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I think it could be your donut gasket or a small hole in the exhaust pipe.

You may also need to change the oil. If the oil has not been changed for an extended period of time, the dirt and debris that accumulates in your oil will block the passages to the hydrolic lifters causing them to run "dry".

Be caution with the ticking noise, I once got a good, loud ticking noise in myne and it turned out to be a stuck lifter! Not replacing a stuck lifter can blow your engine.

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โˆ™ 2015-07-16 18:21:02
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Q: If a 1993 Mercury Topaz has a ticking sound for months now and not just when accelerating and you have recently started to smell some kind of exhaust leak but the car runs perfectly fine what could be wrong?
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