M30 swap

[1987E30project]

M30 wiring questions

i used an 88 325i harness.

i have an early style oil level sender for the m30 that should work for you.

i'll take pics for you of how i did my wiring.

Thanks. I figured out the oil switch connector and also realized the oil level connector in my e30 harness is a round connector sort of similar to the oxygen sensor. So I think I need to cut that connector and wire in a square one like the one from the M30

How did you wire the alternator? Did you use the M30 harness? The one that bolts to the engine or the E30 harness?

Do you know what this single wire with a connector hooks up to?

[bataangpinoy]

i used an 88 325i harness.

i have an early style oil level sender for the m30 that should work for you.

i'll take pics for you of how i did my wiring.

[1987E30project]

what year e30 did the harness come from?

From an 87 is convertible

[bataangpinoy]

what year e30 did the harness come from?

[1987E30project]

Any suggestions? Ideas?

[1987E30project]

Wiring questions E30 harness

I am using the E30 harness and I have a few questions.

Is there a way to find which of the 3 prong connectors go where. There are four of those connectors.

Did you cut the e30 oil level connector and splice in the M30 connector. From the C101 I was able to find oil level static and oil level dynamic.
The single wire with a connector at the end is for the coolant level sender in the coolant tank? If so what did you do? The sender has two prongs.

[1987E30project]

did the block touch the firewall where the trans mounts on it? mine touches on the pass/ and drivers side.

Yeah it touches on the passenger side right below the brake line.

[zaust]

My lower radiator hose was too short so here's what I did. I used two M30 lower radiator hoses, a 38 mm OD fitting purchased from Pegasus Racing, and two clamps. I tried it with one hose cutting it in half with the fitting in the middle and it was still too short. So installed the first half, then the fitting, took some measurements with the second hose, a cut and finally got it right.
[ATTACH]32615[/ATTACH]
[ATTACH]32616[/ATTACH]
[ATTACH]32617[/ATTACH]

Why did you not just use a e28 m30 rad hose ??? It fit's perfect. You now have another join and possible weak point the water system.

[bataangpinoy]

did the block touch the firewall where the trans mounts on it? mine touches on the pass/ and drivers side.

[CorvallisBMW]

^that looks great. I had the same problem with my lower rad hose but my solution isn't nearly as elegant.

[1987E30project]

M30 swap lower radiator hose too short?

My lower radiator hose was too short so here's what I did. I used two M30 lower radiator hoses, a 38 mm OD fitting purchased from Pegasus Racing, and two clamps. I tried it with one hose cutting it in half with the fitting in the middle and it was still too short. So installed the first half, then the fitting, took some measurements with the second hose, a cut and finally got it right.

[1987E30project]

updates please.

can you take pics of how close the pan sits to the subframe?

Here's a picture. Not the best but hopefully it gives you an idea. There is a gap about 1/2"-3/4".

[1987E30project]

updates please.

can you take pics of how close the pan sits to the subframe?

I'll post some pictures tomorrow. I'm trying to fit the wiring harness in the engine bay.

[bataangpinoy]

updates please.

can you take pics of how close the pan sits to the subframe?

[sacse30]

Jean, it seems like i've been asking you questions and reading your comments for a year and I still haven't gotten my car running. This whole project waiting stuff is very challenging to patience. Now when freinds ask how the project is coming I just respond with "I never know". Although, I've made more progress in the past month than I've made through the whole process. Getting all these parts together has proven to be a major challenge!