It's the D16A9 valvetrain louder than other d-series? - D-series.org

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Old 02-23-2015, 09:18 AM   #1 (permalink)
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Default It's the D16A9 valvetrain louder than other d-series?

Hi! I've noticed that my girlfriend car engine (EK3 with D15Z6) it's not that loud compared to my DOHC ZC. Mine is 190.000km and her d15z6 only have 85.000km. It's only for the difference in mileage or it something diferent with the DOHC ZC valvetrain??

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Old 02-23-2015, 09:20 AM   #2 (permalink)
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What is the valve lash set at?
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Old 02-23-2015, 10:29 AM   #3 (permalink)
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I adjusted the valves a week ago. I think it was 13mm and 15mm, just at the middle of the setup told by factory. It's not a rare sound, only that the dohc zc its louder than the d15z6. May be the injectors a factor too??
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Old 02-23-2015, 11:12 AM   #4 (permalink)
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There should be a decimal in those numbers somewhere.
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Old 02-24-2015, 01:14 AM   #5 (permalink)
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Intake: 0,13 - 0,17 mm (0.005 - 0.007 in)
Exhaust: 0,15 - 0,19 mm (0.006 - 0.008 in)
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Old 02-24-2015, 03:31 AM   #6 (permalink)
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yep I'd say they are a bit louder that sohc
I always did 0.15mm in 0.2mm ex
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Old 02-24-2015, 06:25 AM   #7 (permalink)
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They are a different style of valve actuation then the SOHC's are.
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Old 02-25-2015, 04:00 AM   #8 (permalink)
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Thanks to all!! I compared to a d16a9 of one friend and mine it's a bit silent than his engine. It's all okay!!
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