Lost the timing belt on 2004 aveo, has 64000 miles on it, bent all the valves(how come this isn't a noninterference motor?)can't find valves, chevy dealer has 5 need 16, no parts stores can get them, no rebuilder can get them, can't find a rebuilt head, so i bought a used engine from a salvage. Now here is my dilema, do i replace the head or whole engine? Bear in mind, i don't know if i can obtain gaskets yet.
Just go to any junk yard and find a used deawoo lanos and pull the head if timing belt was not broke, if it looks good, its a exact fit 100%, no special tools needed, just normal wrench set and torqe wrench. after head is installed, get a gates timing belt only.
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niceugot2see, If your vehicle is an interference engine then there is a chance that a few valves got bent when the belt broke. The engine should be fine but, the valves in the heads will have to be checked for any damage. If they are, you will have to make a decision to either replace the damaged valves and guides or the entire head. I believe that it is cheaper to replace the head than to pay for the labor to replace the valves and guides. Good luck with this.
I just wanna know how was it possible for him to know the (hidden under the cylinder head cover) valves were bent while only changing the timing belt and water pump ( both located at the side of the engine).
Hello momma_green: My name is Roger and I will help you. The 2005 Chevy Aveo 1.6 engine is a interference motor. That means if the timing belt breaks.The valves will be bent. I have one in my shop now that the belt broke on it. Bent all 16 valves and damaged all 4 pistons. This is not a forgiving motor. I wish I could tell you good news but I cant. Should you need further help please just ask. Please rate the answer you received. Thank You for using Fix Ya. Roger
Do you have a compression tester. If there is truely no compression you messed up the head big time. If you have compression then yes, you could have not truely been at TDC, but instead like you said, 180 degrees backwards. If the timing chain broke you could have bent valves. Smaller engines have an interference between the piston and valves. When the piston is up the valves must be closed or they will hit. When the chain broke this could have happened.
the timing belt should be changed every 60,000 miles.
your engine is an interference engine, which means if the timing belt breaks or skips, the valves will hit the pistons.
if your belt broke you will have bent valves. so the heads will need to come off and bent valves replaced.
At 60,000 you should have all the major things done if you haven't already:
oil change(every 3000)
air filter change(every 15,000)
coolant flush(every 30,000)
spark plugs and wires(every 30,000)
transmission fluid & filter change(every 30,000)
brakes (as needed)
PCV valve (every 20,000)
You can wait until about 75000 miles to do your timing belt.