Date registered: Mar 2014
Vehicle: 2006 CLS55 AMG
Location: East Coast, USA
Mentioned: 0 Post(s)
Quoted: 15 Post(s)
Draining Radiator - Petcock problems
Hi -- I normally post over in the 219 forums.
I'm attempting to drain the radiator fluid from my 06 CLS55.
I found the petcock on the driver's side of the radiator, and with a little effort I "unlocked" it and it turned 1/4 turn then stops. No fluid comes out. I can relock it by return it to its original position, and unlock it again with no problem back to this 1/4 turn position.
I'm doing this all by hand. Here's the questions: I'm afraid that if I exert force on it with pliers I might break the valve. Is this normally easy to turn? Is there a trick to it?