Weight loss happens fast after gastric sleeve surgery: 1  Month 3: About 1/3 of excess weight is gone. 2  Month 6: About half of excess weight is gone.  Month 12: Up to 70% of excess weight is gone.
Allow your engine to cool for 3 to 4 hours before changing your spark plugs. They can be extremely hot if you do not allow enough cooling time. On most vehicles, you should replace your spark plug wires at the same time as your spark plugs.
Spark plugs need replacing when a car has trouble starting or accelerating or when the engine misfires, surges or produces a rough sound. Vehicle manufacturers offer recommendations for changing spark plugs that can be between every 30,000 miles and 100,000 miles, depending on the type of plugs.