Knocking normal?

370zFORme!! · 04-30-2010, 11:54 AM

Quote:

Originally Posted by ryanboy

i cant tell on your video with the noise but i think i have a similar issue. but my knock is like every 3 seconds or so... if i put my hand on top of my engine i can feel the knock every 3 seconds.

By your description, I don't think we have the same issue. You are saying it happens every 3 econds or so correct? Try and post a video. My sound is more of a ticking sound and it happens throughout the RPM range and gets faster as RPMs increase. I have noticed this only happens when the engine has been run up to operating temps. The sound is also very apparent when I turn the car off and let it start cooling down and turn it on in the middle of the cool down process. The field service engineer said it was running within factory specifications and that nothing could be done about the ticking. Since switching to redline synthetic motor oil, and getting an F1 exhaust, I barely hear it anymore unless I try to listen for it. Redline really helped immediately, but the ticking noise comes and goes at its own discretion. Hope that helps.

ryanboy · 04-30-2010, 01:45 PM

i have been paying more attention to my engine and this rarely happens now but sometimes it does. its so weird.

ryanboy · 05-03-2010, 07:26 AM

ok i did a video with sound using my phone... i can hear it when you listen near the front tire and on top of the engine. i dont know if this is normal or loud enough but check it out and let me know what you think.

its only 38 seconds and its dark in my garage but what i did was put the phone near the front tire then moved the phone to the engine.

Nismo :: Nismo knocking video by ryanboy20 - Photobucket

370zFORme!! · 05-04-2010, 10:26 PM

Quote:

Originally Posted by ryanboy

ok i did a video with sound using my phone... i can hear it when you listen near the front tire and on top of the engine. i dont know if this is normal or loud enough but check it out and let me know what you think.

its only 38 seconds and its dark in my garage but what i did was put the phone near the front tire then moved the phone to the engine.

Nismo :: Nismo knocking video by ryanboy20 - Photobucket

Yup same issue I have, and nobody seems to have found a solution to it. Good luck.

m4a1mustang · 05-04-2010, 10:51 PM

There isn't a solution for normal. Both your engines sound fine and perfectly normal. These things are noisy... just have to get used to them.

tonybui · 05-04-2010, 11:21 PM

Sorry for hi-jacking your thread !!

When I go very slowly while in 1st and I depress the clutch to neutral, there would be a big "thud" sound like something is lose. WTF is that ?? is that normal ?? Need help guys, please comment

m4a1mustang · 05-05-2010, 06:35 AM

Quote:

Originally Posted by tonybui

Sorry for hi-jacking your thread !!

When I go very slowly while in 1st and I depress the clutch to neutral, there would be a big "thud" sound like something is lose. WTF is that ?? is that normal ?? Need help guys, please comment

Very normal. There is slack in the drive train, so when you go from a loaded state to an unload state as you describe, you will get that sound as there is a "shock" to the system. It's totally normal.

efuseakay · 05-05-2010, 01:15 AM

That's just how these engines sound. Nothing to worry about.

04-30-2010, 01:45 PM	#2 (permalink)
ryanboy Base Member Join Date: Mar 2010 Location: Chicagoland Posts: 201 Drives: Red z34 09 0060 Rep Power: 16	i have been paying more attention to my engine and this rarely happens now but sometimes it does. its so weird. __________________ Slut RED Nismo Z34 2009 #60

05-03-2010, 07:26 AM	#3 (permalink)
ryanboy Base Member Join Date: Mar 2010 Location: Chicagoland Posts: 201 Drives: Red z34 09 0060 Rep Power: 16	ok i did a video with sound using my phone... i can hear it when you listen near the front tire and on top of the engine. i dont know if this is normal or loud enough but check it out and let me know what you think. its only 38 seconds and its dark in my garage but what i did was put the phone near the front tire then moved the phone to the engine. Nismo :: Nismo knocking video by ryanboy20 - Photobucket __________________ Slut RED Nismo Z34 2009 #60

05-04-2010, 10:51 PM	#5 (permalink)
m4a1mustang A True Z Fanatic Join Date: Feb 2009 Location: Northern VA Posts: 55,385 Drives: on two wheels Rep Power: 6963	There isn't a solution for normal. Both your engines sound fine and perfectly normal. These things are noisy... just have to get used to them. __________________ - Steve Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!) LIKE us on Facebook!

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05-04-2010, 11:21 PM	#6 (permalink)
tonybui A True Z Fanatic Join Date: May 2009 Location: Maryland Posts: 1,397 Drives: 09 Sports 6 Speed Rep Power: 428	Sorry for hi-jacking your thread !! When I go very slowly while in 1st and I depress the clutch to neutral, there would be a big "thud" sound like something is lose. WTF is that ?? is that normal ?? Need help guys, please comment

05-05-2010, 01:15 AM	#8 (permalink)
efuseakay Enthusiast Member Join Date: Mar 2010 Location: The DAYNGA ZONE! Posts: 404 Drives: 2010 G37xS Sedan Rep Power: 16	That's just how these engines sound. Nothing to worry about.