How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Jerry Your Own Question
Jerry, Master Mechanic
Category: Car
Satisfied Customers: 17220
Experience:  ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager
Type Your Car Question Here...
Jerry is online now
A new question is answered every 9 seconds

1997 s320: the allen bolt on the clutch..threads..reverse

Resolved Question:

to remove the allen bolt on the center of a 1997 s320 fan clutch are the threads reverse or standard?
Submitted: 8 years ago.
Category: Car
Expert:  Jerry replied 8 years ago.

Hello and welcome to Just, Super mechanic here. About your vehicle.


You will want to turn it to the left to take it out. Here are the steps.


NOTE: Numbers in parentheses ( ) indicate a component or tool in the associated illustration.


  1. Remove fan shroud.





  1. Fit on wrench (7) 120 58914 07 00, or equivalent, at bolt of viscous fan clutch.
  2. Fit on torque wrench (8) 001 589 72 21 00, or equivalent, with head in wrench (7) removed.
  3. Fit on counter-holder (1) 120 589 02 01 00, or equivalent.
  4. Slacken bolt (4) of viscous fan clutch (3).
  5. Turn wrench (7) with handle (a).
  6. Unscrew bolt (4).
  7. Remove viscous fan clutch (3) together with fan (2) and bolt (4).
  8. Unbolt viscous fan clutch (3) and fan (2).
  9. Reverse procedure to install, noting the following:
    • As a result of cast rib, fan (2) can only be installed on one side.
    • Tighten the fan to viscous fan clutch bolts to 10 Nm .
    • Tighten the viscous fan clutch bolt (4) to bearing body to 45 Nm



Jerry and 9 other Car Specialists are ready to help you