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Old 01-16-2020, 06:12 PM   #1
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FR-S engine rebuilt and knocking

So I recently had my fa20 engine almost completely rebuilt and close to the end of the break in period I started hearing knocking so I used my mechanics stethoscope and it sounds like its coming from driver side cam box so then I brought it back to the mechanic and he says it's nothing, now I haven't had this car long but I'm sure it didn't sound like this before
anyone have any ideas?
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Old 01-16-2020, 06:35 PM   #2
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Sounds like the high pressure fuel pump or valves. Sounds normal to me.
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Old 01-16-2020, 06:46 PM   #3
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I donít hear any knocks , or abnormal sounds .

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engine hardware, engine issue, engine knock

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