Removing and Installing Coolant Pump
WM 195019 Removing and installing coolant pump
Preliminary work
Preliminary work
1. Drain cooling system.
Draining cooling system
2. Remove the radiator frame.
Radiator frame
Information
Component overview for coolant pump
Overview of coolant pump in engine
Component overview for coolant pump
1 - Coolant pump
2 - Seal for coolant pump (replace seal)
3 - 2 dowel sleeves (do not remove)
4 - 8 M6x25 fastening screws (tightening torque 10 Nm (7.5 ftlb.))
5 - Support for cable duct (fit with the two upper fastening screws)
Removing coolant pump
Removing coolant pump
1. Separate the electric connection from the throttle adjuster. To do this, press on the plug at the top and bottom and, at the same time, pull it off. Unclip the cable from the sheetmetal holder.
Electric connection on throttle adjuster
2. Remove the throttle adjuster.
Fastening screws on throttle adjuster
Information:
To ease removal, spray the pulley from the rear side with an anti-corrosion agent.
3. Unscrew the three fastening screws on the coolant pump pulley. Wrench size is T 40.
Fastening screws for coolant pump pulley
4. Remove the drive belt from the coolant pump pulley. Mark the direction of running of the drive belt with chalk.
Drive belt on coolant pump pulley
5. Use an open-ended wrench (a/f 30) to turn the belt tensioner clockwise and, at the same time, remove the drive belt from the tensioning roller. Relieve the belt tensioner carefully. Remove the drive belt from the coolant pump.
Belt tensioner
Notice:
Incorrect handling of pulley
Risk of damage to pulley
- The pulley is sensitive to impact. Do not prise off the pulley with a screwdriver.
- Do not re-use a damaged pulley.
6. Remove the 3 loosened fastening screws on the pulley and remove the pulley.
Fastening screws for pulley
7. Remove the eight fastening screws on the coolant pump and remove the pump. If the pump is stuck, loosen it by gently tapping with a plastic hammer.
Fastening screws for coolant pump
Loosening the coolant pump with a plastic hammer
Installing coolant pump
Installing coolant pump
Notice:
Incorrect handling of pulley
Risk of damage to pulley
- The pulley is sensitive to impact. Do not prise off the pulley with a screwdriver.
- Do not re-use a damaged pulley.
1. Clean sealing surfaces. Mount new sheetmetal seal on the coolant pump. Slide the new sheetmetal seal over the dowel pins.
New sheetmetal seal on the coolant pump
2. Tighten the eight fastening screws. - Tightening torque: 10 Nm (7.5 ftlb.) Mount the sheetmetal holder for the cable duct using the two upper fastening screws.
Mount the fastening screws for the coolant pump
3. Fit the pulley on the coolant pump. Screw in the three fastening screws by hand.
4. Mount drive belt -as shown below-. To do this, turn the belt tensioner clockwise and thread the drive belt around all the pulleys. Then carefully relieve the tensioning roller.
Installation sequence for drive belt
5. Check whether the drive belt is correctly installed.
6. Tighten the three fastening screws on the coolant pump pulley. - Tightening torque: 23 Nm (17 ftlb.)
Fastening screws for coolant pump pulley
7. Tighten the throttle adjuster with a new seal. - Tightening torque: 8 Nm (6 ftlb.)
Fastening screws on throttle adjuster
8. Connect the throttle adjuster. The connector must engage audibly. Clip the connecting cable into the sheetmetal holder.
Connecting cable to throttle adjuster
Subsequent work
Subsequent work
1. Install the radiator frame.
2. Fill and bleed the cooling system according to instructions.