Should I have my timing chain replaced?

You are way past due to have the chain changed and have been very lucky to date...

Have you asked a GM rep or checked the recommended maintenance schedule? 100k on a timing chain is not unusual and it will probably last another 100K unless it is made of non-metal material as some imports are. I would go ahead with your upgrades after getting someone who knows this car to verify what I said. GM cars do not typically require timing chain replacements during their normal life. I currently own 2 with over 150K and I am not concerned about the timing chain in them.

Jim - I have been using a K&N filter on my F-150 for years without problems. I have noticed that my engine oil seems to stay cleaner longer though!

Thanks for all your help guys. I talked to my mother's husband who has worked at the Lordstown Ohio GM plant for over 20 years. That's the one that made most of the cavilers and the cruze for Europe and Asia before it was available in America. They didn't make the Ecotec there, but had them shipped in by the truckload. He said he's never even heard of somebody replacing the timing chain on one. He said those cars rusted out before any major problems ever occurred with the engine. Also my uncle had a 2003 cavalier that he bought new and put 260,000 miles on it in 8 years and it was heavily modified and he beat the heck out of that car, plus the guy ways over 320 pounds, and he said he never had a single problem with the engine. He sold it so somebody that lives nearby and it is still on the road. So I now know that the timing chain is the least of my concerns. My stepdad said that the most probable reason for the timing chain going bad would be for someone driving the car very hard all the time while going extended periods of time without changing the oil. I do neither of those things, so I am no longer worried

I agree. MeandMe you, all due respect, are mistaken

C15425 as long as you are not in Calif, I don't know about other States but a CAI is considered 'tampering' and you will never pass smog inspection. Best of luck with your project

I once had a car for a short time, I can't even remember the Make. Or Model or year.. I only had it about a month. But it had a flex hose, a big one, maybe 2 inches diameter that was attached to the exhaust manifold and went up to the intake stream. I never did figure out what it was there for. But I think I just learned.