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  #16  
Old 05-24-2014, 06:01 PM
Graplr's Avatar
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Join Date: Apr 2007
Location: Huntington Beach, CA
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Quote:
Originally Posted by kenstfelix View Post
When I got the car the servo was leaking, so I immediately bypassed it, by just connecting the hoses on either side of the servo. I added a valve to the hose on the right side. It definitely did something because I do get cool air now and it was always hot before. Still hasn't been hot enough outside to tell if the compressor is working.

Where do I look to see if the clutch is engaging? I've looked at the compressor but didn't know what to look for.

On my old 300d the servo was hooked up and not leaking, but the air was always incredibly hot.
Be careful... I think you may have put the ball valve in so that you stop the coolant flow? I can't tell from your picture but is the coolant returning in another place? I teed my two hoses together so that when the ball valve is closed the coolant can still flow.

On the front of the compressor, when the A/C is NOT turned on the "front middle plate" also known as the clutch will not spin. When the A/C is ON the clutch will spin with the pulley. There is an electromagnetic charge which attracts the metal plate on the clutch to the pulley and thus engages the pump of the compressor. So if your A/C is working the clutch will be spinning. That is what you look for.
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1979 300TD
1982 300TD
2000 E320 4Matic Wagon
1998 E430
1984 300SD
1980 300SD
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