1990 - 24v swap

[moatilliatta]

Looking good! What part of Indiana are you in?


Cherry interior?


It looks like your previous photos went missing.

[AWDBOB]

A thing of beauty. Fantastic work, Mr. Matt!

[Elysian]

Beautiful.

[mjweimer]

EDIT Update: All 201 pictures are now linked back into each post properly.

Will continue to update the thread as time allows.

[mjweimer]

I dont see any pics!...

Sadly Flickr account issues broke all of the links. I could go through and add some of the pics back to my album library but I have so many pics it would take a long time to sort...it's kind of a bummer really.

[2mAn]

So good! Can’t wait for tandem burnouts.

also......
2mAn COTM cough cough

I dont see any pics!...

[AWDBOB]

So good! Can’t wait for tandem burnouts.

also......
2mAn COTM cough cough

[mjweimer]

This thread is long overdue for an update....much has been done over the past year and I have a ton of pictures to sort through. In the meantime, this is where we are today:



EDIT: pictures moved to post #144 so they fit into the timeline.



Still to do: address the oil leak at the temp sender in the filter housing, minor repair to the front floor pan and source an E36 m5x/s5x coupe/sedan AC bracket and compressor to get the AC hooked up (unfortunately, the Z3 parts interfere with the lower radiator hose).


I'll start sorting through the pictures. Cheers!

[mjweimer]

I don't think I've ever seen an M52/S52 without that recall performed.
Hopefully a new cam sensor fixes that issue. Mine had the typical wire rot under the connector boot and threw some vanos codes.

Agree that dbilas intake looks wicked.

This is my first M/S52 so I was not familiar with the recall, the part # supercession on RealOEM clued me in to the change. Cam sensor is on the way so I should be able to get some results this weekend.

The intake is a really nice option, the aluminum housing is a bit heavy but it allows for many mounting options.


MJ

[Northern]

I don't think I've ever seen an M52/S52 without that recall performed.
Hopefully a new cam sensor fixes that issue. Mine had the typical wire rot under the connector boot and threw some vanos codes.

Agree that dbilas intake looks wicked.

[mjweimer]

More driving has revealed some interesting issues. Check engine light illuminated after a long drive...INPA reveals crank position sensor fault....no biggie - that can be investigated.

Then it starts to get weird, the laptop was plugged in for a while with the key "on" as I was looking at the Z3 ETM to confirm some wiring...and randomly the fuel pump cycles. Maybe half a second...then stops. It repeats a couple of times randomly as I am double-checking some of the electrical connections under the intake but now I can hear the injectors clicking too - WTF?

Long story short, after quite a bit of troubleshooting I can get the problem to repeat by putting pressure on the outer casing of the CAM position sensor where the wire enters the plastic over-mold. Fuel pump cycles, injectors fire and apparently so do the coils when pressure is applied (it eventually lit off one cylinder). Clearly there is either a short or open in the wiring that makes the DME think the engine is turning over. This all makes sense since the engine will run off of the Cam sensor signal if it does not see a crank sensor signal and vice-versa - a limp mode.

More digging found an old post by Dave Markert (328ijunkie) where he explains this as a common failure that can eventually get bad enough to damage the DME's 5V signal generator circuitry. Hopefully that is not the case here....


I still need to check for signal voltage at the respective sensor plugs and DME pins to make sure there is nothing going on in the harness or with the DME itself.


Oh and FYI to all M52/S52 OBD2 folks - there was a recall in 1999 to replace the crank position sensor with the updated version as used on the E46, etc. It requires an adapter harness that grabs power from the injector rail (vanos solenoid) and sends +12V to the sensor rather than the original +5V. See service bulletin SIB 12 10 99. The ETM I have does not reflect this update.

first off, that Dbilias airbox is the business. very cool.

second, i love that you use OE fuel hose and hose clamps. a man after my own heart. seriously.

lovely work. glad to see you are able to go rip it around, and even better, that it fired up on the first try. that's always such a nice feeling. great job.

A

Appreciate the kind words, it has been a fun project. I have a few more ideas to make this build a little different than others.



MJ

[e30austin]

first off, that Dbilias airbox is the business. very cool.

second, i love that you use OE fuel hose and hose clamps. a man after my own heart. seriously.

lovely work. glad to see you are able to go rip it around, and even better, that it fired up on the first try. that's always such a nice feeling. great job.

A

[mjweimer]

Great work as always, glad you were able to get the AKG mounts sorted out,, some very good info for future swap guys cause the mounts always seem to do that.. Happened to me on both swaps like I was saying earlier and was very discouraging.. I'm also glad to hear AKG mentioned it's OK to slot the trans brace, because I had to as well. Looking back I should have given them a call as well..


Hope your enjoining the X3 booster? I recently "upgraded" the booster in the Mtech convertible to the X3 as well and love it.

Thanks! X3 booster/master is excellent. It gives a nice firm pedal with stock levels of vacuum assist. This is really a great option for a swap if you don't mind a little modification; easy to find, cheap and fits great.


Yeah, I'm trying to post stuff that will help others in the future or that is not clear in other threads....I have read and received a lot of good advise on this forum so hopefully can give back a little bit.


MJ

[KIRIEIW]

Great work as always, glad you were able to get the AKG mounts sorted out,, some very good info for future swap guys cause the mounts always seem to do that.. Happened to me on both swaps like I was saying earlier and was very discouraging.. I'm also glad to hear AKG mentioned it's OK to slot the trans brace, because I had to as well. Looking back I should have given them a call as well..


Hope your enjoining the X3 booster? I recently "upgraded" the booster in the Mtech convertible to the X3 as well and love it.

[mjweimer]

Minor update - have put several miles on the car but can't get too far away from the house on a straight exhaust with no lights and no plate. So far so good, the engine is a sweetheart and really wants to pull, suspension feels great but I need to spend some time dialing the toe and the feel of the X3 booster is just spot-on.

A couple of small punch list items = speedo/odo not working (probably the diff sender) and a bit of rev hang off idle (need to check my charcoal can/purge valve plumbing).

It's been a while since the last time I read your project topic. Very nice and careful work all along the line. Highly enjoyable read.

Thanks! Not quite as big a project as your car thanks to my lack of skills but it been a fun learning experience.



MJ