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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 01-20-2011, 04:00 PM   #1
Michael Mendoza
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Cylinder heads for the 318i e46 m42

Is it possible to change a single overhead to a double overhead cylinder head?
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Old 01-20-2011, 04:07 PM   #2
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going offthe title I'm a little confused. BMW stopped using the m42 in e36s and besides those engines were DOHC
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Old 01-20-2011, 04:07 PM   #3
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Old 01-20-2011, 04:31 PM   #4
Michael Mendoza
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Sorry it's the m43tu
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Old 01-20-2011, 04:45 PM   #5
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Quote:
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going offthe title I'm a little confused. BMW stopped using the m42 in e36s and besides those engines were DOHC
Only in the US. In the rest of the world, BMW put the lame M43 in the e46 when the older M42 and M44 that came in the E30 and E36 were way better. It got phased out halfway through the E46's life with the N42.

My guess is that the head would go on since the M40, M42, M43, and M44 all shared a pretty similar block, but nothing else would probably fit up without modifications.
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Old 01-20-2011, 05:05 PM   #6
Michael Mendoza
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That's right and the cylinder head I got is the one with VANOS system.
Thank you for the answers guys
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Old 01-20-2011, 05:07 PM   #7
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Originally Posted by mkodama View Post
Only in the US. In the rest of the world, BMW put the lame M43 in the e46 when the older M42 and M44 that came in the E30 and E36 were way better. It got phased out halfway through the E46's life with the N42.

My guess is that the head would go on since the M40, M42, M43, and M44 all shared a pretty similar block, but nothing else would probably fit up without modifications.
Right. So the m43 was really a SOHC? Lol why the he'll would the down grade it
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Old 01-20-2011, 05:45 PM   #8
Michael Mendoza
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I got a spare cylinder head it's for a m44 that's why I'm asking if I could change my m43 head to a m44 head.
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Old 01-20-2011, 06:55 PM   #9
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it won't fit. The M44 couldn't pass emission demands anymore and got phased out by time the E46 came. They fitted the M43TUB19 in it. You can get up to 165 bhp with the M43TU B19 with some tuning effort. Or turbo, which gets you up to 180 Bhp (Noelle Motorrs) or even 355 bhp with GT-power.
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Old 01-20-2011, 08:05 PM   #10
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The last of the e46 didn't pass emission test the 2004 model?
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Old 01-21-2011, 11:43 AM   #11
Michael Mendoza
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I might just put an M3 front cut. It goes better more power with turbo.
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