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2003 trailblazer: 000 miles..I start it up the valves click what can I

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I have a 2003 trailblazer with 80,000 miles sometimes when I start it up the valves click what can I do and is this a bad sign?
Submitted: 8 years ago.
Category: Chevy
Expert:  GM Expert replied 8 years ago.



Thanks for using JA,


Well the valves are really not making the noise in the engine. What is happening is the lifters are not holding pressure and bleed down when the engine is off. After a few minutes of running they pump up. One thing you can try is run a thicker oil in your vehicle. Is this a bad sign, well over time it will get louder and your vehicle will start to run rough. I would have it looked at in time and ensure you dont damage anything internally. Let me know if you have any other questions.


Thanks msgtperrin

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