2018 8:16 pm
Forum: Engine - Mechanical - Electrical
Topic: Hartge head info needed
Replies: 11
Views: 328

Re: Hartge head info needed

IIRC you can get the CR increased/back again by skimming a B35 head when fitting it to a B34 block with B34 pistons. However this has two important knock-ons 1) that the upper timing cover housing needs to be skimmed to the same height, and cannot (easily) be used with a standard height head again a...
by Brucey
Fri Sep 07, 2018 8:01 pm
Forum: Engine - Mechanical - Electrical
Topic: How Do I Separate This Plug Housing
Replies: 5
Views: 192

Re: How Do I Separate This Plug Housing

IIRC you can buy the correct (original type) plugs and sockets from BMW. I would recommend these over an alternative for the simple reason that other types of plug/socket won't be supported by the manifold brace in the same way. Provided the wires and blade terminals are intact, it is simply a quest...
by Brucey
Thu Sep 06, 2018 11:55 pm
Forum: Engine - Mechanical - Electrical
Topic: Fritz chip for M88/3: what does it do?
Replies: 9
Views: 221

Re: Fritz chip for M88/3: what does it do?

I think the engine is conservatively tuned but it may not be conservatively mapped per se. With the right exhaust manifold fitted (to RHD spec and US spec cars) and a few other changes there is plenty of power there but the biggest change you can make is probably in the camshafts; that an engine of ...
by Brucey
Wed Sep 05, 2018 11:43 pm
Forum: Engine - Mechanical - Electrical
Topic: Fritz chip for M88/3: what does it do?
Replies: 9
Views: 221

Re: Fritz chip for M88/3: what does it do?

the chip will have been developed using just one or two engines. The change in the redline is obvious and (like Sharkfan says) not necessarily a good idea on an old engine. I'd want the engine to be in top condition and I'd probably want a new (higher rated) crank pulley hub too. Whether the other (...
by Brucey
Wed Sep 05, 2018 11:52 am
Forum: Engine - Mechanical - Electrical
Topic: Weird idle on cold start
Replies: 4
Views: 144

Re: Weird idle on cold start

you may be experiencing a simple lack of volts somewhere; if the alternator doesn't start charging straight away (which it might not after a start at low engine revs for all kinds of reasons) then the engine will be trying to run on 12V or less rather than 13.8 volts. A dodgy connection somewhere ma...
by Brucey
Wed Sep 05, 2018 11:43 am
Forum: Engine - Mechanical - Electrical
Topic: 1984 633CSI with chipped 0261-200-008 hesitates above 75F
Replies: 3
Views: 164

Re: 1984 633CSI with chipped 0261-200-008 hesitates above 75F

I suspect that the ECU may have some dodgy joints in it still, or that there is a basic ignition system fault of some kind. I'm not sure how to best to check it exactly if the fault only happens under load but if you can check for spark/injector function during the fault that would be a start. Needl...
by Brucey
Wed Sep 05, 2018 11:31 am
Forum: Suspension - Steering - Brakes
Topic: Losing Brake Pedal When Engine Running
Replies: 26
Views: 626

Re: Losing Brake Pedal When Engine Running

I did spend some time tonight composing an article about my abs controller with details but when I pressed submit it seems to have disappeared !! Don't you just love computers! I think what happens is that the submission page/form your are typing into 'times out' and (depending on some combination ...
by Brucey
Wed Sep 05, 2018 11:15 am
Forum: Suspension - Steering - Brakes
Topic: Losing Brake Pedal When Engine Running
Replies: 26
Views: 626

Re: Losing Brake Pedal When Engine Running

.... but the spark plugs I bought were incredibly good fakes. Almost indestinguisable from the genuine items. It was only when I bought a new set from a local motor spares shop that I spotted the font of the part number stamped on the side was different. I sent one to NGK and they confirmed it to b...