View Full Version : How much heavier is an M52 motor than a M42?

12-11-2002, 05:40 AM
Trying to figure out how much car will squat after i swap the M42 for an M52?

12-12-2002, 12:13 PM
Hi.. the engine will weigh about 40kg more if you use the M52 with iron block...

Take a look at this link.. useful info. on weights etc...


12-13-2002, 01:59 AM
Thanks for the info! The link was cool too. Thanks!

E30 Stu
12-15-2002, 08:36 PM
I am calling total BS on that chart. They say that an M42 is 20kg HEAVIER than an M10?!

The M50 is about 60pounds heavier than an M42.

12-16-2002, 12:42 AM
So how much lower will my e-30 sit after the swap? 60 pounds heavier would be what? about 1 in. lower?

Dave 325i
12-16-2002, 03:25 AM
Why wouldn't the M42 be heavier? Or just not by 20kg?

E30 Stu
12-17-2002, 11:56 PM
Originally posted by Dave 325i
Why wouldn't the M42 be heavier? Or just not by 20kg?

M42's are 3" shorter than M10's, have lighter blocks, lighter heads, lighter everything.

With an extra 60 pounds, it might sit .2-.5" lower, definately not 1 full inch.

12-18-2002, 05:19 AM
That means with the 1.6 front drop of the Intrax springs, I will be at about a little over 2 inch drop after the M52 goes in. This should be alright on 17/7.5 with 225/45/17.