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Without further information (whether the noise goes away immediately or after warm-up) there are two main causes of such a (ticking) sound. One could be a valve lifter which "bleeds down" at shut off and requires some time to re-fill with oil after cold start. The other could be a cracked piston, the noise of which disappears after warm-up. Either require serious amounts of labor to repair. The lifter problem is, at worst, annoying and will not result in serious harm if not dealt with immediately. The piston problem is much more ominous. If the piston fails, it will likely result in serious engine damage which may require engine replacement. Finding the broken piston is easy. Just disable the spark plugs one at a time until the noise stops. Which ever cylinder has the firing load removed will be At Fault. Good luck J. Kline

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Q: Chevy 5.7 liter engine ticking noise at cold start?
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