Question about 1999 Chevrolet Blazer
Hi depending on the amount of miles that are on your vehicle, it may be the engine has loose clearances, and the oil may take time to pressurize enough, and the engine to warm up enough, for the noise to go away. If it is a deep thud noise, it could be lower end wear. If it is a light tapping, it could bein the upper end. These are examples of worse case scenarios. On a lighter note, oil level is crucial, and some aftermarket oil filters do not have a bleedback valve in them, causing oil to drain comletely back into the pan, when the engine sits. A known good filter, such as a factory ac, will have this valve. I would suggest an oil change, with an anti bleedback filter, to see if this improves. If not, possible excessive clearances may cause this. Additives may actually cause other issues. If the noise does not lessen with an oil change, I would get an opinion from a reputable garage. Good luck...Coop
Posted on Oct 05, 2010
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Posted on Jan 02, 2017
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