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BMW E30 3 Series 1984-1991 (318i/s, 325/e/i/is/ix, M3, conv) M20 fuel rail removal


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Last Post: Apr 5, 2009 5:24 PM Last Post By: romeomike56
sierrarain

Posts: 2
Registered: 10/09/08
M20 fuel rail removal
Posted: Oct 9, 2008 6:07 PM
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Hi I am trying to remove the fuel rail on my E30 M20 motor. Dos aney one have a method in wich you remove the mounting bolts? boats am trying to replace my thermostat housinig.
FKH161

Posts: 7,594
Registered: 12/29/05
Re: M20 fuel rail removal
Posted: Oct 18, 2008 7:54 PM   in response to: sierrarain in response to: sierrarain
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Did you have to remove the intake manifold?
sierrarain

Posts: 2
Registered: 10/09/08
Re: M20 fuel rail removal
Posted: Oct 19, 2008 12:03 AM   in response to: FKH161 in response to: FKH161
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No, I figured it out after an hour of looking at it. First Remove the intake support bracket, then the injector harness must be un-clipped and removed before being able to access the for bolts that secure the fuel rail to the induction manifold. Remove the fuel rail clips, then the fuel rail can be removed.
FKH161

Posts: 7,594
Registered: 12/29/05
Re: M20 fuel rail removal
Posted: Oct 19, 2008 12:17 AM   in response to: sierrarain in response to: sierrarain
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I had to change the injectors on my 4 cyl M10 five years
ago... wasn't sure if the M20 was similar, sounds like it is.
romeomike56

Posts: 5
Registered: 03/03/09
Re: M20 fuel rail removal
Posted: Mar 3, 2009 7:42 PM   in response to: sierrarain in response to: sierrarain
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When you pulled the injector harness, what did you do to remove the boot/male connector from the driver side? I was able to figure out you unscrew the bottom half of the wiring connector below the boot, but a bit puzzled how you get the top half of the connector out of its hole in the metal frame.

Thanks in advance.
romeomike56

Posts: 5
Registered: 03/03/09
Re: M20 fuel rail removal -- solved
Posted: Apr 5, 2009 5:24 PM   in response to: romeomike56 in response to: romeomike56
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After further research, a 1.25 inch socket can be used to remove a plastic lock ring (part number 12 52 1 718 127) on the underside of the bracket, then the male connector can be lifted from the bracket's top side.

I suspect I would have made my job easier by removing the spark plugs, but eventually was able to remove the rail and change out the injector o-rings. Unfortunately, that wasn't enough to stop the rough idling until the intake manifold gaskets were replaced. It's idling smoothly now.

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