M62TU Fan & Shroud Procedure

The following information about the M62TU Fan & Shroud is provided for reference purposes only and should be used at your own risk
In no event shall Beisan Systems and LLC or its members be liable for incidental, consequential, or special loss or damages of any kind however caused.

Fan & shroud removal

Fan removal

Note: Nut is left hand thread, so unscrew by hitting wrench top from left to right (car front orientation).

Breaking Nut Seize Using Serpentine Belt Static Friction:
First, it’s important to recognize that the static friction generated by the serpentine belt on the water pump pulley plays a crucial role in creating a strong opposing force. This opposing force is essential for effectively breaking the nut seize, as it prevents the pulley from rotating while applying torque to the nut.

Next, to maximize the impact of this opposing force, use a heavy hammer to deliver a sharp, high-impact blow to the wrench. This sudden jerk helps overcome the resistance caused by the seized nut. Additionally, ensure that the wrench is positioned correctly to avoid damaging nearby components, such as the radiator hose or other delicate parts.

Finally, if the nut does not break free on the first attempt, reassess the setup to confirm that you have sufficient static friction and that you have properly aligned the wrench. Then, repeat the process with another firm strike, ensuring precision and control throughout.

By following these steps, you can safely and effectively break the nut seize without causing unintended damage to surrounding components.

Next, to achieve the best results, use a heavy hammer to deliver a sharp, high-impact jerk. This sudden application of force is necessary to overcome the resistance caused by the seized nut. Additionally, ensure that the hammer strike is precise and targeted to avoid damaging surrounding components or applying unnecessary strain.

Finally, if the nut does not immediately break free, reassess the setup to confirm proper alignment and static friction engagement before attempting another strike. Patience and precision are key to successfully completing this step.

Finally, ensure that the hammer strike is precise and forceful enough to avoid unnecessary strain or damage to surrounding components. Proper technique and timing are critical for success.

 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 Using Pulley Holding Tool Method:
First, prepare to remove the fan and fan clutch from the water pump shaft. Begin by positioning the water pump pulley to allow access for the holding tool. The water pump pulley has 4 evenly spaced mounting bolts . To optimize access, position one of the bolts just to the right of the top center, as shown in the picture. Use a 32mm combo wrench to adjust the pulley if necessary.

Next, install the water pump pulley holding tool onto the pulley bolts. Position the holding tool to the right and align its curved indent against the bottom of the fan clutch nut. Then, mount the tool’s end hole onto the bottom-left pulley bolt and its second hole onto the right-side pulley bolt. If needed, reposition the fan clutch nut slightly to improve access for the holding tool. Refer to the provided picture for proper alignment.

Once the holding tool is securely in place, place an open 32mm combo wrench on the fan clutch nut. Counter-hold the holding tool with one hand while using the wrench to break the clutch nut seize. Remember that the nut has a left-hand thread , meaning it loosens by turning counter-clockwise. Apply steady pressure to ensure the nut breaks free without damaging surrounding components.

Finally, once the nut is loosened, carefully remove the fan and fan clutch from the water pump shaft. Set the removed components aside in a safe location to avoid damage or contamination before proceeding to the next steps.

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:
First, locate the AUC (smell) sensor, which is positioned at the left bottom of the fan shroud , just below the expansion tank. This will help you identify the correct component to remove.

Next, begin by pushing the AUC slightly to the left . While doing so, gently lift up on the left side of the sensor to release it from its left mount. Once the left mount is free, reposition the AUC by pushing it to the right . Then, lift up on the right side to release it from the right mount.

After both mounts are disengaged, allow the AUC to hang freely from its electrical cable. Be sure to handle the cable carefully to avoid any strain or damage.

Finally, double-check that the AUC is securely suspended and out of the way before moving on to the next steps.

After both mounts are disengaged, allow the AUC to hang freely from its electrical cable. Be careful not to strain or damage the cable while handling the sensor.

Finally, ensure the AUC is safely suspended and out of the way before proceeding to the next steps.

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.

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