1998 Mustang Gt Strange Knocking Noise. only 104,421 miles!
I hear a strange knocking noise, especially when I start it cold. Before I heard this noise, I do admit, I would run it pretty hard. I change my oil every 3,000 miles with Castrol Syn and I keep up to date with all my fluid exchanges, air filter etc... When I have it at Idle, I rev it between 1300 and 1500 rpm and the engine and steering wheel vibrate pretty hard, when I pass 1500 it idles smooth. The knocking noise seems to be coming from the bottom of the engine. I also have a rear main seal leak..can anyone tell me what the sound may actually be? And am I better off selling it? or actually fixing these problems. I should also add that I changed my oil on Jan 2nd, and when I removed the oil plug, I saw metal shavings. Any help will be greatly appreciated, thank you for your time.