This is a cross-post from Bimmerforums at the suggestion of some of the guys there:
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This thread will cover the complete dissection of 1 1995 M3 donor car, and the transplantation of all its tasty bits (engine, brakes, wheels, security system and anything else I can scrounge) into my 1995 318ti Club Sport.
Step 1: Strip down the M3,
bolt by bolt. Sell every possible, unneeded part from the M3 to bankroll suspension upgrades and swap costs. (All the interior is spoken for already, as is the hood and front splitter. Wheels, engine, brakes and swap parts reserved for my ti, otherwise, PM with requests)
Step 2: Clean, seal up, and prep motor with all new gaskets, oil pan baffle, welded oil pump nut, valve spring retainers, and any other upgrades that should be done with the engine out.
Step 3: Swap engine, tranny, cluster, security systems, lock cylinders (damn EWS), brakes, and anything else useful into the ti.
Step 4: Swap in aftermarket suspension with new suspension bushings all around.
The donor: Complete and drivable 95 M3. Buckled roof, bent frame, no hope for the car as it sits. Besides, I want all the good bits!
The recipient: Original 1995 Club Sport, dyno'd at 86 RWHP. Eagerly awaiting the heart from the M division that bore her.
STEP 1 - Day 1: Interior Dissection
Of course, all the big parts are easy...
Step 1: Day 2/3 Digging into the wiring I found this little gem. Unfortunately this means I have to swap lock cylinders all around. [Update: Apparently not. More details to follow in the thread] Early <96 models didn't have it, but apparently my 95 was late enough in the cycle to have one included.
All in all though, it's coming along pretty well. There's plenty left to do, but it will get there. I'm being really careful to label everything that I disconnect. Not only will I have to put it together again, but I'll have to figure out what to splice where into the ti.