The timing belt is not the most difficult item to replace on your vehicle, however if attention to detail is not followed, it can cause some of the most expensive damage. The Timing belt (T-belt) should be replaced every 70,000 miles or after 5 years of use. The five years of use is something I have made up because of the condition I have observed the belts in after 5 years. The 1993 850 has a 50K mile replacement interval, because the belt is not as wide as the 1994 and later belts. These procedures outlined below are for the 850, however the same procedures will work for the S/V/C 70 as well. These directions try to assume you have no knowledge of T-belt removal and replacement.

       Start by removing some of the plastic coverings. Remove the six 30mm torx screws holding the cover plate for the spark plugs. The fuel lines will remain in place, however remove the 25mm torx that holds a bracket in place, this will allow you to slightly move the fuel lines to get to the 10mm bolts holding the top of the T-belt cover. Lift the coolant bottle out of the bracket and unplug the connector on the bottom that is for the level sensor, this will allow you to move the bottle around.

       Leave the lines connected to the coolant bottle, lift and move the bottle to sit on top of the plugs. With a 12mm socket remove the bolt holding the front cover in place. After the bolt is removed, lift and pull the cover up and out of the way.

       If you follow the gas lines back and down they are held in place with a bracket and 10mm bolt, remove the bolt and now the lines will be a lot easier to move around.

       Gently push the fuel line back a little and work a 10mm socket in and remove the two bolts that hold the top of the cover plate in place. Once the bolts are off leave the cover in place for now.