Find the drivebelts, then remove them. Remove the right front wheel and inner fender liner. Remove the idler pulley and bracket assembley, remove the water pump too, once you do that you should see the cover to the timing belt. But then you need to remove a few more things before you can get to the timing belt, but you need to get a manaul for your car and then it will explain as to how to do this.Most parts store sells a repair manual for your car and they are around $20.00. As each engine size is different. But this answer will give you an idea...
The 1994 Mercury Topaz has a chain and not a belt.
Your 1991 Mercury Topaz 2.3 liter has a timing CHAIN
The timing belt is inside the timing cover.
The 2.3 liter 4 cylinder and the 3.0 liter V6 have a timing CHAIN
On a 1993 Mercury Topaz : Both the 2.3 litre four cylinder engine and the 3.0 litre V6 engine use a timing CHAIN
the pump is timing belt driven and is located under the timing belt cover recommend replacing the timing belt at the same time.
on the front of the motor, it will have the sepentine belt around it I am working on my wifes' 1996 mercury mystique and the alternator is located behind the timing belt. If you are standing directly in front of your vehicle the timing belt is located to the left side of the motor and the alternator is located directly behind the timing belt.
It is under the timing cover, driven by the timing belt.
when the belt has no slack in it
when should i change the timing belt on a mercury villager
Timing BELT
Is it safe to drive my 2000 Mercury Mystique with a bad timing belt?