Worn motor mounts can cause the motor to rise during acceleration, causing a clunking noise and possibly damaging the AC hoses. Damage to the AC hoses can cause a loss refrigerant resulting in no cold air from the AC. The motor mount will need to be replaced prior to repairing the damaged hose or the problem will continue.Google+
Car Problem Reports
Mercury Sable Worn Motor Mounts Can Damage AC Hoses
Mercury Sable Problem
Average Mileage: 235,631 mi (162,000 mi - 309,262 mi)
Visitor, 1997 Mercury Sable, 309,262 mi
Car vibrates when driven until it reaches about 35-40mph .. Have list coolant slowly.. Believe backing out of my driveway I may have backed over the concrete curb. I believe from what I have read here it could be cracked or broken motor mounts.
Visitor, 1993 Mercury Sable, 162,000 mi
I have Worn Motor Mounts. Was told I need A/C compressor fixed. Not sure if the worn motor mount is the cause but it might be.