Question about 2004 Hyundai Santa Fe

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Blue smoke when starting frist thing in the morning

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This usually indicates worn valve guides. When the engine sits for a period of time, the residual oil sitting in the cylinder head will seep down the valve stems past the seals and guide and into the cylinder. When you fire it up the little bit of oil burns off giving you the blue smoke. Usually clears up right away.

When the guides get worn and theres some play in the valve stem, it stretches the seals a little too so they nolonger seal very well and allow the oil to seep past.

You can replace the seals for a temporary fix, but will not last long as the play will stretch them again. Whats needed is a valve job. Not a quick fix. The valve guides need to be reamed and honed to resize them to fit the valve stems correctly to eliminate sideways play, then the valves ground and reseated and fitted with new stem seals.

Having said all that, if the smoke clears in seconds, you can keep going for a while yet. A little oil burn wont hurt much. As the wear gets worse the smoke will persist longer till it never quite goes away and you leave a trail behind you. Depending on your usage, (and how bad now) this could be 6 - 9 months away.
Hope I have helped.

Posted on May 23, 2011


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