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I had the same exhaust leak on my 22re.. When I replaced the head gasket I figured that it was a good time to figure out why the exhaust was leaking, you could even see the carbon buildup all around the gasket. Turns out the two studs farthest from the front of the engine were stripped out and weren't tightening down enough. I just picked up a Helicoil kit and fixed them right up. No more tick. According to the guy at the dealership I talked to, it actually happens fairly often. Might be your problem..
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