M30 5spd

[Jean]

So this must be it, the rectangular C101... it's modular so that's good . I'll just grab another from a parts car and see if I can make a m10 to m30 adapter instead of cutting the engine or chassis harness.

[euroshark]

I used those same wiring instructions. I think the only area he doesn't address quite right is the green wire on the C103 which feeds power to the ECU at a pin that I don't remember the number to... lol. Otherwise, very good instructions. You should be able to make an adapter pretty easily. Does your engine harness have the round plug? I made an adapter with an E30 plug and a rectangular plug from my 6 to keep everything looking neat. You can see the top of it here:

[Jean]

Thanks for the info! I haven't rec'd the b35 harness yet, I assume it will have a round connector on it...

Looking a the rectangular c101 (until 1985 models) it's a 19 pin connector with only the following pins being used.

1 d+ for alt charge indication
2 sta oil level static
4 FT coolant temp transmitter
6 15s power supply with ignition turn on - fuse protection
7 EP electric fuel pump
8 50 power while starting
10 15u Power supply with ignition turned on - wire w/o fuse protection
15 dyn Oil lever dynamic
16 Ol Oil Pressure
17 SI Service indicator reset

I haven't found or looked at the B35 end yet...

[Jean]

Good thread - http://www.mye28.com/viewtopic.php?t...=asc&&start=50

and - http://opel-scan.ru/files/DME_1.1_1.3.pdf

and - http://www.e21bmw.net/tech/motronic.php

[Jean]

Scored two main b35 radiator hoses today at $3 each.... still need to get the right radiator though.

List of items still left to get

radiator
water pump
t-stat
bottom radiator hose
short water pump/tstat hose
e34 overfill tank (i think that's the route I want to go with over m20 overfill tank)

clutch master cylinder
clutch slave cylinder
clutch kit

engine mounts
tranny mounts
sounds like i might have to shorten the linkage from reading the other e30 m30 swap thread...

[DLag]

glad to see a local do this swap. Maybe you can help me when I start mine.:D

[Jean]

Heh, once I get mine done sure! You got an engine/tranny already?

I just picked up an e32/e34 overfill coolant tank today. I would like to try and go this route instead of using m20 tank...

[E30SPDFRK]

I used a e32/4 overflow tank. I like how it looks but it does require a bit of modification to fit.

[Jean]

As in getting it to physically fit or coolant lines? I figured going with e32/34 tank would require least modifications to the coolant lines, but I don't have an engine in the bay yet.

What was your experience with it?

[E30SPDFRK]

For the coolant lines it is probably the best option. To make the tank itself fit though, I had to cut most of the little studs off the firewall, cut the lower support bracket off the tank itself and notch the support under the hood.

All in all it wasn't too much work, but its nothing like using an e30 one.

[Jean]

That doesn't sound too bad, my 84 chassis doesn't even have a place for stock e30 tank anyway :)

[Jean]

Alright here is the B35 end of the E34 535i harnes thanks to Bradley.

Left side of the table



But of course the rectangular C101 on the e28 is not the same as on the e30 ?!!



My C101 on the E30 that I have to work with:



and it's pin outs

[Jean]

Can someone with access to e28 c101 post a picture of it, I would like to confirm if it's the same or different from e30 c101 (rectangular type).

[Jean]

Alright, so the 5speed E34 m30 harness I had was missing a couple connectors. I was able to figure out what they were and going to solder/splice them in today/tomorrow. I had a spare half of the m30 harness that came with my engine and it had those connectors on it....

Now to figure out if the e28/e30 c101 plugs are the same or different?! ARGH

[Jean]

And they are not the same... e23 and e30 c101s are different from the e28 ones.