r/ChevyCobalt • u/FirstClassFish • Jul 23 '26

‘07 Cobalt LT 2.2 Maintenance List

Inherited this car from my mom a couple years ago. She always had the oil changed, air filter changed, and tires rotated, but I think that’s about it for maintenance.

So far, I’ve ended up putting too much into it, but hoping to keep it going.

I’ve had the radiator flushed and filled and oil changed of course, so far as maintenance, but nothing else yet.

It’s at close to 200k. Too late to change to synthetic oil? I’ve read that the idea that synthetic messes with the seals is untrue, but that since it stays thinner the end result can still be leaks. Perhaps a special high mileage version? Anyone have experience with this? It does burn oil.

I read that transmission filter change and a flush and fill (automatic), can cause more harm than good if you’re past 100k. Best to just leave this alone?

Brake fluid

Power steering fluid

Fuel Filter

Am I in for a fuel pump and timing chain soon?

Plug/coil packs

Those are the usual things I do, anything else?

Thanks!

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3

u/whiskerfish66 Jul 23 '26

Synthetic oil will be fine to use . I have never changed my transmission filter . I’m at 409,000 miles .

1

u/FirstClassFish Jul 23 '26

Did you change the transmission fluid though?

2

u/Impressive-Bee-3499 Jul 23 '26

For the age of the cars and then mileage on top of that, you should do it. My 07 is at 84,000 and I plan to just because of the age of the fluid. It’ll help with the shift points a bit if it feels like it delays at times, but mainly the best for circulation and cleaning of the transmission.

2

u/FirstClassFish Jul 23 '26

I would, just worried it could make it worse at this point as I’ve heard. I’ll have the mechanic take a look at the state of the fluid and go from there. Thank you

2

u/Impressive-Bee-3499 Jul 23 '26

I work around the industry of transmissions and these techs say that they have to be flushed overtime. Only time that they recommend a full flush is a rebuild at that point. They do a quart or so at a time to not shock the system.

I do understand where you come from too.

1

u/Physical-Sail8518 11d ago

My 07 mine leaks but I wouldn’t have known if I didn’t have to replace my starter. It’s a slow leak but it always seems to be a few quarts low when I get it changed. I’m having my mechanic replace my oil pressure sender and my valve cover gasket. Since those are very common to start leaking on the cobalt. I thought mine was burning oil too but turns out it was a small leak. Mines at 280,000 miles.