Why did my serpentine belt come off after I put it on? managed to get the serpentine belt on my 92 grand marquis but later when I went to leave I discovered the belt had come off. Do I need to tighten something?

The trick is to wrap the belt around all the grooved pulleys first and leave the smooth idler pulleys for last. Then the belt can just slip on the smooth pulley

what's the problem? you need a 1/2" ratchet to push the tensioner and the belt will relax, then it's easy to replace

• Here is your diagram

• If you have any comments please feel free to leave them here.
• Hope this helps and thank you for using FixYa.

Regards, Tony

Move the Grand Marquis's serpentine belt tensioner off the serpentine belt with the serpentine belt tool. Pull the belt of the remaining pulleys by hand. Take the belt out of the engine well. Wrap the new belt around the bottom portion of the crankshaft pulley. Follow the belt routing diagram to route the belt over each remaining pulley until only the tensioner remains. Move the Grand Marquis's serpentine belt tensioner aside once more and slip the belt onto the tensioner pulley.Hold the belt in place with one hand while you move the tensioner slowly back into position with the other. Here you can fine the quality AC parts http://www.1airconditioning.com/ac_compresor.htm

First, keep a copy of this diagram as you will need it when you go back to putting it on…



Here’s a link to a “how to” video that will walk you through removal and replacement of your serpentine belt.

If it IS a serpentine belt, the tensioner should be fairly tightly spring loaded (if it is still in good condition), so if the belt is not getting tight, (and the tensioner is in good condition), you must be misrouting the belt. There is only ONE WAY the belt can be properly installed.

A serpentine belt has a spring loaded belt tensioner-no adjustment.
Each v-belt has its own separate belt tensioner which must be mechanically adjusted for tightness.

Is there still a sticker on your hood or by the fan shroud showing the proper belt routing for reference?

Hope this helps.

From the Dayco web site:

here you go