Help Support Bigcoupe.com

Search found 168 matches

by Boggie
Tue Sep 04, 2018 8:28 pm
Forum: Suspension - Steering - Brakes
Topic: Losing Brake Pedal When Engine Running
Replies: 67
Views: 4091

Re: Losing Brake Pedal When Engine Running

one test you could easily do is to make up a short line that just connects the output ports to one another and thus blanks the MC off. If (having been bled) the pedal still sinks then you have your answer about whether the MC is faulty or not. The accumulator seems to be working fine, from your des...
by Boggie
Mon Sep 03, 2018 6:10 pm
Forum: Suspension - Steering - Brakes
Topic: Losing Brake Pedal When Engine Running
Replies: 67
Views: 4091

Re: Losing Brake Pedal When Engine Running

Thanks chaps,

I guess the only way forward is for me to buy another MC, just to see if the brand new BMW MC is faulty.
by Boggie
Sat Sep 01, 2018 6:14 pm
Forum: Suspension - Steering - Brakes
Topic: Losing Brake Pedal When Engine Running
Replies: 67
Views: 4091

Re: Losing Brake Pedal When Engine Running

Today's workshop observations: In the vague (desperate) hope that re-bleeding the system might help, I enlisted the help of my wife and followed the BMW Workshop way: Attach reservoir pressurisation kit at <2bar. Press and hold brake pedal down. Attach bleed pipe/jar and open furthest bleed nipple....
by Boggie
Sat Sep 01, 2018 2:52 pm
Forum: Suspension - Steering - Brakes
Topic: Losing Brake Pedal When Engine Running
Replies: 67
Views: 4091

Re: Losing Brake Pedal When Engine Running

Hi All, Apologies for the lack of response but I have been camping with the kids... Brucey: I will have a look for any signs of shredded rubber flecks in the oil and try to see if I can see any difference in the levels when I push the pedal with the engine running. BMW are saying two things at prese...
by Boggie
Fri Aug 24, 2018 9:55 pm
Forum: Suspension - Steering - Brakes
Topic: Losing Brake Pedal When Engine Running
Replies: 67
Views: 4091

Re: Losing Brake Pedal When Engine Running

Thanks Brucey.
I will check when I get back to the car in a couple of days.
Ian
by Boggie
Fri Aug 24, 2018 9:36 pm
Forum: Suspension - Steering - Brakes
Topic: Losing Brake Pedal When Engine Running
Replies: 67
Views: 4091

Re: Losing Brake Pedal When Engine Running

Thanks Brucey, That's pretty much what I was thinking too. The MC internal seals must be letting fluid past for the pedal to sink under pressure. However, I spoke to my local BMW dealer (whom have been supplying all my parts, including the MC) and the technicians there seem to think the culprit may ...
by Boggie
Fri Aug 24, 2018 9:48 am
Forum: Suspension - Steering - Brakes
Topic: Losing Brake Pedal When Engine Running
Replies: 67
Views: 4091

Losing Brake Pedal When Engine Running

OK, I spoke too soon on the previous thread. Got up early today to fit the wheels and in-tank pump, ready for the car's first MOT for many years. All was going well until I started the car up for the run to the MOT: I noticed that whilst I have a good solid brake pedal with the engine off, as soon a...
by Boggie
Tue Aug 21, 2018 7:35 pm
Forum: Suspension - Steering - Brakes
Topic: Brake Fluid Recommendations and Bleeding ABS
Replies: 6
Views: 657

Re: Brake Fluid Recommendations and Bleeding ABS

I have a pedal! Don't know what you guys were worried about.... :) I used a pressurised EasyBleed system at 20Lb/Sq" and bled the system as a 'normal' car. IE started at the furthest wheel, left rear then right rear, left front and so on. Initially I thought I was in trouble as the left rear was not...
by Boggie
Sat Aug 18, 2018 11:10 pm
Forum: Engine - Mechanical - Electrical
Topic: How to identify M635CSI diff casing please.
Replies: 19
Views: 1510

Re: How to identify M635CSI diff casing please.

Hi Rob,

I got a few quotes and they range between 350 and 500 quid. The guy I chose, mainly because he is only 30 minutes away, quoted me £395 including new bearings and seals. I will let you know how I get on.

Cheers,
Ian
by Boggie
Sat Aug 18, 2018 11:05 pm
Forum: Suspension - Steering - Brakes
Topic: Brake Fluid Recommendations and Bleeding ABS
Replies: 6
Views: 657

Re: Brake Fluid Recommendations and Bleeding ABS

Interesting information in the BMW E24 Manual I found a link to. It says you connect the charging system (I.E. Easy Bleed) to the MC, push and hold down the brake pedal, open the bleed valve on the furthest caliper away (presumably with bleed pipe attached and submersed), pump the brake 12 times the...
by Boggie
Sat Aug 18, 2018 9:21 am
Forum: Suspension - Steering - Brakes
Topic: Brake Fluid Recommendations and Bleeding ABS
Replies: 6
Views: 657

Re: Brake Fluid Recommendations and Bleeding ABS

Thanks Brucey! Great info. I particularly like the idea of running the car on stands (my car is currently on 4x 6 ton lorry stands) and fooling the ABS unit into thinking the wheels have locked. Will the fact that the fronts are not turning but the rears are be enough to trigger the ABS pumps or doe...
by Boggie
Fri Aug 17, 2018 7:34 pm
Forum: Engine - Mechanical - Electrical
Topic: How to identify M635CSI diff casing please.
Replies: 19
Views: 1510

Re: How to identify M635CSI diff casing please.

