Always make sure the oil is full. Also, when changing your oil, purchase a quality filter. Some filters allow oil to flow back to the engine. As a result, it takes a few seconds for the pressure to build.
Finally, with that many miles on the vehicle, the lifters may be getting a little weak and take extra time to pump up.
Let me know if you have any questions.
Friday, October 3rd, 2008 AT 11:33 AM