grizzlyjosh
Registered User
Hey Folks, I've been having a knocking noise coming out of my exhaust that I have traced to a bad valve guide on the #5 cylinder. The thing is, about 10,000 miles ago, I was having similar issues and had the heads checked out at a machine shop. The guy cleaned up the couple of valve seats that needed it and checked everything else and said they were good to go. I'm not sure which valves he worked on but the truck ran beautifully for a while until this knocking started. So, whats more likely, the machine shop let me down, or something else caused this valve guide to go bad. I guess I'm trying to decide whether to pull the other head out as well and have them both looked at by a different shop. Or if I should dig deeper into the guide failure and troubleshoot that. Or both.
Also, the valve guide got bad enough that it wasn't closing far enough and made contact with the top of the piston. What kind of damage could this have caused/what do I need to check on?
Also, the valve guide got bad enough that it wasn't closing far enough and made contact with the top of the piston. What kind of damage could this have caused/what do I need to check on?