So serpentine belt breaks, replaced, breaks again. Replaced the tension pulley thinking that could be the problem. The belt STILL slides to the side and breaks. Any insight would be greatly appreciated. I have looked up a diagram for the correct belt positioning as well.
Whichever pulley it is sliding off of is not straight. check the alignment of ALL the pulleys and make sure there is no play in them. They should all be solid with no wobble. My guess would be a bearing is bad allowing play in the pulley which lets the belt "walk" to the edge.
SOURCE: Serpentine belt in a 1995 Mercury sable
I have the same car and last night my belt slipped off. The top small pulley backed it's self out. The problem is in most cars the pulleys are reverse threaded so this wont happen, in ours not so much. The pully spins loose with the turn of the belt so it has to be tightened way down. IT's a pain. Here is a diagram I found and You need a 15mm wrench, which doesn't just come in most sets. Good Luck
The book says "Using a 15 mm socket or wrench on bolt attaching drive belt tensioner pulley, rotate drive belt tensioner clockwise. Make sure spring keeper engages into slot." I would put a socket on the 15 mm pulley bolt and a long handle for leverage. Thats one tight spring.
SOURCE: Mercury Topaz serpentine belt diagram
I have a 93 topaz, the diagram label is under
the hood itself.
SOURCE: i need to change the serpentine belt for a 1993
I have 2 of the v-6 diagrams. the first is the 3.0 the second is the 3.8 but not SHO
SOURCE: engine diagram for 2001 mercury cougar
4 cyl or v 6?
2.5L V-6 with air conditioning built 01/99 onwards
Rotate the drive belt tensioner clockwise and remove the drive belt
To install:
Accessory serpentine belt routing-Ford 4.6L, 5.4L, and 6.8L engines with A/C
Accessory serpentine belt routing-Ford 4.6L, 5.4L, and 6.8L engines without A/C
Please let me know if it's diesel because the routing is different.
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