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by Brucey
Sat Dec 07, 2019 11:56 am
Forum: Engine - Mechanical - Electrical
Topic: M6 Sputter under load when cold
Replies: 1
Views: 39

Re: M6 Sputter under load when cold

other than being a potential site for air leaks (for unmetered air because it has hoses and potential leak sites) the ICV cannot affect running under load; all it does (even if it fails entirely) is affect how much air goes through the throttle butterflies and how much through the ICV; it should all...
by Brucey
Thu Dec 05, 2019 3:04 pm
Forum: Interior
Topic: carpet under AC unit
Replies: 0
Views: 42

carpet under AC unit

the almost inevitable tin worm has recently necessitated some welding in the footwell area, and that meant pulling the carpet back. I was vaguely concerned by the fact that it took some force to pull the carpet out from beneath the AC unit. Needless to say I now can't get it back in again. Is there ...
by Brucey
Wed Dec 04, 2019 11:36 pm
Forum: Engine - Mechanical - Electrical
Topic: Thermostat and Pulse Generator(camshaft sensor)??
Replies: 6
Views: 82

Re: Thermostat and Pulse Generator(camshaft sensor)??

As before, this sensor is not needed for the engine to run. It simply reports it's signal to the diagnostic plug. yep, you can take this sensor and chuck it in the bin if you like; it only does anything useful when (if) someone plugs in a (now antique) BMW service computer into your car. Re the the...
by Brucey
Wed Dec 04, 2019 11:26 pm
Forum: My Project
Topic: Two Sixers, what to do!
Replies: 3
Views: 76

Re: Two Sixers, what to do!

welcome aboard! First the good news; you have a couple of nice cars there. Now for the bad news; builds after 5/82 are (mechanically) E28 based and builds prior to that date are E12 based; the cars may look the same but nearly every part is different and I think you have one of each. Actually you ma...
by Brucey
Sun Dec 01, 2019 1:52 pm
Forum: Engine - Mechanical - Electrical
Topic: 85' 635csi | Cranks but no Spark
Replies: 15
Views: 203

Re: 85' 635csi | Cranks but no Spark

Checked the reference & speed sensors which have both seen better days. Neither offered up any readings on the ohm meter as pointed out in the above pdf/manual. I checked the harness side of the car on the sensors and they are getting power. I did replace the rotor, which was also ready for the bin...
by Brucey
Fri Nov 29, 2019 9:24 pm
Forum: Engine - Mechanical - Electrical
Topic: Surging Idle L-Jet m30b32
Replies: 2
Views: 72

Re: Surging Idle L-Jet m30b32

most likely there is a big air leak and/or fixed air bypass setting is wrong, and when the engine is warm, there is too much air getting into the engine, such that the overrun fuel cutoff starts to kick in (which happens anytime you have a closed throttle and the engine speed is above a certain spee...
by Brucey
Fri Nov 29, 2019 8:39 am
Forum: Engine - Mechanical - Electrical
Topic: 85' 635csi | Cranks but no Spark
Replies: 15
Views: 203

Re: 85' 635csi | Cranks but no Spark

NB when you say 'checked' you mean with a meter? If so this is 'necessary but not sufficient' . Feeds need to be checked under load if you want to be sure of their integrity. The typical failure mode of the main relay is that it still clicks, still tests OK with DVM, but has an iffy contact inside i...
by Brucey
Wed Nov 27, 2019 12:11 am
Forum: Exterior
Topic: stuck door!
Replies: 8
Views: 887

Re: stuck door!

after much wailing and gnashing of teeth I finally managed to gain entry, without breaking anything. I would never have guessed at the correct shape rod unless I have another door internal to look at, and furthermore when used as intended, it turned out the rod changed shape, so that it needed reset...
by Brucey
Sat Nov 23, 2019 9:13 am
Forum: Engine - Mechanical - Electrical
Topic: M6 E24 Engine cuts suddenly
Replies: 2
Views: 104

Re: M6 E24 Engine cuts suddenly

it could be one of several things but this behaviour is exactly consistent with a failing main relay.

cheers
by Brucey
Fri Nov 22, 2019 8:38 pm
Forum: Engine - Mechanical - Electrical
Topic: More sensors - which ones are these...?
Replies: 6
Views: 221

Re: More sensors - which ones are these...?

a good way of testing for air leaks is to (carefully) introduce a fuel external to the inlet manifold at tickover; this might be lighter fuel or gas from a cartridge; anything that you can direct to a specific location really. When the fuel is sucked in a misfire may disappear and the at the least t...
by Brucey
Fri Nov 22, 2019 2:51 pm
Forum: Engine - Mechanical - Electrical
Topic: More sensors - which ones are these...?
Replies: 6
Views: 221

Re: More sensors - which ones are these...?

one of the wires will be the oil level sensor but the others I'm not sure about. The sensors that make your B35 engine run are a) the front crank sensor and b) the cam phase sensor (on one of the plug leads) these don't normally go bad when the engine warms up but you never know. Some common causes ...
by Brucey
Tue Nov 19, 2019 11:29 pm
Forum: Engine - Mechanical - Electrical
Topic: missing sensor?
Replies: 2
Views: 138

Re: missing sensor?

standard feature on that vintage of 6er; if you find out what it is for do let us know!

cheers
by Brucey
Tue Nov 19, 2019 11:25 pm
Forum: Engine - Mechanical - Electrical
Topic: Damaged sensor ID - Thermo time?
Replies: 2
Views: 134

Re: Damaged sensor ID - Thermo time?

you have got no 7th injector and no thermotime switch on an E24 with the M30B35 motor fitted (~7/87 onwards). Check the wire colours against the wiring diagram to be sure but I think the two contacts in that fitting are a) the sender for the temperature gauge in the dashboard and b) the switch for a...
by Brucey
Tue Nov 19, 2019 11:14 pm
Forum: Engine - Mechanical - Electrical
Topic: More sensors - which ones are these...?
Replies: 6
Views: 221

Re: More sensors - which ones are these...?

