destroyer1362
A work in progress
So I noticed my yukon making a tapping sound, like tapping a pen on a desk, when I start it up. After about 10-15 seconds the tapping gets so quiet I would have to stick my head in the wheel well to hear it. I can live with that though. What's bothering me is the tapping sound comes back when the motor is under load during normal acceleration or just a quick rev to 3000. It was tuned up less then 500 miles ago. Also I have narrowed the sound down to the number 8 cyl. When I listen to the exhaust I hear a good "thump thump" sound, but sometimes every couple of seconds I hear a sloppy exhaust note. I know that sounds dumb but thats the only way I could describe it.
Please tell me I don't need new lifters. Or does this sound like a sticky valve that could be easily fixed?
Please tell me I don't need new lifters. Or does this sound like a sticky valve that could be easily fixed?