11 51 000 Removing and installing/replacing coolant pump (N55)
Only perform this work after engine has cooled down.
Mixture ratio, water: coolant = 1: 1
Protect plug connections against coolant and contamination.
Recycling:
Catch and dispose of drained coolant in a suitable container.
Observe country-specific waste disposal regulations.
Installation note:
- All screws, nuts, bolts and hose clamps removed during the repair must be replaced.
- Retaining elements on chassis and suspension and steering parts must be replaced.
Necessary preliminary tasks:
- Follow diagnosis instruction.
- Drain COOLANT .
- Remove ENGINE SPLASH GUARD .
- Remove FAN COWL .
- Release STEERING BOX (do not remove).
Disconnect plug connection (1).
Release coolant hose (2).
Installation note:
Note installation hose clamps.
Tightening torque 11 53 9AZ .
Release coolant hose (1).
Installation note:
Note installation hose clamps.
Tightening torque 11 53 5AZ .
Follow assembly instructions:
Installation note:
Hose clamps (1) must be installed in the center of the marked area (see Fig 3).
Release screws (1).
Tightening torque 11 51 2AZ .
Installation note:
Replace aluminum screws.
Unclip cable (1) from bracket.
Release screw (2).
Tightening torque 11 51 2AZ .
Installation note:
If the electric coolant pump is reused, it must be rotated one turn due to the breakaway torque at the impeller.
Assemble engine.
Bleeding instructions See 17 00 039 VENTING AND FILLING COOLING SYSTEM WITH VACUUM FILLING UNIT or 17 00 039 BLEED COOLING SYSTEM AND CHECK FOR WATERTIGHTNESS (N52T, N53, N55) must be observed without fail.