Data Sheets

This page contains data and specification on my 3.8L M5.  Most, if not all, engine specs and torques are the same for the 3.6L engine as well.  The parts are nearly all identical.  The bore is the same on both engines, the 3.8L has a longer stroke.   All torque values are in ft. lbs. which will have to be converted to Newton*meters.   To convert, multiply by 1.3556.  At the advice of Jime Rowe at Metric Mechanic, I don't do the angle turns, just work out converting to an actual torque.   I tested this theory on the main caps and a 53° turn which measured about 47 ft. lbs.

Engine BMW Spec Actual (ft. lbs.) Comment
Main bearing cap 15-18, + an additional 47-53 degree turn 45 Main caps only go on one way
Rod caps 15-18, + an additional 47-53 degree turn 45 Rods have matching numbers on the rod and cap.   The numbers are both on the passenger side.
Oil pump mounting bolts 15 -17 ft. lbs 16  
Oil pump drive gear 18 - 22 20  
Rear main seal housing M6 bolts  7-8

M8 bolts  12-15

 8

15

 Make sure the small bolts only get 8 ft. lbs.!  I broke one when I gave it the wrong one.  These M6 bolts cannot handle much beyond 10.
Cam chain cover M6 bolts  7-8

M8 bolts  12-15

 8

15

  
Oil pan 7-9 9 Alternating every other bolt to 6ft. lbs, then all to 9.  Double check.
Oil level sensor 7-8 8 Only goes on one way.
Motor mount to block bolts M8 bolts 14-16

M10 bolts 30

 16

30

 Drivers side motor mount has a bracket for the oil level sensor connector.  It goes on the lower right bolt.
Harmonic balancer main bolts 82-94 90 Better eat your Wheaties
Crank pully bolts 15-17 17  
Accessory bracket mounting bolts M8 bolts 14-16 16