I have a 2003 Mitsubishi Montero 3.8L V6. I took it in to have the valve cover gaskets replaced because they seemed to be leaking. The mechanic had it for 4 full days and said after he changed them it was idling very rough and now has a loud ticking/knocking noise as well as the check engine light is on. The vehicle did not have any issues other than the oil leaking. Never ran rough and never had a ticking/knocking from the motor. The mechanic said he didn’t know what was wrong with it. We then took the car back and drove to another mechanic who diagnosed the issue. They said we need the ignition coil and spark plugs and spark plug boots changed. Would the severe knocking and idle happen over night? I just don’t see how we go in for one thing and now have a huge issue that was never there before. Could something of went wrong during the replacement of valve cover gaskets to cause this problem?
Saturday, February 19th, 2011 AT 2:25 AM