Your photos are not super clear (not least because they are on photophuckit and to the rest of the world have a stupid and highly obtrusive watermark on them) . If you want to get familiar with your motor there are three ways you can do it 1) Look in an online ETK (realoem or BMWfans perhaps); this ...
by Brucey
Mon Nov 18, 2019 3:09 am
Forum: Engine - Mechanical - Electrical
Topic: No fuel injector pulse?
Replies: 5
Views: 184

Re: No fuel injector pulse?

the speed and position sensors give different voltages when you use a DVM because the former creates a continuous series of pulses and the latter generates a single pulse per crank revolution. If you want to test them properly then you ought to use an oscilloscope, but that they measure the correct ...
by Brucey
Sun Nov 17, 2019 2:29 pm
Forum: Engine - Mechanical - Electrical
Topic: No fuel injector pulse?
Replies: 5
Views: 184

Re: No fuel injector pulse?

IIRC the 008 ECU was used on non-cat motronic 633CSi from sept 1981. Maybe you answered this in a previous post but -when cranking, have you got the 'start' signal at pin 4 on the ecu…? If not this disables the motronic system; I can't remember offhand if it disables both spark and fuel or just one ...
by Brucey
Sat Nov 16, 2019 5:45 pm
Forum: Engine - Mechanical - Electrical
Topic: Battery drain issue solved!
Replies: 2
Views: 166

Re: Battery drain issue solved!

series 1 cars have a different set of problems; series 2 cars usually have a ~60mA parasitic drain from the circuit that charges the SI batteries.

cheers
by Brucey
Fri Nov 15, 2019 9:57 pm
Forum: Engine - Mechanical - Electrical
Topic: Electric fan - radiator cooling
Replies: 2
Views: 151

Re: Electric fan - radiator cooling

if you unplug the wires from the sensor (which I think is on the RHS of the radiator and has three wires on your car; earlier ones are different) you can connect the wires using a jumper and the fan should work at both speeds. Alternatively you can put a jumper in place of the relay (s) and test the...
by Brucey
Thu Nov 14, 2019 11:57 pm
Forum: Interior
Topic: Heater valve repair
Replies: 19
Views: 585

Re: Heater valve repair

https://www.amazon.com/MTC-3065-Mercede ... B00BCR2Y0E

shows as $16.83 plus $5.14 shipping, no taxes, when I enter 'ship to Australia'.

cheers
by Brucey
Thu Nov 14, 2019 1:53 pm
Forum: My Project
Topic: Electrifying my '85 635CSi Euro
Replies: 28
Views: 787

Re: Electrifying my '85 635CSi Euro

thanks for the reply. Yes it certainly is challenging and there are complex issues. FWIW if there is a bad fuel smell from the exhaust when the car starts this is usually caused by overfuelling when the car is cold. One of my mad plans is to have momentary action switches to run the fuel pump and ma...
by Brucey
Thu Nov 14, 2019 9:34 am
Forum: Interior
Topic: Heater valve repair
Replies: 19
Views: 585

Re: Heater valve repair

IIRC the 'no heat at speed' symptom is usually a small leak in the diaphragm. At low engine speeds the valve can work even if there is a little damage, but at higher (engine) speed the flow conditions in the valve change and any tiny fault is more apparent. FWIW the valve works on the pilot principl...
by Brucey
Wed Nov 13, 2019 10:59 am
Forum: Interior
Topic: Heater valve repair
Replies: 19
Views: 585

Re: Heater valve repair

my POV on this is that the MTC kit is so cheap it is worth a punt. You definitely need to reassemble the valve with all the same parts as it came with originally, which means yes you need the washers etc if the kit comes without them. I've seen more valves that have been 'repaired' badly than I have...
by Brucey
Wed Nov 13, 2019 10:44 am
Forum: My Project
Topic: Electrifying my '85 635CSi Euro
Replies: 28
Views: 787

Re: Electrifying my '85 635CSi Euro

I appreciate your point of view but I didn't post my project here to get into a debate about justifying electrical transportation. I've been involved with electric cars since the early nineties and have heard every argument similar to what you have made and many others. I have no idea why you would...
by Brucey
Tue Nov 12, 2019 11:50 pm
Forum: My Project
Topic: Electrifying my '85 635CSi Euro
Replies: 28
Views: 787

Re: Electrifying my '85 635CSi Euro

in terms of saving the planet, maybe it would have been better to have started with a 6er that was more of a basket case. OK those parts you don't need will hopefully see another life, but even so. If you only drive 25mph on your commute then probably there is another way of doing it (like cycling) ...
by Brucey
Mon Nov 11, 2019 11:19 am
Forum: Engine - Mechanical - Electrical
Topic: Heater Won't Blow Hot
Replies: 4
Views: 194

Re: Heater Won't Blow Hot

the first thing I would do to check that the heater valve is signalled to be 'open' when you want it to be hot. With the ignition on the valve should click (not very loudly, you won't hear it inside the car) when the heater dial is turned between hot and cold. If this doesn't happen there is a fault...