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Message: <blockquote data-quote="shovel" data-source="post: 1570959" data-attributes="member: 29855">I'm not absolutely sure on what you're describing as a ticking sound,  maybe my speakers aren't good enough it almost sounds like an exhaust leak or maybe like you have a plugged PCV that's rattling or something? The smoking when idle is almost always valve guide seals,  people seem allergic to changing those even though they're cheap and relatively easy and there's no such thing as a 30 year old valve guide seal that isn't blown out like a 90 year old escort.  The reason the exhaust will smoke more at idle is because vacuum is highest and air flow is lowest.   Burning oil will coat your cats and oxygen sensors, neither of which is ideal to be crusty so it's a good idea a few miles after you've replaced your valve guide seals to also replace your o2 sensors.  Also if the "ticking" you're hearing is from the PCV flapping around that's going to be enhanced by blown out exhaust valve stem seals. If you had plans of installing high ratio roller rockers this would be a good time to do that since the rockers will be coming off anyway to replace the seals.</blockquote>