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Old 05-23-2004, 02:29 AM   #1
Hohner
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Confused to which engine I have.

I've got a '91 318i, the sticker on the inside of the door says 318iS ... do I have the m40 or m42? I'm really confused on this one.
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Old 05-23-2004, 03:27 AM   #2
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if your car is a 2 door it is a 318is
if it's a 4 door it is a 318i
so if it's the the 318i you have a M40
but if it's the 318is you have a M42
i'm pretty sure i'm right.......any other opinions?
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Old 05-23-2004, 04:03 AM   #3
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Sounds right to me.
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Old 05-23-2004, 04:22 AM   #4
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You have the m42. I have a 91 318i 4-door and its has an m42 in it. check these links, they show what engine codes for whatever year you need to look at.

e30 greakdown

e30 models
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Old 05-23-2004, 05:41 AM   #5
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Looking at the statistics site in an earlier reply, it says I have a 318iS engine in my 4 door 318i labeled car. I've got DOHC, my owners manual says i've got 135 horses. So, that means i've got an M42, correct? I KNOW i've got DOHC in my car... And, the M42 goes into the 318is, correct? I'm still confused.
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Old 05-23-2004, 06:14 AM   #6
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Old 05-23-2004, 09:34 AM   #7
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Yes, should be M42
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Old 05-23-2004, 04:27 PM   #8
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So, is that a screw up? Did they put a 318iS engine in a 4 door? Or is that normal?
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Old 05-23-2004, 09:36 PM   #9
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I think that engine went in all 91 318/318is cars. BMW didn't just screw up and put the wrong engine in there.
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Old 05-24-2004, 12:46 AM   #10
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Damn, if they did screw up ... that'd be cool. Haha.
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Old 05-24-2004, 04:34 PM   #11
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You have an M42. I dont believe M40 motors made it to the U.S. There is no difference in engines between the modles (the M20 found in a 325iS is the same as a 325i and the M42 found in a 318iS is the same as a 318i). And the 318i I am reffering to is the later modle plastic bumpered 4-door not the M10 powered 318.

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