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So am I hearing GDI "Tick"?

BenchTest

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I haven't been able to see a specific chat going on here addressing this, so I'll ask. I have a '21 5.3L that has a low-volume, defined, rythmic "tick, tick, tick" about once every 3/4 of a second. Is this the side effect of a GDI engine and it's high pressure fuel pump? Guessing it's normal on these engines? Thanks folks!
 
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BenchTest

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Roller tick? As in roller lifter? That'd be a hard pill to swallow at 83 miles. It does not change between hot/warm/cold, nor does it change cadence with RPM.
 

beezer1519

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Then not that. If it’s not changing with temp or RPM. Where is the sound coming from? Is it at idle or does it persist when in gear?
 
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BenchTest

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If the engine is running, it's present. I'm sure it's still there at higher RPM, but with engine revs, I lose the ability to hear the noise. It's not loud enough to hear over everything else.
 

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