1990 Mercury Grand Marquis Q&A
1990 Mercury Grand Marquis Question: drive belt tensioner
All the engine accessories (power steering pump, alternator, air conditioning compressor ect are all driven off one fan belt that takes many turns and twists around each component and around idlers and tensioners. Check the fan belt for cracks or contamination. The belts don't stretch most likely the tensioner cannot adequately tension the belt. - patrick mannion
My 1991 grand Mercury Marqis has been making a squeeling sound for quite awhile now and it has begun to get louder under the hood of the vehicle.It sounds like to me it is comming form the belts an...