Question about 1999 Mercury Sable
To replace the timing cover on the 3rd Generation is an a time consuming job, but can be done home with the proper tools. First thing to do is unhook the battery. Once that is done you can now begin.
Started with trying to drop the Y-pipe, it wasn't happening in my case and for other this will more then likely be the case. The flange stud on the rear were so rusted, there was no nut or threads.
For more info please go to: http://www.taurusclub.com/forum/82-maintenance-repair/170789-timing-cover-removal-instructions-3rd-generation.html This could give you an entire idea of the huge job that need to be done i think is better to have a specialist working on it
I hope it helps
Posted on Apr 06, 2015
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Posted on Jan 02, 2017
You don't mention replacing any tensioner bearing which if worn could be causing the belt to drift.
I would probably remove any covers and physically watch the belt to try to determine which of the surfaces on which the belt runs is at fault. I think the belt is probably not that cheap so I hope you cure this soon.
Posted on Mar 28, 2009
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Fig. Fig. 3: Releasing the timing belt tensioner using a special tool
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If this is a single overhead cam, possibly A15SMS (engine type):
If you have everything stripped down and can see the crank shaft gear, you will notice an arrow stamped into one of the gear teeth.
this arrow must point towards the bottom, you will notice a mark (notch) cut into the housing, line the arrow on the gear with this notch.
remove the four 10mm bolts that secure the top cover of the timing belt, gently open the cover (not removing it) to see the Cam Gear. You will not be able to remove the cover because of the design.
The Cam Gear should have a line stamped into one of its teeth, this should be pointing up and towards the top. On the inner cover you will notice a notch in the casing, line both up together if it is not already.
You can check the following if unsure:
Remove # 1 spark plug (nearest the Cam Belt) and place a long screwdriver in the hole carefully to feel the piston is at the top, #2 and 3 will be down and the last one #4 at the distributor end will also be up.
Remove the rocker cover and you should see the Cam loabes on #1 piston free, (no pressure on the cam shaft) meaning the valves are closed.
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