Firstfives.org

It looks a lot like mine:
http://bmwfans.info/parts/catalog/E12/Sedan/Europe/528-M30/LHD/M/1976/may/browse/brakes/expansion_tank-2/

Agreed, that is the one. Double 02 salvage is sending me a used one.

The car I am working on is a CA car and the combo relay and some emissions related valves ...

I bought a perfect used one from double 02 salvage. Try them.

Thanks Blaise, I will do just that.

After much surfing and looking at pictures, I've convinced myself that this car has the remote reservoir from the earlier 530/630. What BMW lists for the 633 seems to be what is shown in Eddie's ...

Ebay for used, or sometimes this or the Sixer boards have parts in classifieds.

Maybe rockauto.com, autopartswarehouse.com, ...

dealer if muny no concern.

Thanks T.Hanson, I so wish it were that easy. My usual parts sources had nothing for me.

The car I am working on is a 78 model 633 that was ...

I'm still working on the formerly dormant 633. The brake reservoir is plastic with 3 lines coming from it, two in the direction of the engine, and one to the rear. The one to the rear has been broken, glued, and broken again. The reservoir looks like this:

http://www.hermitagewood.com/forum/633 ...

In troubleshooting my auxiliary cooling fan, I found an online manual that said one of the two regular-sized relays between the fuse panel and the coolant tank was the extra fan relay. What is the other one?

Also, when I pulled both relays and examined them, they had different pin-outs. Pins 85 ...

Have you attempted to repair the old combo-relay? Been curious if anybody had luck with that repair, I haven't broken my old one open to try it yet.

In my old relay, the circuit that closes the relay when the AFM door is opened includes a resistor, and on mine that resistor appears to be bad ...

Okay, for the *next* person that has this same concern, the 13-pin combo relay '0 332 514 121' (0332514121) DOES WORK in place of the 12-pin combo relay '0 332 514 105' (0332514105).

It was necessary to remove from the relay plugs on the car, a plastic piece that blocked the location where the ...

The diodes keep the fuel pump from engaging the starter, so I understand why they are required, but the resistor seems unnecessary.

I found the (non-BMW) reference to Bosch combo relays in the link below. The author explains that the resistor I questioned is there to limit current flow through ...

From your issue, it almost sounds more like you might have a bad fuel pump that is just on it's last legs.

Thanks TSchultz, indeed I wish that was it. The start-but-not-run problem was the original problem my brother in law had with the car a year ago or more. The car has sat since then, and I ...

http://www.hermitagewood.com/greybimmer/633-medium.jpg

I'm new to this forum, but not to older BMWs. I'm helping out my brother-in-law with his 78 model 633. I have had a good bit of experience with the E28 based 6ers, but this is the first E12-based car I've had in my garage. As you might have ...