It only has to be replaced if it breaks, or it starts making lots of noise. It can technically wear out, at which point the timing could be thrown off, but it's such a PITA job that periodic replacement is not recommended.paul33kane said:doesn anyone know if the timing chain on the v6 has to be replace at a set interval or not if so does anyone know what the interval is thanks.
Hello Tom, the 2.3L is an 'interference' engine and uses a timing chain. That bad is there is NO key-way on the crank pulley. So have to go thru a couple extra steps to be sure it is timed.tomw said:The v6 timing chain has a couple of guides that have plastic surfaces that can wear out. I believe at that time, the chain will start to make more noise. The chain also has tensioners that use oil pressure to push a 'pad' out, a step at a time, to compensate for wear and concomitant loosening of the chain. The 'step' allows the tensioner to stay relatively tight when the oil pressure goes away at engine shutdown. When more wear or loosening occurs, the tensioner can walk up to the next step, and rest on it when at ease.
I think the engine with a timing belt is what is called an 'interference' engine, and that means that the valves will run into the tops of the pistons, or vice versa if the belt fails. It is a LOT cheaper to replace the belt before allowing it to fail.