Venatus 2 Report post Posted April 26, 2008 Are there any differences between facelift and prefacelift m20b25 engines? Thanks Quote Share this post Link to post Share on other sites
JiB 0 Report post Posted April 26, 2008 Yes, Different crank-angle sensor placement. Have a search, I'm pretty sure it's been covered before. Quote Share this post Link to post Share on other sites
drifty325i 0 Report post Posted April 27, 2008 Early ones are higher compression as well=more power but can be more worn as they are older now Quote Share this post Link to post Share on other sites
Venatus 2 Report post Posted May 1, 2008 are the distributors in different places? ive seen photos of m20b25s and the distributor is in a different place to mine, mine is stuck on the end of the block right next to the fan... Quote Share this post Link to post Share on other sites
Brennan 0 Report post Posted May 1, 2008 exhaust ports are bigger on FL I think from what ive read Quote Share this post Link to post Share on other sites
_Alan_ 6 Report post Posted May 1, 2008 Correct me if I'm wrong.. but I'm pretty sure pre-facelifts use Jetronic fuel injection while facelifts use Motronic. Just a newer system I guess Alan Quote Share this post Link to post Share on other sites
Mike 1 Report post Posted May 1, 2008 Correct me if I'm wrong.. but I'm pretty sure pre-facelifts use Jetronic fuel injection while facelifts use Motronic. Just a newer system I guess Alan close, all 325i's use moronic. Other pre-fl cars used jetronic, then went to motronic for FL. Jetronic M20's have the dizzy on the side of the block, while Motronic 20's have it off the head. Quote Share this post Link to post Share on other sites
QuickSilver 0 Report post Posted May 3, 2008 close, all 325i's use moronic. Other pre-fl cars used jetronic, then went to motronic for FL. Jetronic M20's have the dizzy on the side of the block, while Motronic 20's have it off the head. yep, except PFL use 1.1 moronic and FL use 1.3 am I right? Quote Share this post Link to post Share on other sites
gmccormack 0 Report post Posted May 3, 2008 are the distributors in different places? ive seen photos of m20b25s and the distributor is in a different place to mine, mine is stuck on the end of the block right next to the fan...No, the distributors are always mounted directly on the end of the cam on M20B25s. If the distibutor is out the side it is not a M20B25. Quote Share this post Link to post Share on other sites
Mike 1 Report post Posted May 6, 2008 yep, except PFL use 1.1 moronic and FL use 1.3 am I right? yeah thats sounds right. Quote Share this post Link to post Share on other sites
