3.6 or 4.6?
Hey everyone i’m new here I work at a car dealership and an older gentleman traded in a 2008 STS to get a 2018 CT6 and this STS is in amazing condition he was the only owner garage kept its whole life only 84k on it .... my questions are there any common problems with these cars? What are they? When do they tend to happen? And roughly how much is it to get fixed? Because i’m about to buy it for 4500 if everything checks out!!! Any info would be greatly appreciated thank you all
3.6 or 4.6?
3.63.6 or 4.6?
Ya Iv heard in your opinion what are the common issues?Decent price for a 3.6. Just know that that engine is hit or miss.
Start typing GM 3.6 into google and it will auto-fill the most common issues. It's been that big of a deal for that long.Ya Iv heard in your opinion what are the common issues?
The 2nd gen LLT isn't much better...The LY7 is notorious for drinking oil and timing chain issues, for starters.
They can be oil drinkers, which causes timing chain issues. Then the chain tensioner won't recover from being starved of oil. We just had an 08 STS in the shop for running poorly. 3.6, it was 3.5 quarts low and misfiring, rattling badly. Owner got lucky, added oil and half the issues went away. No leaks under the engine anywhere.Ya Iv heard in your opinion what are the common issues?
Both.Is it PCV or rings? Or both?
I actually 3D printed some new gears and got them to last a few days longer than the junk yard replacements. If I get bored, I will laser cut some out of steel and try them out.Those plastic gears in the seat adjusters are so lame, it's like a very soft plastic/nylon which break way too easily. They aren't difficult to replace but metal would be far superior.
Motor mounts are a common replacement and I think they are supposed to much easier on the 3.6 vs the 4.6 but I still wouldn't trade it.
Blend doors become noisy after a while but mine aren't too bad, I don't use my climate control enough to be bothered by it anyhow.
Once the oil starts leaking into those spark plug wells it will eventually kill the coils, although there could certainly be other causes for it.