R1100S tranny oil drain plug torque?

[JimMoore]

Folks,

My manual says the tranny oil drain plug torque is 55nm. That seems a little high. Can someone confirm that?

Thanks,

[Moybin]

Well, couldn't find the S, but the RT/RS value for both filler and drain plugs is 23NM.

[JimMoore]

Yep. That's why the 55 nm figure kinda surprised me.

[ckcarr]

BMW R1100S Torque SPECIFICATIONS

Oil-Head Specs – torque values, clearances, capacities, etc.
Here is a torque chart for BMW oil heads


BMW Boxer Data
R1100RT / R1100RS / R1100GS / R1100R / R850R
Unit or
Designation Data Spec.
Engine (incl. filter) 4 qt
Engine (w/out filter) 3.7 qt.
Gearbox fresh fill 1.1 qt.
change 0.85 qt.
Rear wheel drive
fresh fill 0.26 qt.
change 0.25 qt.
Valve clearance
measured cold, max. 35-deg C.
Intake 0.006 in.
Exhaust 0.012 in.
Spark plugs
Bosch FR5DTC
electrode gap 0.032 in.
limit of wear 0.04 in.
Engine Idle Speed 1000 +/- 150 rpm
CO value
without catalytic converter 1.5 +/- 0.5 Vol %
Cable adjustment - for increased cold starting speed
without cable junction < 0.04 in. play
with cable junction no backlash
Throttle (without cable junction)
gas cable (one piece) ca. 0.02 in. play
connecting cable no backlash
Throttle (with cable junction)
gas cable (one piece) ca. 0.02 in. play
junction cable no backlash
Clutch cable adjustment
at lever 0.28 in.
wire cable at handle bar lever 0.48 in.
BMW Boxer Data Metric
R1100RT / R1100RS / R1100GS / R1100R / R850R
Unit or
Designation Data Spec.
Engine (incl. filter) 3.75 liter
Engine (w/out filter) 3.5 liter
Gearbox fresh fill 1.0 liter
change 0.8 liter
Rear wheel drive (Differential)
fresh fill 0.25 liter
change 0.23 liter
Valve clearance
measured cold, max. 35-deg C.
Intake 0.15 mm
Exhaust 0.30 mm
Spark plugs
Bosch FR5DTC
electrode gap 0.8 mm
limit of wear 1.0 mm
Engine Idle Speed 1000 +/- 150 rpm
CO value
without catalytic converter 1.5 +/- 0.5 Vol %
Cable adjustment - for increased cold starting speed
without cable junction < 1 mm play
with cable junction no backlash
Throttle (without cable junction)
gas cable (one piece) ca. 0.5 mm play
connecting cable no backlash
Throttle (with cable junction)
gas cable (one piece) ca. 0.5 mm play
junction cable no backlash
Clutch cable adjustment
at lever 7.0 mm
wire cable at handle bar lever 12.0 mm

Tightening torques
These have been converted from Nm (Newton meters) to
the nearest 0.5 ft.lb. (foot pounds) by dividing Nm by 1.355.
Oil Filter 8 ft.lb
Engine oil drain plug 23.5 ft.lb.
Gearbox oil drain plug 17 ft.lb.
Rear wheel drive oil drain plug 17 ft.lb.
Locknut valve adjust 6 ft.lb.
Cylinder head cover 6 ft.lb.
Generator to bracket 14.5 ft.lb.
Tension multiple ribbed belt (Poly-V) 6 ft.lb.
Spark plugs 14.5 ft.lb.
Fuel tank to rear frame 16 ft.lb.
Fuel pump to tank 4.5 ft.lb.
Adjustable handle bars 14.5 ft.lb.
Quick release axle thread
(axial) 22 ft.lb.
Quick release axle clamp 16 ft.lb.
Brake caliper—front / rear 29.5 ft.lb.
Bearing bolt swingarm to gearbox/rear axle
(Locktite 2701) 110.5 ft.lb.
Idler bearing pinon on swinging arm on
gearbox/rear wheel drive
(Locktite 2701) 5 ft.lb.
Locknut (Locktite 2701) 77.5 ft.lb.
Rear wheel retaining studs 77.5 ft.lb.
Tube clips to air intake pipe 1.5 ft.lb.
Screw connect spring strut on control arm
(RS with side bearing) 31.5 ft.lb.
M 10 Screw 29.5 ft.lb.
Tighten cylinder head -- done only at 600 miles,
four nuts, do one nut at a time, loosen nut and
torque to 15 ft. lb., then turn nut an additional
180 degrees (called torsion angle)
Tightening torques
Metric
Oil filter 11 Nm
Engine oil drain plug 32 Nm
Gearbox oil drain plug 23 Nm
Rear wheel drive oil drain plug 23 Nm
Locknut valve adjust 8 Nm
Cylinder head cover 8 Nm
Generator to bracket 20 Nm
Tension multiple ripped belt
(Poly-V) 8 Nm
Spark plugs 20 Nm
Fuel tank to rear frame 22 Nm
Fuel pump to tank 6 Nm
Adjustable handle bars 20 Nm
Quick release axle thread
(axial) 30 Nm
Quick release axle clamp 22 Nm
Brake caliper -- front / rear 40 Nm
Bearing bolt swingarm to gearbox / rear axle
(Locktite 2701 clean thread 150 Nm
Idler bearing pinon on swinging arm on
gearbox/rear wheel drive
(Locktite 2701) 7 Nm
Locknut (Locktite 2701)
clean thread 105 Nm
Rear wheel retaining studs 105 Nm
Tube clips to air intake pipe 2 Nm
Screw connect spring strut on control arm
(RS with side bearing)
8.8 screw 43 Nm
M 10 Screw 40 Nm
Tighten cylinder head -- done only at 600 miles,
four nuts, do one nut at a time, loosen nut and
torque to 20 Nm., then turn nut an additional
180 degrees (called torsion angle)

Dali Meeow's additional data -- metric and English
Gap between lower rocker arm bearing carrier
and rocker arm
(manual pp.11.40) 0.05 - 0.40 mm
(Adjust to the minimum gap for
much quieter engine) .002 - .016 in.
Torque for T45 torx screws on the lower
rocker arm bearing carrier 18 Nm 13 ft.lb.

[JimMoore]

Thanks. I took a look at the tranny drain plug. It is completely different from the drain plug on the typical oilhead. Now I believe the 55nm figure, but I don't have a tool that can get to it.