Beisan Systems - Procedures - M62TU 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 just to right of 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

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 AUC (smell) sensor from fan shroud left bottom just below expansion tank.
Push AUC to left and lift up on AUC left side to remove left mount.
Push AUC to right and lift up on AUC right side to remove right mount.
Allow AUC to hang form its electrical cable.

If present, remove coolant level sensor electrical connector at bottom of coolant expansion tank.
Press in tab at connector bottom and pull off connector.

Remove retaining plastic clip at expansion tank bleed screw. Press in at both side tabs and lift up (2 flatheads).
Note: Unscrew/re-screw expansion tank cap as needed to remove clip.

Remove expansion tank bleed screw (Philips).
Dislodge expansion tank top from fan shroud.
Reinstall expansion tank bleed screw (Philips).

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

Lift fan shroud up and to rear.
Unscrew overflow hose clamp at radiator right top (Philips).
Pry hose off radiator overflow neck (flathead).
Remove hose clamp from hose to keep from losing.
Note: If overflow hose clamp original (crimp type), pry open clamp to remove (small flathead) and replaced with adjustable hose clamp.

Pull expansion tank overflow hose out of fan shroud.
Pull up expansion tank and lay to side. Maintain overflow hose high to keep coolant from leaking.

Pull fan shroud up and out of engine compartment.
Maneuver shroud as needed to bypass radiator lower hose.

Lower expansion tank and lay expansion tank lower hose on AC compressor pulley.
Maintain expansion tank overflow hose high to prevent loss of coolant.

Fan & shroud installation

Shroud installation

Insert fan shroud into engine compartment position.
Pull up expansion tank and lay to side.
Maneuver shroud as needed to bypass radiator lower hose.
Align shroud by pulling up, forward, and dropping into position.

Install radiator overflow hose.
Lift fan shroud up and to rear.
Insert expansion tank overflow hose into shroud access slot and install expansion tank onto radiator. Lay overflow hose on top of radiator.
Insert overflow hose clamp onto overflow hose with clamp bolt head at bottom and facing forward (picture). Mount overflow hose onto radiator overflow neck. Position hose clamp onto radiator overflow neck and tighten clamp (Philips). Note: Position clamp bolt at bottom of radiator neck to allow for proper fan shroud fitment.

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 car frame.

Remove expansion tank bleed screw (Philips).
Insert expansion tank top into fan shroud.
Reinstall expansion tank bleed screw (Philips).

Install expansion tank retaining plastic clip at expansion tank bleed screw. Push down clip until it snaps into place.
Unscrew/re-screw expansion tank cap as needed to facilitate access.

If present, install coolant level sensor electrical cable connector at bottom of expansion tank.
Press in connector until it snaps in place.

Install AUC (smell) sensor onto fan shroud just below expansion tank.
Insert AUC into bracket right side.
Push AUC to left and insert AUC left side into bracket.

Note: AUC electrical cable connector was not previously removed.

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.

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.