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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 08-14-2004, 03:06 PM   #1 (permalink)
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ok, if im going to bore a 2.5l engine to 2.8l can i use oem pistons, etc. from a 328? if so where is the best place to get them for a good price?
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Old 08-14-2004, 03:07 PM   #2 (permalink)
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also, if someone could give a detailed list of the parts needed to replace, or a site where i can find that that would be great.
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Old 08-14-2004, 09:18 PM   #3 (permalink)
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I've not heard of a 2.8l conversion, but I have heard of a 2.7l that uses a 2.7l crank and the normal pistons. It would probably have to be a custom job, but it might be possible to use the 3.8l crank and pistons and find out the bore diameters.

I assume you're attempting to build one of these? The engine is based on the m50 so it is possible.
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Old 08-15-2004, 03:18 AM   #4 (permalink)
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so if i bore it to 2.7l i can use factory pistons, etc. but need a new crankshaft. anything else? Any other ideas or diameters that people know have happened or have info on.

i have a 93 325is btw, thought it might help for you to knwo.
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Old 08-15-2004, 08:36 AM   #5 (permalink)
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u do relize that the 328 i had a 2.5 liter in it
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Old 08-15-2004, 11:16 AM   #6 (permalink)
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I'm pretty sure the 328 had a 2.8L in it... you can see a huge jump of torque over the 325's torque... they had to do this because of the OBDII so that the car's performance would suck...
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Old 08-15-2004, 01:26 PM   #7 (permalink)
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i think your right i am mistakin the 323 my bad
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Old 08-15-2004, 02:03 PM   #8 (permalink)
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i heard u can bored it 2.9l. not sure if thats true. but worth a try
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