Quote:
Originally Posted by Westlotorn
I see a couple people have changed the valve stem seals. Did you look inside the intake manifold prior to doing this job to see if you really needed Valve stem seals?
If your intake was wet with oil your issue was not valve stem seals.
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Yes, there were blow-by deposits just behind and beyond the throttle body: degraded oil, dark brown soot, etc. The backside of the throttle body and its butterfly valve were both heavily coated with same. As part of the service work, I flushed the valve cover's PCV passages and the three-connector PCV hose with solvent to clean away as much blow-by gunk as possible; the throttle body got a thorough cleaning as well.
I don't believe the smoking had any anything to do with air leaks. The valve guide seals were in bad shape, it smoked. Now they're new; it doesn't smoke any more.