Search found 180 matches

by Robert Bondi
Thu Apr 09, 2020 3:07 am
Forum: Tech Forum
Topic: Motor Mounts
Replies: 5
Views: 39

Re: Motor Mounts

canada karl wrote:
Mon Apr 06, 2020 7:44 am
Thanks for the info Robert. :) Are there still E12's at the wreckers in Austin Texas?
No, not that I know of. It's getting pretty sad.
by Robert Bondi
Mon Apr 06, 2020 1:35 am
Forum: Tech Forum
Topic: Aux Fan
Replies: 9
Views: 71

Re: Aux Fan

Start with checking the grounds if your temp needle is flickering. These cars were notorious for running hot, even when new. Check the cooling system FAQ that covers everything I did to make the car reliable for a Texas climate. My Euro 528 has no aux fan and no A/C....yet. Two things trigger the au...
by Robert Bondi
Sun Apr 05, 2020 5:06 pm
Forum: Tech Forum
Topic: Motor Mounts
Replies: 5
Views: 39

Re: Motor Mounts

Ditto on Mike's input. This is one of several seemingly hard jobs that can be done if you got some extra jacks on hand and are careful. For supporting the engine, I like using some cinder blocks and have a lot of wood on hand. The wood helps on spreading the pressure from the jack, but it's also use...
by Robert Bondi
Sun Apr 05, 2020 4:52 pm
Forum: Tech Forum
Topic: ballast resistor with conventional ignition
Replies: 10
Views: 467

Re: ballast resistor with conventional ignition

After melting a second set of points, I stepped back and did some more research. A post from a few years back from Mike W. led me to look at the starter more closely as the wiring problem. One issue is having a polarity problem at the starter as apparently there are different terminal configurations...
by Robert Bondi
Tue Mar 10, 2020 1:12 am
Forum: Tech Forum
Topic: 1976 BMW 530i "Eleanor" rebuild project
Replies: 59
Views: 2903

Re: 1976 BMW 530i "Eleanor" rebuild project

As far as polishing the manifold and runners, I've been told by many it's a sand casting and therefore has a lot of voids and pits throughout, which prevents achieving a mirror-like finish. When I rebuilt my engine a few years ago, I simply had many of those aluminum pieces glass-bead blasted which ...
by Robert Bondi
Mon Mar 09, 2020 1:20 am
Forum: Tech Forum
Topic: ballast resistor with conventional ignition
Replies: 10
Views: 467

Re: ballast resistor with conventional ignition

Some follow ups here: I took some measurements and found resistance wasn't useful in confirming anything about polarity for the low voltage coil terminals. I measured high voltage center to the low voltage terminals and found 8.8 kOhm in both cases on the 6V coil and found 14 kOhm in both cases on t...
by Robert Bondi
Sat Feb 22, 2020 7:22 pm
Forum: Tech Forum
Topic: 1976 530i ECU internal circuit boards view
Replies: 7
Views: 353

Re: 1976 530i ECU internal circuit boards view

Hey Mike,
Great pics. Good to see the FAQs are still getting used so many years later. Scott Stewart pioneered the conversion; I added the visuals after doing the project myself. Yeah, the E12 ECU is a basically a simple analog computer in a very large box by today's standards.
by Robert Bondi
Wed Feb 19, 2020 12:33 am
Forum: Tech Forum
Topic: ballast resistor with conventional ignition
Replies: 10
Views: 467

Re: ballast resistor with conventional ignition

Awesome schematic, Mike! I particularly like seeing the inside of the coil which both explains 3 terminals, rather than 4 for a basic transformer, with the common node inside and the common node also creates asymmetry and explains a polarity difference for the low voltage terminals with respect to t...
by Robert Bondi
Tue Feb 18, 2020 4:23 am
Forum: Tech Forum
Topic: ballast resistor with conventional ignition
Replies: 10
Views: 467

Re: ballast resistor with conventional ignition

Mike, Thanks for bouncing some ideas. It's definitely a 12V system, but I agree that the polarity issue is probably the most likely cause of my melted wires. In ordering that new 12V coil, I had checked that the Euro 528 coil and U.S. 530i coil are the same part number and I further confirmed that w...
by Robert Bondi
Mon Feb 17, 2020 4:15 am
Forum: Tech Forum
Topic: ballast resistor with conventional ignition
Replies: 10
Views: 467

Re: ballast resistor with conventional ignition

Another detail. Old coil had blk/red wire on the negative terminal and that was a running arrangement. I kept blk/red on the negative terminal on the new coil. All the manual references I have show blk/red on the positive terminal. Perhaps reversed polarity was worse than the attempt without ballast...
by Robert Bondi
Sun Feb 16, 2020 3:00 pm
Forum: Tech Forum
Topic: ballast resistor with conventional ignition
Replies: 10
Views: 467

ballast resistor with conventional ignition

Slow going on the Euro 528 project car...Been doing regular drives and dealing with a little bit of Solex 4A1 carb variable behavior. Latest issue is unreliable starting and troubleshooting has isolated it back to the high voltage terminal of the coil and no spark. I'm clearly dealing with some non-...
by Robert Bondi
Tue Dec 24, 2019 1:54 pm
Forum: Tech Forum
Topic: Proper coolant (or newer types that protect iron blocks)???
Replies: 9
Views: 611

Re: Proper coolant (or newer types that protect iron blocks)???

I've been running the Prestone long-life orange formula since around 1999. It's also an OAT or HOAT forumulation. I've been very happy with it and basically run it in all my vehicles. Engine was rebuilt in that span too and everything looked pretty good on the inside. Since it's free of silicates, y...
by Robert Bondi
Sun Jul 07, 2019 7:12 pm
Forum: Tech Forum
Topic: Where's the best place to buy.....
Replies: 2
Views: 475

Re: Where's the best place to buy.....

I used to frequent BMP, then BavAuto for common maintenance stuff. They're now both extinct. I agree with Mike on Autohaus AZ and RockAuto for common stuff. You might also check Pelican Parts (well liked by E28 guys I know) and ECS Tuning. ECS sort of paired up with BavAuto as BavAuto closed and wer...
by Robert Bondi
Sun Jul 07, 2019 7:02 pm
Forum: Tech Forum
Topic: Swapping combo relay from a 76 530i to a 77 530i ?
Replies: 5
Views: 669

Re: Swapping combo relay from a 76 530i to a 77 530i ?

I think it would work, but that's a guess. I suspect the black plastic case is more an indicator of much more recent manufacturing than a different part and possibly also a part number supercede to explain that difference too. I can tell you my 77 530i originally had a metal case combo relay too. It...
by Robert Bondi
Sun Jul 07, 2019 6:46 pm
Forum: Tech Forum
Topic: No click or fuel pump hum when AFM flap is opened?
Replies: 6
Views: 783

Re: No click or fuel pump hum when AFM flap is opened?

I also like to jump pins 36 and 39 on the AFM. That bypasses the AFM flap fuel cutoff and you can
test fuel pump operation without starting car. Pump will run with ignition in "ON" position before cranking. Combo relay is certainly a common culprit for your problem, as discussed.