I have an 85 735i with some minor problems. Has anyone experienced: 1. Chatter in a relay activating the heat as the car is coming up to temperature. Sometimes it clatters with the turnsignal on,other times all by itself. If the air volume wheel is left at 0 until the car is warm it will not do it. 2. I noticed some play in the clutch fan, perhaps 3-5 mm at the outer fan blade, not including blade flex. Is this excessive or be a reason for concern? 3. Regular spark plugs vs. platinum. I put in a set of platinum plugs and gapped them the same as the regular plugs. The car ran better but only for a short time. Did I make a mistake? Kudos to all you out there who are willing to share your knowledge and expertise with those of us a litte more green.