Blue smoke from my cherokee at 210 degrees - 1996 Jeep Cherokee Sport

Hi there:
I suspect it is a exhaust valve guide problem. When an exhaust guide is loose in the engine or leaking oil, the oil never enters the combustion chamber. Oil drops through the guide and into the exhaust port of the head. The exhaust stream then carries the unburnded oil out to the exhaust. As the exhaust system warms up, the oil then burns off and leaves as blue smoke.

Remove the valve cover and take a flashlight and closely look at all the valve seals and guides, especially the exhaust guides and seals.



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