EDIRTY 1 Report post Posted August 9, 2007 (edited) hey, i'm trying to accurately identify my bmw engine. Originally my car was a 1985 323i, but the previous owner had to replace the engine and used an engine from a 325i. From what i can tell it is still running the jetronic ignition from the 2.3ltr, is this possible?? Obviously i cannot use the VIN on the car to determine engine specifics as that would relate to the original engine. What is the easiest way of identifying exactly what engine i have (year of production etc) other than the obvious M20B25 any help would be appreciated Edited August 9, 2007 by EDIRTY Quote Share this post Link to post Share on other sites
hotwire 352 Report post Posted August 9, 2007 hey, i'm trying to accurately identify my bmw engine. Originally my car was a 1985 323i, but the previous owner had to replace the engine and used an engine from a 325i. From what i can tell it is still running the jetronic ignition from the 2.3ltr, is this possible?? Obviously i cannot use the VIN on the car to determine engine specifics as that would relate to the original engine. What is the easiest way of identifying exactly what engine i have (year of production etc) other than the obvious M20B25 any help would be appreciated Yes it is possible to convert L jet to motronic & vice versa (have done myself) Engine ID - Look mid way down L/H side of block (under intake manifold) - has year of manufacture in casting. Look on L/H (I think from memory) side along bottom of block (just above sump) there is a flat section in the casting with engine details imprinted within. If not on left then obviously check right Quote Share this post Link to post Share on other sites
EDIRTY 1 Report post Posted August 9, 2007 Yes it is possible to convert L jet to motronic & vice versa (have done myself) Engine ID - Look mid way down L/H side of block (under intake manifold) - has year of manufacture in casting. Look on L/H (I think from memory) side along bottom of block (just above sump) there is a flat section in the casting with engine details imprinted within. If not on left then obviously check right thanks for that dude, i'll check it out today. how difficult will it be for me to convert form jetronic to motronic? i'm guessing its not as simple as replacing the ECU are there other parts i will need? Quote Share this post Link to post Share on other sites
Nobimmer 694 Report post Posted August 10, 2007 OG EDIRTY. SOrry bit off topic Quote Share this post Link to post Share on other sites
hotwire 352 Report post Posted August 10, 2007 thanks for that dude, i'll check it out today. how difficult will it be for me to convert form jetronic to motronic? i'm guessing its not as simple as replacing the ECU are there other parts i will need? No more involved than that, Motronic use different manifolds, (you can leave exhaust though) engine loom, need to remove distributor & fit oil pump drive/blanking plate (from motronic engine) in place of. Dismantle front of engine, swap cam gear, water pumps, fit motronic distributor drive assy/ crank pully/crank angle sensor/timing cover/ AFM. With engines out - a couple of hours work to change over Quote Share this post Link to post Share on other sites
