How to check to make sure timing on GMC Sonoma is right
I have a GMC Sonoma with a 4 cylinder. I was replacing the timing chain and when I went to put on the gears found the timing mark 180 degrees off. I can't remember when it turned but I know it didn't turn while it was off. Just wanted to check to make sure I didn't screw anything up. How do I check to make sure the timing is correct (the timing marks are now turned correct) I need to know that somehow the gears didn't turn and while they say they are right the Cam shaft isn't wrong. Engine is out of truck and oil pan is off. I am also a 16 so please dumb it down enough for me. Thanks.