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Answered 2011-09-12 21:04:36

the location of the belt tensioner is in a tight spot. anyone who has replaced one and has normal size hands knows what I'm talking about. I'll try and make you a step by step procedure below. For visual reference, please view my BIO to gain access to my Saturn help site. In the serpentine belt folder is a picture of the tensioner and the two bolts that hold it in place, so you get an idea of where they are in relation to the tensioner unit.

1. Raise and support the vehicle with Jack stands on both sides

2. Remove the front passanger side tire (19mm lug nuts)

3. In the wheel well, remove the splash shielding to gain access to the motor.

4. Place a decent size peice of wood on your jack, and slide it under the oil pan, raise the jack so it firmly presses on the oil pan.

5. Under the hood, remove the motor mount on the left side of the motor, the mount is held on by Three 15mm nuts with studs on the motor itself, and Two 15mm nuts holding the mount to the body. remove the mount completely.

6. slowly lower the jack supporting the engine until the engine sits all the way down.

7. from inside the wheel well, place a 14mm wrench on the belt tensioner pully bolt. swing the tensioner to remove tension on the belt, remove the belt from the tensioner or main crank pully.

8. You should have access to the lower bolt on the tensioner. the bolt is 10mm in head size. i recommend using a 1/4" ratchet. Remove the bolt.

9. raise the jack as far as you can, making sure the vehicle stays on the jackstands!!! this should allow you to reach down and beable to remove the top bolt on the tensioner. the motor will come up on an angle.

10. once the bolt is out, the tensioner should just fall out of the motor. reinstall the tensioner with the top bolt first, lower the engine, reinstall lower bolt, reinstall belt, reinstall the upper motor mount, and raise the engine to level out with the upper mount.

The job sounds complicated if you are not mechanically inclined, but its accually simple. you will not break anything by moving the motor. the job should take a average person about 30-45 minuites to complete.

ALTERNATIVE and BETTER WAY in my opinion: I just replaced the tensioner on my 98 Saturn SL; removing the motor mounts is completely unnecessary! This job is easy for anybody who can remove a tire. The key to this job is having a 10mm (six point) socket head (3/8 fitting) that fits a breaker bar (3/8 fitting) TO FIT BETWEEN the 10mm top bolt of the tensioner and the wheel well where the motor mount is connected.

A regular socket wrench will take up too much space, but a breaker bar will allow you to EASILY connect to the bolt. A breaker as long as a standard socket wrench shgould give you plenty of swing/arc to rotate the bolt. (btw...I have big hands and can palm a Basketball)

Follow steps 1 through three, then break the top bolt first. KEY to EASY REMOVAL: Once the bolt is loose, I switched to a mini socket (1/2" fitting) to rotate the bolt off. HOWEVER I made the mistake of rotating to far initially and the socket butted up against the wheel well, so I simply screwed the bolt in a bit, removed the socket, and rotated it off by fingers. Use a 10mm wrench if it isn't loose enough instead of a smaller socket. Again, the key to this job are the tools: basic ones. Forget about the motor mount removal.

Ignore the bolt on the pulley that connects the pulley to the tensioner. The bottom bolt is a cinch. I recommend the breaker. The tensioner falls right out.

Reverse the steps of course for replacement. You don't have to take the belt off when your tensioner fails - assuming the belt is OK.

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