M30 firewall modification pics
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Denny
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1990 BMW red 325IC M30B35 all stock Girlfriends ride
1991 BMW black 318IC (M62b44 Megasquirt 2 ver 3.57)
Blogs:
http://bmw325e30.blogspot.com/ (restoration)
http://bmw325e30turbo.blogspot.com (Twincharge M20)
http://bmw325e30m62b44.blogspot.ca/ -
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here's mine.
89 vert.
peeled off the rubberized sound deadening material and went at it with a 8lbs sledge and ball peen hammer.
I plan on recovering it with a thin film of somesort or simply re-shooting it with paint before I put the engine back in permanently.

Originally posted by flyboyxi have watched my dog lick himself off a few timesComment
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Originally posted by flyboyxi have watched my dog lick himself off a few timesComment
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1974.5 Jensen Healey : 2003 330i/5Comment
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I didn't need to modify the driver's side firewall at all but pushed in the passenger side a lot both behind the head and below it as well to create plenty of clearance for long tube headers. I used Otis B35 mounts in the furthest back of the two mounting holes. I ended up removing the insulation from the cowl cover and I covered the modified firewall area with stick on shiny aluminum faced heat shield that is thinner than the factory sound deadening. I have a good amount of clearance with this setup but I'm not running A/C or a turbo.Never argue with stupid people, they will drag you down to their level and beat you with experience. -Mark TwainComment
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Running e30.de mounts in P3, I only needed the most minor of mods with the B35. The engine dropped in with just the bulkhead insulation removed, and then I gave it a small hit near the starter where it barely touched. Then I pushed the bulkhead back with a bar about 3mm for clearance at the back of the head.
I an running the Getrag 240 box though, which might make a difference for gearbox clearance - the 240 is tiny.
If you happen to bash the firewall on a RHD car just remember that there's a long brake linkage to think about back there too!Comment
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1974.5 Jensen Healey : 2003 330i/5Comment
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I don't have any pictures, but I didn't have to massage mine more than about 3/4" or so with the Good & Tight mounts.
I do, been running it since day 1. Works perfect.
There is plenty of room if you're in "position 3" or whatever it's called. Basically if you have to massage your firewall in order to get the engine sat far enough back to match up with your mounts, then you'll have enough room for the AC compressor. Leave the compressor, lines, condenser, dryer, etc all hooked up when you remove the old engine. Just unbolt the compressor and tie it out of the way. When you install the m30, you'll have to modify the compressor bracket a bit but otherwise the compressor will bolt right up to your new engine.
Last edited by CorvallisBMW; 01-06-2015, 08:33 AM.Comment
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