They are indeed. The guy doing the swap for me used to have a brand new E23/E24 LSD in his workshop but ended up using it as a donor for parts. Imagine what that diff would be worth today! I was talking to a guy in Germany who had a low mileage M5 LSD but he wanted €LOTS for it. The 745 / 750 (and p...
by Boggie
Fri Aug 17, 2018 7:28 pm
Forum: Suspension - Steering - Brakes
Topic: Brake Fluid Recommendations and Bleeding ABS
Replies: 6
Views: 657

Brake Fluid Recommendations and Bleeding ABS

Hi All, I am halfway through the M635 brake refurb. New BMW MC and all new steel lines, custom Goodridge SS hoses, rebuilt and coated calipers, EBC discs and Redstuff pads etc. The only things I will retain are the ABS unit and fluid reservoir (currently in the dishwasher with the washer bottles- do...
by Boggie
Thu Aug 16, 2018 10:13 pm
Forum: Engine - Mechanical - Electrical
Topic: How to identify M635CSI diff casing please.
Replies: 19
Views: 1510

Re: How to identify M635CSI diff casing please.

After all my concerns, it all turned out reasonably quick and easy work today. After a liberal coating of penetrating oil on the various bolts attaching my diff, I started by removing the 'new' diff from the fully-loaded rear subframe I bought. The main challenge was how to lock the diff so I could ...
by Boggie
Wed Aug 15, 2018 7:10 pm
Forum: Engine - Mechanical - Electrical
Topic: How to identify M635CSI diff casing please.
Replies: 19
Views: 1510

Re: How to identify M635CSI diff casing please.

Good call, will do.
Thanks
by Boggie
Tue Aug 14, 2018 12:38 pm
Forum: Engine - Mechanical - Electrical
Topic: How to identify M635CSI diff casing please.
Replies: 19
Views: 1510

Re: How to identify M635CSI diff casing please.

Thanks for all your help chaps, After lots of careful measuring, my M635CSI and standard 635CSI are indeed the same large case. So I am now the proud owner of a 635CSI rear subframe, complete with diff, brakes, prop etc, all in great condition. I have also found a diff specialist nearby who will swa...
by Boggie
Sun Aug 12, 2018 5:27 pm
Forum: Engine - Mechanical - Electrical
Topic: How to identify M635CSI diff casing please.
Replies: 19
Views: 1510

Re: How to identify M635CSI diff casing please.

OK. So I have been measuring the diff on my M635CSI and comparing it to your information. It is a big case diff and I have checked it is LSD (wheels rotate in the same direction), just in case someone swapped it out in the past. I am off to look at the case tomorrow evening and will check various me...
by Boggie
Tue Aug 07, 2018 8:29 pm
Forum: Engine - Mechanical - Electrical
Topic: How to identify M635CSI diff casing please.
Replies: 19
Views: 1510

Re: How to identify M635CSI diff casing please.

Brucey, you are a star.
That is exactly what I need and I am very grateful for the info. If ever we meet, I owe you a pint!
Ian
by Boggie
Tue Aug 07, 2018 4:53 pm
Forum: Engine - Mechanical - Electrical
Topic: How to identify M635CSI diff casing please.
Replies: 19
Views: 1510

Re: How to identify M635CSI diff casing please.

Thanks Brucey, I media blasted the case (and rear subframe) before the rust stabiliser coat :) The case, whilst still intact has lost most of the external webs to rust and the walls are very thin in places, the surface of the case itself is very pitted. Even with a coat of primer and stonechip it wi...
by Boggie
Tue Aug 07, 2018 8:31 am
Forum: Engine - Mechanical - Electrical
Topic: How to identify M635CSI diff casing please.
Replies: 19
Views: 1510

Re: How to identify M635CSI diff casing please.

Hi Brucey, I am going to rebuild the diff with new LSD clutch, bearings, seals etc . My case is rather rough so I have stripped it, stabilised the rust with 2 coats of RC800 and I was planning to follow this with coats of Dinitrol primer and stone chip. However, whilst this should ensure the casing ...
by Boggie
Mon Aug 06, 2018 8:26 pm
Forum: Engine - Mechanical - Electrical
Topic: How to identify M635CSI diff casing please.
Replies: 19
Views: 1510

How to identify M635CSI diff casing please.

Hi all, I have been offered a diff casing which I am.told comes from a late 635CSI. According to RealOEM this should be the same case as mine and as the pictures show it is in excellent condition, I am.considering doing a case swap. However, it is a fair distance from me and I have no evidence that ...
by Boggie
Wed Aug 01, 2018 10:39 pm
Forum: Engine - Mechanical - Electrical
Topic: Best Master Cylinder - M635CSI
Replies: 9
Views: 838

Re: Best Master Cylinder - M635CSI

Thanks Chaps, will chew that over a while....
by Boggie
Wed Aug 01, 2018 10:36 pm
Forum: Engine - Mechanical - Electrical
Topic: M635 Gear Shift Restoration
Replies: 9
Views: 946

Re: M635 Gear Shift Restoration

I have the car up on the ramps / stands to replace the complete braking system. Whilst I was under there applying penetrating oil to all the unions, I had a wiggle of the shift mechanism. The only significant play I could find was in the union between the lower gear stick and the selector rod (14). ...
by Boggie
Wed Aug 01, 2018 8:59 am
Forum: Engine - Mechanical - Electrical
Topic: Best Master Cylinder - M635CSI
Replies: 9
Views: 838

Re: Best Master Cylinder - M635CSI

Thanks Gaz,
Is it a straight swap,like for like? I.E. the same mountings and pipe fittings, no need to mod anything?
I don't suppose you have a part number to hand do you? Rummaging about the internet suggests different BMW part numbers for the 750IL but 34311156643 seems to be the right one.
Ian