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M51 conversion - engine mounts
Posted: Mon Jun 24, 2013 6:09 pm
by Irish_chris
Anybody know what engine mounts I would need to use to drop an m51 into my 318 e21?
Thanks
Re: M51 conversion - engine mounts
Posted: Mon Jun 24, 2013 6:27 pm
by nas80
Ok depends on if you got the 6cyl front subframe. I take it your getting rid of the standard brake system?
Re: M51 conversion - engine mounts
Posted: Mon Jun 24, 2013 6:42 pm
by Irish_chris
nas80 wrote:Ok depends on if you got the 6cyl front subframe. I take it your getting rid of the standard brake system?
Standard 4cyl subframe
Yes brakes are being gutted because of clearance issues among other reasons
Re: M51 conversion - engine mounts
Posted: Mon Jun 24, 2013 8:28 pm
by nas80
No one i know has done this swap. Post a pic of your lower half engine block. Also what box u running. Your more than likely going to end up with custom mounts mate. Its a lot easier eith a 6cyl subframe
Re: M51 conversion - engine mounts
Posted: Mon Jun 24, 2013 8:39 pm
by Irish_chris
I seem to be the first which has its ups and downs
I have a 4 speed 323 box to use for now
What are my options with a 6 cyl subframe?
For the e30 it requires e36 arms and e28 m5 rubber mounts I was hoping it would be the same
Ill get a pic when I have the front off the donor car
Re: M51 conversion - engine mounts
Posted: Mon Jun 24, 2013 9:32 pm
by nas80
If u are using an m20 box then you need to twist the linkage mate.
You are running a 4cyl subframe then your going to have to have a think. Because on an e30 thats a different subframe. You could prolly do it the e30 method if you had 6cyl.
Have u got a welder?
Re: M51 conversion - engine mounts
Posted: Mon Jun 24, 2013 9:39 pm
by Irish_chris
The gear linkage?
Yea I've a welder here.
Does anything else need changed to fit the 6 cyl subframe? Looks like I need another parts list haha
Re: M51 conversion - engine mounts
Posted: Mon Jun 24, 2013 10:15 pm
by nas80
You just need a 6cyl all your 4cyl stuff bolts to it.
If you use an m20 box it doesnt sit correct angle with the e36 mounts so you have to bend the gear linkage 10 degrees or so
Re: M51 conversion - engine mounts
Posted: Mon Jun 24, 2013 10:22 pm
by Irish_chris
nas80 wrote:You just need a 6cyl all your 4cyl stuff bolts to it.
If you use an m20 box it doesnt sit correct angle with the e36 mounts so you have to bend the gear linkage 10 degrees or so
cheers was more worried about struts as my struts are custom as i had airbags fitted
will test fit the e36/e28 setup and maybe few others and if not ill push for the 6 cyl subframe
am i right in saying i will need an m20 clutch/flywheel?
cheers for the help im too far in now to not do it, ive an e34 525tds and e36 325tds bought and all so this needs done
Re: M51 conversion - engine mounts
Posted: Mon Jun 24, 2013 11:11 pm
by nas80
yeah you might get away with using hockey pucks custom rubber off something else and or cutting the raised side m10 mount off and welding a plate there to make it like the m20 mount 6 cyl frame? either that or just make a mount its not too bad a job to do really.