Search found 210 matches

by Lock
Sun Mar 22, 2020 1:26 pm
Forum: Tech Forum
Topic: Valvar 30A Relays // 1 364 986
Replies: 3
Views: 94

Re: Valvar 30A Relays // 1 364 986

Eric, I can share some of the knowledge I have of my '79 electrical system. The stage I and stage II relays (in my car, they're tacked onto the outside of the fuse box like an afterthought) are triggered from the 90C and 99C temp sensors in the radiator, and spin the front aux fan at 50% via its res...
by Lock
Sun Mar 22, 2020 12:28 pm
Forum: Tech Forum
Topic: Vapor Blasting
Replies: 9
Views: 647

Re: Vapor Blasting

That looks great Eric, the engine is now as shiny as your aluminum radiator.

And the spin-on fan is a worthwhile upgrade hey. No more draining and removing the radiator just to remove the fan to get access to the front.
by Lock
Sat Feb 29, 2020 1:32 am
Forum: Tech Forum
Topic: 1976 BMW 530i "Eleanor" rebuild project
Replies: 56
Views: 2609

Re: 1976 BMW 530i "Eleanor" rebuild project

One great thing about this thread is the amount of "you can do this yourself" information. I did not know you could sand crank journals at home. I thought polishing cranks was confined to being one of those dark arts that could only be done by expensive machines. Not something that just requires at ...
by Lock
Sat Feb 29, 2020 12:40 am
Forum: Tech Forum
Topic: 1978 e12 trunk sunroof motor installation
Replies: 1
Views: 148

Re: 1978 e12 trunk sunroof motor installation

I can't see you pictures, but I can say when I did mine a few years ago, I just swapped the motor itself in, not the whole assembly. As I recall the motor is bolted in and connects with a keyed rubber/plastic drive connector, so once you unbolt it it will separate and you can install the new motor a...
by Lock
Tue Feb 11, 2020 9:52 pm
Forum: Tech Forum
Topic: 1981 bmw e12
Replies: 9
Views: 462

Re: 1981 bmw e12

Sent you a PM but the ECU relies on the ignition circuit working, so focus on that first. Might be the coil failed, distributor sensor failed, green sensor wire broken, wiring somewhere else is broken, or the ignition unit has failed (most common). Trace that you get voltage from the distributor sen...
by Lock
Mon Feb 10, 2020 12:47 pm
Forum: Tech Forum
Topic: Ignition Tumbler
Replies: 5
Views: 418

Re: Ignition Tumbler

An update on my experience - don't buy the cheaper "OEM Genuine" white plastic ignition switches, they are not genuine and they're trash. The wiring is also cheap and thin. My e12 already had the plastic version, and the 'start' function didn't work. What looks like happened is the original broke, P...
by Lock
Fri Feb 07, 2020 12:33 pm
Forum: Tech Forum
Topic: Glovebox Power Solution
Replies: 2
Views: 259

Re: Glovebox Power Solution

This is a really great solution Eric, thanks for sharing! I notice small USB cigarette lighter chargers don't play nice with the standard lighter socket because it's deep, you need bigger ones that then interfere with the shifter, so this is a great solution. Also if you have a cell phone holder lik...
by Lock
Fri Feb 07, 2020 2:51 am
Forum: Tech Forum
Topic: Red Line in gearbox and differential?
Replies: 5
Views: 328

Re: Red Line in gearbox and differential?

I've always used Redline MTL in my gearboxes when it's appropriate. One additive that has always worked for worn syncros in my gearboxes is "Nulon smooth shift". I buy it in batches. I've put Redline MTL in and seen how the shifts go. If they're still a little crunchy, add a tube of that. The worst ...
by Lock
Fri Feb 07, 2020 2:13 am
Forum: Tech Forum
Topic: 1981 bmw e12
Replies: 9
Views: 462

Re: 1981 bmw e12

Sounds like it's running on the cold start injector, that's spraying when cranking and giving it a bit of fuel. I'd unplug that for troubleshooting. If it doesn't fire at all, maybe it's fuel. Have you confirmed it' sparking on all leads when you crank? I also like to jumper on a 12v LED onto inject...
by Lock
Wed Jan 22, 2020 3:48 pm
Forum: Tech Forum
Topic: Has anyone ever installed a cruise control mod? If so, what model?
Replies: 7
Views: 499

Re: Has anyone ever installed a cruise control mod? If so, what model?

Lock, This "kit" requires the magnetic VSS speed pulse sensor - so I'm presuming that it ignores existing speedo hardware entirely. I'll need to research where Rostra says the speed sensor is best placed. ....Also, if I went to a pick and pull for a cruise control....I'd probably end up buying the ...
by Lock
Wed Jan 22, 2020 12:51 pm
Forum: Tech Forum
Topic: Has anyone ever installed a cruise control mod? If so, what model?
Replies: 7
Views: 499

Re: Has anyone ever installed a cruise control mod? If so, what model?

I think back in the day BMW dealers fitted aftermarket Escort units to late e12 528is :?: Why not raid the factory cruise from the e28 :?: 8) For me, I had an e34 parts car for a while, so plenty of time to pull parts. And the cruise control was modular, not integrated into the ECU, so it was easy ...
by Lock
Wed Jan 22, 2020 12:37 pm
Forum: Tech Forum
Topic: Proper coolant (or newer types that protect iron blocks)???
Replies: 9
Views: 580

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

I was researching the abbreviations and found this useful coolant color chart, to tell what you already have

https://www.valvoline.com/our-products/ ... ne-coolant
by Lock
Fri Jan 10, 2020 3:02 pm
Forum: Tech Forum
Topic: 77 530i motor into a 77 730i ?
Replies: 4
Views: 445

Re: 77 530i motor into a 77 730i ?

No problems, in that case it would be a minor downgrade, 3.3 to 3.0 liter. As I understand the connecting rods are the same length in M30 motors, it's the wrist pin location in the pistons which is moved for the different stroke, but I could be wrong. In case you were thinking of swapping the cranks...
by Lock
Thu Jan 09, 2020 8:00 pm
Forum: Tech Forum
Topic: 1976 BMW 530i "Eleanor" rebuild project
Replies: 56
Views: 2609

Re: 1976 BMW 530i "Eleanor" rebuild project

Hi Mike, great posts and pictures, thank you for sharing. It's great to see this teardown in detail and I know it takes a while to make each post. I wanted to ask about your removal of the crankshaft bolt, according to spec on the M30 motors it's supposed to be torqued to 302 ft lbs. I'm wondering h...
by Lock
Thu Jan 09, 2020 7:38 pm
Forum: Tech Forum
Topic: 77 530i motor into a 77 730i ?
Replies: 4
Views: 445

Re: 77 530i motor into a 77 730i ?

From what I've read, they are an identical motor and transmission and all the parts including the ECU are the same. There might be small differences but not enough to matter, the 7-series is just a slightly bigger, slightly improved e12 5 series. I don't know of the 730i being sold in the US, only t...