Re: Excessive oil consumption on the 2010 2.4L
DESPITE HAVING TO INSTALL A NEW ENGINE, I AM SATISFIED WITH HOW GM HANDLED THIS ISSUE
My wife complained a week ago that her 2010 GMC Terrain (70,000 miles) was very noisy, sounded "like a diesel". I thought maybe it was a batch of bad gas, the 10% ethanol taking it's toll after a couple years, or perhaps the recent cold spell (it got down into low teens in mid Nov). Thankfully she wasn't driving it Thanksgiving week since she flew home to see her folks, so I scheduled it into the dealer right before the holiday. They had asked if I had any warning lights or messages -- NO. I also had recently received the "Excessive Oil Consumption" letter from GM. Wednesday morning, as soon as the service writer heard the engine idle, he said it sounded like something having to do with the timing chain. They told me later that day it was 2 quarts low on oil & only a couple thousand miles since last oil change, so it was definitely losing oil (but I saw no evidence of this on my garage floor, nor had it ever had high oil consumption as far as I could tell). Also told me they suspected a problem w/timing chain and it would be a serious repair, up to possibly including a new engine (at zero cost, no deductible). Got a call on Saturday morning to advise that the engine swap was necessary and had been completed on Friday. Turns out the timing chain guide had broken apart and bits & pieces of it were circulating through the engine (service notes show serious scoring inside the cylinder). Would not have gone much further without some breakdown (timing chain, oil loss, etc.) The only charge I had was for the oil change which apparently was done on the new engine (I would assume they ship crate engines dry, not sure why GM wouldn't pay for the oil, but I was happy to pay only $26 for a new engine!).