DIY: In depth M52/S52 OBD2 swap

[Mr.SWISS]

How did you wire up the brown top e30 coolant temp sensor? My understanding (and I could be wrong) is that the OBD2 harnesses use one temp sensor that has both readings for the cluster and DME, hence the 4 wires going to the OBD2 temp sensor. Did you splice off one of those wires to the e30 brown top sensor?

If you search, you will find the answer in one of my wiring threads. IIRC it was a black w/ yellow stripe but it was a while ago.

[craiggroves91]

How did you wire up the brown top e30 coolant temp sensor? My understanding (and I could be wrong) is that the OBD2 harnesses use one temp sensor that has both readings for the cluster and DME, hence the 4 wires going to the OBD2 temp sensor. Did you splice off one of those wires to the e30 brown top sensor?

You'll have to have a wiring guy answer that. I sent my harness in to have it modified.

[Boise]

How did you wire up the brown top e30 coolant temp sensor? My understanding (and I could be wrong) is that the OBD2 harnesses use one temp sensor that has both readings for the cluster and DME, hence the 4 wires going to the OBD2 temp sensor. Did you splice off one of those wires to the e30 brown top sensor?

[mtlbloodshot]

Did it have the one with the angled top on it? That's the setup I really wanted to go with but the ix booster does fine I have no complaints.

I would like to know your feedback on it when you get going.

Yah thats one that comes stock on the Audi MC. I will let you know my feedback when everything is done. Here's a pic I found

[Mr.SWISS]

Did it have the one with the angled top on it? That's the setup I really wanted to go with but the ix booster does fine I have no complaints.

I would like to know your feedback on it when you get going.

[mtlbloodshot]

Is that the A4 1.8T booster? I was going to go this route as well since you can use the res it includes instead of a remote res but the seller couldn't find the booster after I won the auction someone scrapped it!!

So I used a e32 dual chamber and MC.

It is from a Audi A4 (b5). I was worried that the res was going to touch the TPS so I got a much smaller res ( in diameter ) but slightly taller.

[Mr.SWISS]

I found out that this worked awhile ago and since I have contacts in VW/AUDI, I got this brake booster and MC for dirt cheap. It bolts right up to the firewall. 2 bolts instead of 4 in a cross pattern. It holds perfectly.

All that needs to be done is cut the AUDI brake booster push rod and rethread the E30 clevis. Here how it looks. This is my bay.

Is that the A4 1.8T booster? I was going to go this route as well since you can use the res it includes instead of a remote res but the seller couldn't find the booster after I won the auction someone scrapped it!!

So I used a e32 dual chamber and MC.

[craiggroves91]

Great write up.

Thanks :)

[Link]

Great write up.

[craiggroves91]

I found out that this worked awhile ago and since I have contacts in VW/AUDI, I got this brake booster and MC for dirt cheap. It bolts right up to the firewall. 2 bolts instead of 4 in a cross pattern. It holds perfectly.

All that needs to be done is cut the AUDI brake booster push rod and rethread the E30 clevis. Here how it looks. This is my bay.

Curious as to how the pedal will feel

[FredK]

Looks great mtl. Is that a 25mm MC?

[mtlbloodshot]

I found out that this worked awhile ago and since I have contacts in VW/AUDI, I got this brake booster and MC for dirt cheap. It bolts right up to the firewall. 2 bolts instead of 4 in a cross pattern. It holds perfectly.

All that needs to be done is cut the AUDI brake booster push rod and rethread the E30 clevis. Here how it looks. This is my bay.

[craiggroves91]

Nice thread! I see you're in the SF bay too....are going to get t BAR'ed?

It's not BAR'able at the moment

I want to hear your completed exhaust soon, I want to go the same route

There are videos on my build thread.
It sounds awesome! Better in person than the vids

[ZekeTheSneak]

I want to hear your completed exhaust soon, I want to go the same route

[e30serg]

Nice thread! I see you're in the SF bay too....are going to get t BAR'ed?