Engine Mechanical problem
1999 Ford Contour 4 cyl Front Wheel Drive Automatic 137000 miles
We installed a new timing belt. There were some problems with the previous one to include installing it over a bearing with the pulley missisng, over tightening the tensioner to compensate for the missing pulley, and the melted pulley stuck to the inside of the timing belt cover (it may have rubbed). As we turn the engine by hand, the variable valve timing mechanism starts to lag the exhaust vlaves every time it begins to hit a lob on the cam. The exhaust cam lags further and further behind the intake as you turn the engine, then "pops" when the lobe crosses its highest point. It then goes back to normal position relative to the intake cam. We don't know if this is normal or abnormal, not having ever worked with variable valve timing mechanisms before. This is the double overhead cam, four valves per cylinder engine. Compression was consistent in all cylinders and averaged about 180 lbs.
have the same problem?
Friday, July 16th, 2010 AT 8:20 PM