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Loose valves will not cause higher oil consumption. It would be worn guides or worn seals. In my experience the valves do not need to be adjusted as often as most on this board suggest. (Probably get flamed for this comment) I've never had a valve tighten over time, which would be the worst case scenario. Don't see how this is possible as I have never had any screw tighten over time.

In my experience the valves that become loose have only become loose by .001" to .003" and only make some noise (clatter). At this point I will adjust them.

I have read other posts that have insisted that their valves tightened over time???? I guess the valve stem could stretch but I have never seen this on one of my cars.

Would love to hear more comments from more experienced gearhead types.

Rahl