1995 M3 S50 engine main bearing torque spec?

Question

Bought the Bently manual and there is NO bottom end data at all! What a rip off. Anyone know the correct torque for main bearing caps and rod bearing caps??

I have gotten a load of junk at Bimmerforum- so beware I actually have built many engines. Just never a BMW before.

Answer 1

this is straight from bmw.

Tightening specifications for main bearing:

1. Tighten all screws on main bearing cover with jointing torque. 20 nm

2. Unfasten screws on main bearing cover 6.

3. Strike back and front of crankshaft with plastic hammer to centre thrust bearing (do not damage crankshaft).

4. Tighten screws of main bearing cover 6 with jointing torque.

5. Tighten all screws of main bearing cover with special tool 11 2 110 or special tool 00 9 120 with torsion angle. 50 degrees the special tool is a angle gauge.

after jointing torque. then turn all screws 50 degrees.



Tightening torque,

S50 US M10 Replace, wash and oil screws

Jointing torque 20 Nm

torque angle 50 degrees

Answer 2

1995 M3 Specs

Answer 3

All I can suggest you is to get BMW TIS CD.



I couldn't find anything about main bearing caps.

What I found is Main bearing screws :

for S50 US Jointing torque : 20 Nm

Torque angle : 50deg.



Connecting rod bolts for S50/S62 thread M10x1,25

Application torque 5Nm

Jointing torque 20Nm

Torque angle 65deg.



Not giving you junks, just trying to help.

Answer 4

Hmmmmm, something you DON'T know!!!! Wow, definitely worth a laugh to me. I asked a question a while back and you gave a really smart-butt reply which wasn't helpful at all.



Karma, tsk tsk tsk. But unlike you, I really hope you find the answer to your problem and wish I could be of help. Sorry that I can't be. I did just type in a google search, here's the link:



http://www.conceptcarz.com/vehicle/z10495/BMW_320i/default.aspx



or:



http://forums.bimmerforums.com/forum/showthread.php?p=10419530



http://bmwnut.blogspot.com/2006/02/brief-history-of-bmw-m3.html



May not be anything related to what you need, but my heart was in the right place. And by the way, I aced my class with a 4.0.



Takes two points for an answer and walks away singing......."What the world needs now is love sweet love........"

Answer 5

you should go 75-80-then 85, but I have also torqued them on 90 it will not hurt a bit .,,,,,,,,,,

Answer 6

If you cannot find it Bentley E36 manual, your best bet is get it from the machine shop.