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Showing results for tags 'cam bolt'.
Help! I'm in the final stages of rebuilding a 72' 240Z. The Cam timing sprocket bolt has now come loose for the second time. The first time I pulled the head and had two valves replaced. (Also got a good bit of hazing about proper torque...) Replaced everything and torqued the cam bolt to 105 ft/lbs. Two short test drives, everything just fine. First longer drive, she stopped running about two miles out and when towed home, the cam bolt has loosened again. (Cam stopped spinning, pinged the top of several pistons, now need to remove the head and get valves inspected/replaced... a