timing chain

'07 cobalt LS 2.2 L ecotec; 70K miles Car had chain noise on startup, so I decided to replace the tensioner. This was straightforward, until I took the old one out. It had come apart, and when the housing and spring were removed, the piston appears to have fallen. From what I've seen of this...

'07 Cobalt LS, 70K miles ... which has what I suspect is chain noise: 'tinkling' after a cold start, that goes away after about a minute. (It also has a bad water pump, which is noisy with a listening stick. But, the water pump noise doesn't sound like the 'tinkling', IMO.) Thoughts: 1. If...

Hello everyone. Hopefully this is the correct place for this. If not please let me know. I have a 2009 Cobalt LS XFE with 147,560 miles. I bought it about 5 years ago with 72,000 miles and have always performed routine maintenance (oil change every 3,000 miles, spark plugs, air filters, etc...

Hey, Just replaced my waterpump after finding it damaged and now I am having a problem with overflow in the surge tank after running the engine at 2500rpm for about 3 mins. It doesnt look like the engines is overheating though. Its not a head gasket problem. After removing the heater core...

Just when I thought I had my cobalt sorted it starts making weird noises. Video link below. The noise seems to come from the timing chain area. I replaced the timing chain/guides/tensioner 12k miles ago, the car's at 127k now. I just took off the valve cover, there's no slack on the timing...

I own a 2006 Cobalt LS with 70,000 miles of northern New York driving (Snow and salt). I have a front driver side wheel bearing going bad. My shocks are all in need of replacement too, and I though I might as well do the timing chain while the car is on jacks. The u joint on the intermediate...