Beisan Systems - Procedures - S62 Fan Procedure

M62TU Fan & Shroud Procedure

The following information is provided for reference purposes only and should be used at your own risk
In no event shall Beisan Systems, LLC or its members be liable for incidental, consequential, or special loss or damages of any kind however caused.

Fan & shroud removal

Fan removal

Remove fan, belt static friction method.
Remove fan / fan clutch from water pump shaft.
Place open wrench on fan clutch nut (32mm combo wrench). Place wrench forward on nut to avoid hitting radiator upper hose. Strongly strike wrench side at top with heavy hammer to break nut seize (sledge hammer); left hand thread.
Note: Nut is left hand thread, thus unscrew by hitting wrench top from left to right (car front orientation). Serpentine belt static friction on water pump pulley facilitates large enough opposing force to break nut seize. It is important to use a heavy hammer to produce a high instantaneous jerk. Several attempts will be needed before nut seize breaks. Rotate open wrench to reposition for better access.

If belt static friction method is not successful, attempt pulley holding tool method.

Remove fan, pulley holding tool method.
Remove fan / fan clutch from water pump shaft.
Position water pump pulley for holding tool access. Water pump pulley has 4 evenly spaced mounting bolts. Position one of the bolts at top center (picture) (32mm combo wrench).
Install water pump pulley holding tool onto pulley bolts. Position holding tool at right, and place tool indent curve against fan clutch nut bottom. Mount tool end hole onto pulley bottom left bolt, and tool second hole onto pulley right bolt. Reposition fan clutch nut as needed for better holding tool access (32mm combo wrench) (picture).
Place open wrench on fan clutch nut (32mm combo wrench). Counter hold holding tool and break clutch nut seize (32mm combo wrench); left hand thread.
Note: Nut is left hand thread, thus unscrew by turning wrench from left to right (car front orientation).

If fun clutch nut seize difficult to break, apply lubricant to nut/shaft contact surfaces (spray lubricant).

Once nut seize is broken, remove tools and spin fan blades to unscrew nut; left hand thread.
When nut is close to shaft end, turn fan slowly while continuously holding fan blades. This will keep fan from falling and damaging radiator fins when fully disconnected.

Pull up on fan / fan clutch and remove from engine bay.

Shroud removal

Loosen hose clamps at expansion tank overflow hoses (6mm socket 1/4" / 1/4" ratchet & extension).

Pull off overflow hoses from expansion tank and remove hose clamps from hoses.

Remove rivet at each side of expansion tank. Pry out rivet center pin (tack lifter), then fully pry out rivet from base (tack lifter).

Lift up on expansion tank to dismount from fan shroud and place to rear of shroud.

Remove rivet at each top corner of fan shroud. Pry out rivet center pin (tack lifter), then fully pry out rivet from base (tack lifter).

Remove rubber seal between fan shroud top and car frame (hand).
Note seal orientation for reinstallation.

Pull fan shroud up and out from radiator.
Lift up and place expansion tank to rear.
Maneuver shroud as needed to bypass radiator lower hose.

Remove AUC (smell) sensor electrical connector at bottom of fan shroud.
Press in connector side clips and pull off connector.
Remove fan shroud.

Press down and lodge expansion tank under air conditioning hose (picture).
Note: Be careful to not damage radiator fins.

Fan & shroud installation

Shroud installation

Lift up expansion tank and place to rear.

Position fan shroud at top of radiator.
Install AUC (smell) sensor electrical cable connector at bottom of fan shroud.
Press in connector until connector clips snap into place.

Insert fan shroud into engine compartment position.
Maneuver shroud as needed to bypass radiator lower hose.
Insert overflow hoses through shroud.

Lift fan shroud up, pull forward, and drop down to mount into side and lower radiator frame slots.
Note: Fan shroud should insert fully and align with radiator frame.

Install rivet at each top corner of fan shroud. Pry rivet center pin out, fully insert rivet base into shroud, then press in rivet center pin.

Install rubber seal between fan shroud top and car frame.

Install expansion tank at mount position on fan shroud.

Install rivet at each side of expansion tank. Pry rivet center pin out, fully insert rivet base into expansion tank and shroud, then press in rivet center pin.

Install coolant overflow hoses on expansion tank.
Place hose clamps on hoses with tightening bolt at front and facing up (picture).
Press hoses onto expansion tank hose pipes.
Place hose clamps in mounting position and tighten hose clamps (6mm socket 1/4" / 1/4" ratchet & extension).

Fan installation

Mount fan/clutch onto water pump shaft.
Insert fan/clutch into engine compartment at water pump.
Lift fan and mate (hang) fan clutch nut onto water pump shaft. Rotate fan to find best nut thread to shaft thread mate. At optimal fit, fan will hang on shaft without threading (picture).
With fan hanging independently on shaft, slowly turn fan blades to thread nut onto shaft; left hand thread. Fully thread nut onto shaft.

Place open wrench on fan clutch nut (32mm combo wrench) and lightly hit wrench top with heavy hammer, one time; left hand thread (sledge hammer).
Note: Serpentine belt static friction on water pump pulley facilitates large enough opposing force to tighten clutch nut. Fan opposing spin also tightens fan clutch nut.