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How To

How to Change the Timing Belt on a Mazda 323

Member
By SweetSandie
User-Submitted Article
(5 Ratings)

How to change a timing belt on a Mazda 323.

Difficulty: Moderately Challenging
Instructions

Things You'll Need:

  • New Timing Belt
  • New Tensioner
  • Mechanic socket and wrench set
  • Rags
  • Extra pair of hands
  1. Step 1

    First off when changing a timing belt on any vehicle, you would mark the timing pulleys with white out so they are easy to line up. These marks must be placed on the pulley wheel and on the manifold. That way you will have a set guild to put them back in place.

  2. Step 2

    Next you want to loosen up the tensioner enough so that the belt is loose and will slide off. Note the position of the timing marks and then gently slide the belt off without causing the pulleys to move.

  3. Step 3

    Most tensioners I have seen have to be replaced with the belt off so
    now you should replace the tensioner. Adjust the new tensioner so
    that it is not in the way when you put the new belt on.

  4. Step 4

    Now slide the new belt on without moving the pulley. This should be as easy as the old one coming off but sometimes it is not.
    You can use your finger to trial tension the belt and see if the white marks line up. The new belt may be a little tighter than the old so you may end up moving one of the pulleys a little to get the new belt on. It is a good idea to have an extra pair of hands available in case there is difficulty in putting the belt back on. First drape the belt across the top right pulley, have it catch the bottom pulley. Next have your extra hands hold the belt and pulley in place as you pull and slide the belt over the remaining pulley. This will help ensure that slippage does not occur and keeps those marks lined up.

  5. Step 5

    Finally, you crank down the tensioner and the marks should line up again. As you know the car will not start if the timing is not right, thus the importance that those marks line up!

Tips & Warnings
  • I want to add a statement here, I changed the timing belt on my Mazda Mx3 and it took many tries to get all three pulley marks to stay lined up. Being my first timing belt change out, I did not realize that the bottom pulley must be lined up as well as the top two! I did not mark the pulleys either. Therefore, I had to use the very tiny arrows on the pulleys to line them back up. So take heed to those marks!
  • This task may require a large amount of arm and hand strength in order to put the belt back on.
  • Knuckle banging is possible.
  • You will get greasy.
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