Ajbeck_88
New Member
- Joined
- February 20, 2017
- Messages
- 3
- Reaction score
- 0
- Year, Model & Trim Level
- 1991 Ford explorer XLT
Hello, this is my first post here. I had a quick question about my 91 explorer. The other day I noticed it was leaking coolant from the lower intake gasket. I took it all apart, replaced the gasket and valve cover gaskets as well. I filler her back up and started it, I started to hear a rather loud knocking noise from the passenger side valve cover. I shut it off. I wondered if I had left something in there so I took the valve cover and upper intake back off. I couldn't find anything. Put it all back together, started it, the knocking was still there, I let it run and warm up, and the knocking noise went away. I put 70 miles on it and it ran fine. I can't still hear it very faintly, and it does effect the rpm, very little though, maybe 100 rpm. Could this be a vacuum leak? That's the only thing I think it could be.