The little V8 that could: 530i Daily Log

[B C]

Don't rule out the proportioning valve

[Jdesign]

What style bleeder are you using?

[YoungCR]

Motive power bleeder. I’ve only used it on this car so far and never had any luck with it even before these current issues though.

[straight6pwr]

i've used that style bleeder attached to the brake fluid res on my e34 and it worked fine.

thinking about how a MC works, wouldn't it be hard for it to fail in a way that would block fluid flow? i suppose the ports could get blocked by chucks of the seal if it was falling apart, but that would result in a rock hard pedal, as the cylinder would be trying to push the fluid out, but it would be just compressing it. the normal mode of failure is bad (leaking) seals causing the opposite problem of no pressure.

i'd think the ABS unit would be more suspect. I've read online about procedures to hot wire the unit to actuate the gates, or possible to tap the unit to try and unstick the gates, but I can't find any to reference at the moment.

B C said:

Don't rule out the proportioning valve

i dont believe the e34 has a valve. the abs unit controls proportioning.

[patsbimmer1]

Take it to a gravel parking lot and slam the brakes about 15 to 20 to activate abs.  You have now completed an abs bleed.

[YoungCR]

patsbimmer1 said:

Take it to a gravel parking lot and slam the brakes about 15 to 20 to activate abs.  You have now completed an abs bleed.

I forgot about this trick. Luckily there is plenty of gravel driveway next door.

[YoungCR]

The mild winter weather got me motivation to order parts from @patsbimmer1 last week and now winter weather has kicked back in since delivery . Ordered 540i rear calipers with brackets this time, ECS SS braided lines as the FCP kit I bought doesn't include the hoses for the rear calipers??. Also got both idler pulleys and a new V belt just in case as nobody stocks these locally. Yes this is all simple stuff as long as I can presumably get the ABS pump bled once the parts are on. The bigger task is really getting the car out from the middle of my storage unit. 

[YoungCR]

After some spring cleaning in the storage unit yesterday, I finally have a workspace so to speak. Pulled drivers rear brakes off and the e-brake expanding lock just falls out and is mangled . It bound up some how just moving the car around storage and on/off the trailer so that needs a replacement. They are $50 new from the dealer so I'm gonna make a trip to Gibson's finally to get some quality used parts along with some adjuster screws as I probably threw out the old ones thinking the brake hardware kit would come with replacements which the Febi kit doesn't.

[YoungCR]

So I've had this back on the road for 3 weeks tomorrow! I had pulled it out of storage to rearrange some things and noticed there was some slight brake pressure. Before I drove it home I installed the new 540i rear calipers with centric blanks and akebono pads. Still didn't bleed well though so I took it to the new sub division by me and locked the brakes up a few times to activate ABS. Worked great but I'm still gonna do another round of bleeding as I feel it could be better yet.

Other than that, after a few Italian tune ups the valve tick went away. Of course there's a laundry list of to do but it's been a blast ripping around. Objectivly this is a horrible car but it's more fun around town then the 540i.

[damnboy037]

I like the color!

[YoungCR]

Time to get summers on this pig. Anybody have suggestions or a hook up for the fox valley area? I have some used 16" tires I'll need mounted, think I'm gonna put them on 16" E38 style 5's.