Hello everyone, my daughters Chevy Cruze is driving me nuts. Here's what is happening.. I took it to Jiffy Lube for an oil change in July 2019, took it back to her to drive home. When she got home it seemed like the exhaust was coming out of every crevice in the engine compartment. I called a mechanic friend of mine to help with troubleshooting. He said the catalytic converter seems to be the problem. So we replaced the upper catalytic converter along with the V-Clamp since there was a rattling noise also. Smoke went down a lot but did not disappear completely. Also it sounded like there was an exhaust leak somewhere in the engine... loud. My mechanic friend decided to take the car for a spin to see if he could hear or feel anything out of the ordinary. He came back and said it was sluggish on acceleration and suggested replacing the timing chain since this could cause the exhaust smoke and acceleration problems if the timing had slipped. We just finished that job the acceleration seemed to be a little better but not great. New problem though, it is smoking like Willy Nelson, but the smoke is white and moist. I just filled up the system with antifreeze and it stinks. The loud engine noise is still present like we are running straight pipes off the exhaust manifold. His suggestion was a head gasket issue or a head issue to address the white smoke, but unknown about loud noise or acceleration. Anyone here come across this issue or have recommendations? The car is a 2011 Chevy Cruze (of course) 1.4L Turbo engine with 76,000 miles. Any help or suggestions would be greatly appreciated.