Engine swap - Jetronic to Motronic

[matt320]

Hi guys

I left the sunny shores of England for Australia last year and took my E30 320i with me. To get it road legal here I have to have various jobs done, one of which is fitting a catalytic converter and associated sensors. My car is Jetronic and I have been told this system can't run a cat.I have been able to source a 2.0 Litre Motronic engine from a 89 320i that has done only 47,000 miles, the wiring loom and ECU, as well as a spiggot bearing.. The donor car was in a bingle and is being repaired and converted to a spare race shell.

Will this be a straight take my engine out and pop the new engine with loom and ECU in?
The donor car is an auto and mine is a manual, will I need anything other than the spiggot?

and finally, does anyone have any advice for doing this?

Thanks in advance for any help, i would really appreciate it.

Matt

[Chaos]

edited - please ignore

[matt320]

The motronic will support the cat, that is what I have to change to. Tha car currently runs the earlier jetronic.

Matt

[matt320]

Can anybody offer any suggestions as to how straight forward this swap should be?

Thanks

Matt

[MONSPORT42]

If you're dropping in a Motronic engine in it will already have the extra sensors that this system needs so should be a straight swap as long as you connect up the wiring and ECU properly. As far as the auto/manual swap goes, the auto engine won't have a flywheel so you'll need one of those. It would be a great time to lighten lighten it/machine off some bulk which will make it more eager to rev too - not too much tho'!

[matt320]

Thanks for that. Does anybody know if I can just use the flywheel from the existing set up or is there a difference between the older and newer flywheels?

Cheers

Matt

[MONSPORT42]

Don't think there's any difference as long as it's from the same engine type.