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Replaced Timing Belt

2 messages,  Last post on Jan 14, 2009 at 8:24 PM

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#1 of 2 Replaced Timing Belt by premad Nov 09, 2008 (3:42 am)
Just wanted add a post about changing a timing belt on an 05 Aveo.   It is pretty simple but you need the right tools. I purchased aftermarket parts (timing belt, idler pulley, tensioner pulley and water pump for $170.00) and they fit like a fine tuned glove. They guy I bought the kit from gave me a copy of the instruction from the GM manual which helped a lot. Some things to note for the DIYers.   You will need to remove the engine mount in order to get the belt off which was not noted in the instructions but real simple. When removing the motor mount you will need to put a jack under the motor so it does not fall to the ground!! I used my jack and put a 2x4 across the oil pan and AC unit to hold the motor up.   If you replace the water pump in the process you will need to pull off the rear timing belt cover which is a pain and the upper bolts need to come off which are behind the top cam gears. So before you remove the belt spin the gears and remove the 2 top bolts then remove the belt!   Note that when you pull the belt off, the top gears move out of position by 1 tooth and the car will run like crap if this happens. Happened to me on the first try!!! What I did was, I put the belt on the bottom gear first then slide it on to the top right cam gear and then aligned the top timing marks back up by rotating the left gear in place and then slid the belt on the left gear. Took a couple tries until I got the hang of it but was not too bad.   Another thing to note is you NEED the water pump tool or you will not be able to tighten or loosen the timing belt. I bought a Daewoo version of the tool which was 70.00 vs 112.oo gor the GM tool and it worked perfect! It is a 42mm wrench and is bent so you can get a rachet on it. The tool is a must have along with a tourqe wrench if you are going to replace the belt yourself. Don't forget to have a 5mm allen wrench on a socket so you can tourqe the water down.   Hope this helps other DIYers!
#2 of 2 by alsehendo Jan 14, 2009 (8:24 pm)
A couple open end wrenches and a friend to turn the cam gears in opposite directions from above with the belt on the cam gears will help line up the marks on the cam gears. With the belt tight across the top of the cam gear and thing lined up its easy to use the tool to tighten the belt bellow by rotating the water pump. Since the water pump is covered under the 100,000 drivetrain warranty and the belt has to be changed 60,000, I could not bring my self to change the pump and just changed the belt.   If you mash your valves in this interference engine and the belt was not changed 60,000 your 100,000 mile drivetrain warranty means squat, but they will let you change your own belt. They told me just keep your receipt for the belt to prove you changed it.

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