DIY: In depth M52/S52 OBD2 swap

[328ijunkie]

Look just do not fuck with those, they are TTY, and precisely angle torqued.

Put rags in the block, and just bend the bracket back and forth, it will snap clean and not affect the cap bolts or make a mess of shavings.

Done it this way 5 times and counting.

lol. ^This works and is what plenty of people do it. Im OCD as hell though and i remove the bracket and replace the 2 main cap bolts. Gives me the chance to look at that main bearing anyway 8-)

[choleaoum]

Just took out a S52 wiring harness, you know on the E36, there are 3 plugs where the fuse box on the driverside inside the engine bay? Do I need all 3 of those plugs? Or I just need that ONE larger plug (i believe the x20) because I was not able to seperate it yet without removing the whole entire engine.

[328ijunkie]

Depends on how you do the wiring but there are wires you need in all of them.

[choleaoum]

Depends on how you do the wiring but there are wires you need in all of them.

In all 3 of those connectors really?

[328ijunkie]

you dont need all the wires obviously but yes.

[choleaoum]

Can someone elaborate a bit more about the coolant temp sensor? The s52 is 4 prong and the new one is 2 prong. What am I suppose to do?

[328ijunkie]

You have 2 or 3 ports in the head? If only 2:

http://www.markertmotorworks.com/MMWProducts.html

[choleaoum]

What about it? I asked what do I do in regards to wiring.

[328ijunkie]

Need to wire the cluster part of the OBD2 wiring to the E30 cluster sensor.

[choleaoum]

So I'm suppose to chop the coolant sensor harness from the odb2 e36 harness? And pin it to fit the e30 plug? Which wired are they?

[choleaoum]

Also for the wind tray bracket thing, can't I just unscrew it from the crank?

[Mr.SWISS]

Also for the wind tray bracket thing, can't I just unscrew it from the crank?

If you want to replace the bolts and torque them down again. They are stretch type or TTY and are one time use bolts. If you want to not deal with that you can bend it back and forth and it snaps clean off no metal shavings from grinding it off and no rod knock from reusing TTY bolts.

[choleaoum]

Yeah thank god I didn't do it, cus all I had around were small metal pliers. That thing was a pain to break lol. Now I'm just stuck regarding the cooling sensor and oil temp sensor.

On the AGK diagram it says

http://www.akgmotorsport.com/e30convpins.html

19 Oil temp X6031 pin 10
20 Coolant temp 11

I'm not sure how to approach it. Am I suppose to remove the original sensor and put in the old E30 one after I die it? Then how would I plug it up? Cut the E36 harness and splice the brown/purple wire into that 1 pin?

Almost done, and as for the brake booster, am I shifting it torwards the driverside half an inch? Or down half an inch?

[choleaoum]

Really? No one can answer the coolant temp question

[craiggroves91]

Yeah thank god I didn't do it, cus all I had around were small metal pliers. That thing was a pain to break lol. Now I'm just stuck regarding the cooling sensor and oil temp sensor.

On the AGK diagram it says

http://www.akgmotorsport.com/e30convpins.html

19 Oil temp X6031 pin 10
20 Coolant temp 11

I'm not sure how to approach it. Am I suppose to remove the original sensor and put in the old E30 one after I die it? Then how would I plug it up? Cut the E36 harness and splice the brown/purple wire into that 1 pin?

Almost done, and as for the brake booster, am I shifting it torwards the driverside half an inch? Or down half an inch?

Brake booster is shifter towards the driverside, not down.

Can't help you with wiring