Buy Now | Log In | ALLDATA Corporate Site | AutoZone.com
Back To Home Page
Log In To Your Subscription
Go To ALLDATA Back Home
Buy A Subscription! Back Home About ALLDATA Information View Sample Vehicles Read Testimonials View Factory Service Bulletins and Recall Titles Contact Us
Dowload Our Navigation Chart
February 2015: New vehicles added including 2014 GM.
• View New Vehicles
October 2014: Release of 2013 along with initial 2014 Vehicles
• View Vehicles
View All News and Updates:
• Go To News
Tech Tips
  Read All Tech Tips

ALLDATA Tech Articles Are Updated Weekly
• View All Tech Articles

  Dodge Durango: Brake Pulsation Problems In Paul's Durango
• Read Dodge Article
 
Fixing A Smelly Audi Audi Tech Tip: A4 begins to Smell caused by a Faulty Hose Composition
• Read Audi Article
Why Do You Need To Change Your Timing Belt? Why Replace Your Timing Belt
• Read Belt Article
Jim Grant Tech Tips Jim Grant Tech Tips
A collection of helpful articles based on reader submissions
Home >> Featured Tech Articles >> Go Back
   
  Jim Grant's Tech TipsJim Grant's Tech Tips
Below is a collection of Jim Grant's Tech Tips sorted by Vehicle Make. These Tech Tips were answers to questions submitted to Jim by ALLDATAdiy.com users over the course of many years.
If you have any questions, please feel free to email us.
 
 

Miscellaneous
Acura
Audi
Buick
Cadillac
Chevy
Chrysler

Dodge/Plymouth
Ford
GMC
Geo
Hyundai
Honda
Isuzu

Jeep
Lexus
Lincoln - Mercury
Mazda
Mercedes
Mitsubishi
Nissan
Oldsmobile
Pontiac
Saturn
Subaru
Toyota
Volkswagen
 
   
  Jim Grant's Tech Tips

'94 Mercedes C280, Clutch Fan Operation

Q: How can I verify if my newly installed viscous fan clutch in my ‘94 C280 Mercedes is operating OK? Would the clutch be engaged even at cold temperature at low RPM? When does it kick-in/kick-off? I just replaced my old one which was too noisy (always engaged) with a brand new one from the dealer. I don't see any change. Please explain as much as you can.

- David H.

A: Here’s the basic description and operation of the clutch fan for you Mercedes. Cut-in Temperature at a specified airflow temperature from the radiator acts on the bimetal of the viscous fan clutch. The hot air causes the bimetal to alter its shape and cause the cooling fan to lock in. The change in airflow is easily heard as it occurs. When operating correctly you will hear the fan change based on the airflow temperature over the radiator. There is an oddity on Mercedes’ clutch fan, which you may not know about. When you received the clutch fan, it should have been boxed in a special way. Why is that? The temperature controlled viscous fan clutch must be transported in the upright position. The viscous clutch may be placed down on its flange side for a short period for assembly purposes, but should never be placed with the front down! If this procedure is not followed, you could easily create new or recreate existing problems.

 
     
Have any Questions About ALLDATAdiy.com? Please Email Us
Buy Now | Log In | About | Sample Vehicles | Testimonials | Join Affiliate Program