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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix. is the premier BMW Forum on the internet. Registered Users do not see the above ads.
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Old 06-05-2005, 11:05 PM   #1 (permalink)
Join Date: May 2005
Posts: 8
keepiteuro is an unknown quantity at this point
I just got a 85' 325i engine for my 85 318i how hard is the swap and what all do I need? trans rear end? wiring? is there a swap tech site out there im completly lost and blind....
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Old 06-06-2005, 01:46 AM   #2 (permalink)
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Join Date: Dec 2004
Posts: 299
offabroadway is an unknown quantity at this point
There are definitely sites, and DIYs out there for this kind of thing.

Basically, from the 325, you will need:
- Engine
- Wiriing harness
- Radiator
- Fuel pump(s)
- Motronic engine box
- Transmission
- Driveshaft
- Differential

Those are the absolute basics. If you want, you can swap the rear brakes onto your 318i, because they'll be discs and your originals are drums. Much better stopping power and resistance to fade. Of course, whichever car has the best interior, do as much swapping as possible. Drop in the OBC from the 325, they're a good tool, and a fun toy.

To finish off the project, I reccomend shaving your 318i badges, but not reinstalling the 325 ones. This will give your car a sharper rear look, and won't betray the car's original make, nor tip people off to the fact they're dealing with a six-cylinder. If you want to be punchy, a little stealth can't hurt.

I'm sure more people can give you more technical info. As always good luck, and keep us posted.
<img src='' border='0' alt='user posted image' />
Changed the car's name, now it's - Roxanne -1985 325e
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Old 06-07-2005, 08:29 PM   #3 (permalink)
Join Date: May 2005
Posts: 8
keepiteuro is an unknown quantity at this point
any do it your self websites? im running thin on info to even start this still trying to find a whole donor car and those are slim to none....
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