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Old 09-27-2018, 03:08 AM   #1
tougebmw318ti
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Post proof read please? M52-M44 OBD2 - OBD2

my chassis is a 97 318ti and ill be doing an OBD2 - OBD2. So far i have compiled this

Main bits:
1x m52 engine
1x custom intake
1x custom exhaust

Eletrical:
1x donor instrument clustor
1x donor ECU
1x donor EWS box
1x m52 coolant temp. sensor
1x m52 ignition coil box thing
1x donor car main engine wiring loom

(if anyone knows how to get J!Ms swap manual, let me know)

Driveshaft/running gear
(ill be using my 318ti transmisson and driveshaft. later ill swap in an E30 LSD)
1x m52 flywheel
1x new M52 clutch W/ other bits

Misc:
1x m52 fuel pump
1x m52 throttle cable
rad hoses and power steering hoses
2x m52 motor mounts
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Old 09-28-2018, 02:25 AM   #2
Projectvoltron
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I am currently going through this swap for the first time and I had a question on a few of those too.
I still don’t know about the throttle cable or what to do with the evap system. I have an entire donor car so that helps.

If you have a donor car I would relocate the battery as well due to the Secondary air pump stuff goes where the Ti battery is. Or you can delete the SAP. I did both options.

From what I understand is every e36 based vehicle has the same fuel pump including the m3 so I didn’t swap that.

One thing you might need to swap over is the fuel pressure regulator unit. The one on the m44 is on the fuel rail as to where on the m52 donor vehicle it’s underneath where the driver sits.
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Old 09-28-2018, 02:40 AM   #3
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Throttle cable is needed.

Like Voltron says, don't need fuel pump. I think on a 97 the fuel reg is by the fuel filter instead of rail, but a good point to check.

I'd consider a new larger radiator.

The rest seems right.
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Old 09-28-2018, 11:28 PM   #4
tougebmw318ti
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ive read from a few people on here that the m44 throttle cable is to short for the M52
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Old 09-28-2018, 11:33 PM   #5
tougebmw318ti
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also im a bit unsure about the evap system myself. but thankfully in my state, emissions is never checked.
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Old 09-28-2018, 11:36 PM   #6
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Quote:
Originally Posted by tougebmw318ti View Post
ive read from a few people on here that the m44 throttle cable is to short for the M52
Yes you'll need the 6cyl cable.
__________________
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Old 09-29-2018, 05:00 AM   #7
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Quote:
Originally Posted by tougebmw318ti View Post
also im a bit unsure about the evap system myself. but thankfully in my state, emissions is never checked.
I canít find any info on it. Iím just doing like the 323 system for evap stuff.

I donít have emissions stuff either. I just donít want check engine lights.
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Old 10-05-2018, 05:14 PM   #8
Motts
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Default swap findings

I'm also working on an M52 swap, though sometimes it seems more like researching & less doing.

As far I've found, if you delete the SAP, you're going to get CEL.
There's 2 solutions.
1. Flash DME to remove this requirement.
2. Get SAP emulator plug.
I'm planning DME flash, it's cheaper and I'm removing EWS also.

As far as moving the battery, my brother has an E36 coupe he races. He is moving the battery from the back and putting a smaller, lightweight battery in engine compartment. Should save 12-15 pounds of heavy gauge wire plus battery weight. Seems like a good solution for ti's too, less work than relocating and less weight.
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