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Slight tick only when engine is warm

My 5.7 and 6.4 both had the hemi tick from the start, I've had the Hellcat block for about a year and just developed a slight tick on the drivers side.  I don't hear the tick until the engine is at operating temperature, while parked if I press the gas the tick goes up with RPM until the exhaust drowns it out.  I don't have any performance loss and didn't see any real knock when I did my last data log.  The shop that did the install said they don't think it's anything to worry about.  Anyone have ideas on what the noise could be?  I don't want to tear into the engine if I don't have to, the plan was to upgrade to a whipple this winter.

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