stonerboys
Member
- Joined
- November 14, 2010
- Messages
- 25
- Reaction score
- 0
- City, State
- Pennsylvania
- Year, Model & Trim Level
- 99 Sport
Hey guys I need a little help, I have a 99 Explorer Sport with the 4.0 OHV V6 in it and its making this loud sound that sounds almost like a bird chirping that seems to be coming from one of the back 2 cylinders on the passenger side valve cover. Its not too bad at idle, but when you drive it it gets really loud. It makes several different, high pitched squeaking sounds. I'm thinking that its maybe a rocker arm or lifter making noise? Do these motors have roller rockers in them? My explorer is about to turn over 143k miles, but im afraid to keep driving it with it making this noise. I appreciate any help you guys can provide me with. Thanks!