How do you put on timing chain on 2004 Chevy aveo?

Answer 1

CHANGING THE TIMING BELT Like all timing belt replacement jobs, the timing belt cover on the front of the engine will have to come off. But first you have to get some other parts out of the way. Start by disconnecting the battery. Then remove the intake air temperature (IAT) sensor connector, the air intake tube from the throttle body, the breather tube from the valve cover, and the air filter housing. Next, remove the right front wheel so you can remove the splash shield behind it. With these other parts out of the way, you can remove the serpentine belt, and then the crankshaft pulley bolt and the crankshaft pulley (you will probably need a puller to get the pulley off the nose of the crankshaft). Support the engine safely and remove the right motor mount and then the bracket that is attached to the engine. This will allow the timing belt to be removed and will also allow simple water pump pliers to be used to adjust the belt instead of the expensive special tool J42492! Next, you can remove the upper timing belt cover, then the lower cover. Remove the nut that holds the Power Steering line to the engine near the alternator. Put the crank pulley bolt back into the end of the crankshaft, and rotate the crank as needed to align the mark on the crankshaft timing belt pulley with the notch on the bottom of the rear timing belt cover (the mark should be down pointing at notch in the cover). Be sure that the timing marks on the cams are lined up too! Now you can loosen the water pump bolts and rotate the pump counterclockwise with water pump pliers (tool J42492 is not required as long as the motor mount is removed) to relieve tension on the belt. The timing belt can now be slipped off. Don't disturb the position of the crankshaft or camshaft pulleys until the new belt is in place. As we said earlier, it is a good idea to also go ahead and also replace the water pump, idler and tensioner pulleys at this time, too. Even if no other parts are replaced at the very least put a new water pump o-ring seal on! Once the new parts have been installed, use the water pump pliers to rotate the water pump clockwise to tension the timing belt. Continue rotating the water pump clockwise until the adjuster arm pointer on the automatic timing belt tensioner aligns with the notch in the tensioner bracket. You can now tighten the water pump bolts. GM recommends rotating the crankshaft twice at this point to make sure all of the timing marks are correctly aligned. They also recommend loosening the water pump bolts, and rotating the water pump clockwise again to make sure the tensioner pointer lines up with the notch in the bracket. You don't want a loose tensioner because it might allow the belt to slip and jump time. You also don't want the belt too tight because that can shorten the life of the water pump shaft bearings and seal as well as the timing belt. Once the belt has been properly tensioned and double-checked to make sure the timing marks are correctly aligned, you can put everything back in the reverse order it was taken apart. The recommended torque for the crankshaft pulley bolt is 70 ft.lbs. (95 Nm) plus and angle turn of 30 degrees followed by a final turn of an additional 15 degrees (use a torque wrench and angle gauge to be accurate). Also, when you remount the right front wheel on the car, use a torque wrench on the lug nuts. Even though GM says to replace the timing belt at 60,000 miles its a good idea to do this every 50,000 miles. Much of this is shown here: http://home.earthlink.net/~aveobot/id1.html