Knocking normal?

370zFORme!! · 03-28-2010, 10:02 PM

So I finally was able to get time to post a video of what I am experiencing. I hope that this will in fact go away with time or a couple more oil changes as I have been informed, but none of the other Z's I've heard sound this way. Any knowledge would be really appreciated. So normal sound or not? Doesn't sound so normal to me... Oil temp is sitting right at 200.

IMG_0144.flv video by mmaislife - Photobucket

370zFORme!! · 03-29-2010, 11:49 AM

Anyone?

IDZRVIT · 03-29-2010, 03:22 PM

Sounds normal.

Nick911sc · 03-29-2010, 03:27 PM

Yea, I'm pretty sure last time I had the hood open the ticking from the vvel was the same.

370zFORme!! · 03-29-2010, 03:47 PM

I have an appointment on Wednesday with a Nissan field service engineer. Hopefully he tells me some good news. Double hopefull that my F1 exhaust will cover up the noise. Thanks for the responses guys!

lando76 · 04-03-2010, 12:53 PM

Quote:

Originally Posted by Zat_Zuma

It may come from the same refineries but it's nowhere near the same specifications or have the additives packages as the name branded products. There can be a huge difference in quality specifications and driveability index between the brands. Company brand reputation is huge in the retail fuel market. No name brands don't worry about their reputation only there costs.

Ever wonder where the gasoline/diesel blending mistakes wind up going to?

Point to ponder: Ever wonder why there are no name branded Jet Fuel distribution companies at airports? It's called liability. The Jet fuel companies are responsible and accountable for their fuel quality they put into a airplane. Reputation, accountability and not to mention lawsuits are powerful motivators.

I have learned not to buy something just because its name brand. If anyone really wants to know why they should choose say Chevron over Arco have their gas tested to see whats in it. That is the only way. Otherwise I have a chip for sale that will boost your car 24mpg only 19.95 plus S&H.

j.arnaldo · 04-06-2010, 03:16 PM

The only thing that makes a brand of gas different from another is the additives they pour in them (Nitrogen, Techron, etc.) Otherwise...

mrsleepy1225 · 04-06-2010, 03:17 PM

Quote:

Originally Posted by 370zFORme!!

Ok so, Ive been searching online and on this forum unsuccessfully for answers, I'm hoping someone can shed some light on this for me. I know this topic has been beaten to death about what oil is best for engine knocking, but I have not found my answer yet. Since I purchased my 370z about 3 weeks ago, I've been hearing a slight engine knocking. Almost sounds like a lifter tap. Ive had my first oil change done and they used Nissan Ester oil. They say its normal, but you never know with the dealer these days. I was under the impression from other posts that supposedly Nissan Ester oil helps with these knocking noises. In my situation it has not.

Couple things:
1. Is knocking normal on our cars?
2. Are there any safe additives out there for reducing engine knocking?
3. Anyone else had good experiences with noise reduction after switching to an Ester based full synthetic like Redline, or Motul?

Sorry if these are silly questions, but this being the first $30000+ car I've ever purchased, I'm a little paranoid about excessive engine noise. Any suggestions are appreciated in advance!

I'm using ester oil and i really notice the noise level change. It sounds alot smoother as well!

370zFORme!! · 04-06-2010, 09:33 PM

Well, I haven't noticed any difference from the Ester oil, if that's what they even used my last oil change... I'm switching to Redline this week, hopefully that makes a difference.

ryanboy · 04-29-2010, 01:36 AM

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.

ryanboy · 04-29-2010, 01:38 AM

Quote:

Originally Posted by 370zFORme!!

I have an appointment on Wednesday with a Nissan field service engineer. Hopefully he tells me some good news. Double hopefull that my F1 exhaust will cover up the noise. Thanks for the responses guys!

what did the Nissan field service engineer say?

370zFORme!! · 04-30-2010, 12:54 PM

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, 02:45 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, 08:26 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, 11:26 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.

03-29-2010, 03:22 PM	#33 (permalink)
IDZRVIT A True Z Fanatic Join Date: May 2009 Location: Halifax Posts: 1,659 Drives: '13 CTS-V, '76 Vette Rep Power: 27	Sounds normal. __________________ "America.... still builds rockets!" Vette: 355 cid, 400 rwhp '13 CTS-V Coupe: 6.2L LSA, 556HP

04-29-2010, 01:36 AM	#40 (permalink)
ryanboy Base Member Join Date: Mar 2010 Location: Chicagoland Posts: 201 Drives: Red z34 09 0060 Rep Power: 15	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. __________________ Slut RED Nismo Z34 2009 #60

04-30-2010, 02:45 PM	#43 (permalink)
ryanboy Base Member Join Date: Mar 2010 Location: Chicagoland Posts: 201 Drives: Red z34 09 0060 Rep Power: 15	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, 08:26 AM	#44 (permalink)
ryanboy Base Member Join Date: Mar 2010 Location: Chicagoland Posts: 201 Drives: Red z34 09 0060 Rep Power: 15	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

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03-28-2010, 10:02 PM	#31 (permalink)
370zFORme!! Premium Member Join Date: Mar 2010 Location: SoCal Posts: 1,459 Drives: 2012 6MT STiffy Rep Power: 17	So I finally was able to get time to post a video of what I am experiencing. I hope that this will in fact go away with time or a couple more oil changes as I have been informed, but none of the other Z's I've heard sound this way. Any knowledge would be really appreciated. So normal sound or not? Doesn't sound so normal to me... Oil temp is sitting right at 200. IMG_0144.flv video by mmaislife - Photobucket

03-29-2010, 11:49 AM	#32 (permalink)
370zFORme!! Premium Member Join Date: Mar 2010 Location: SoCal Posts: 1,459 Drives: 2012 6MT STiffy Rep Power: 17	Anyone?

03-29-2010, 03:27 PM	#34 (permalink)
Nick911sc A True Z Fanatic Join Date: Feb 2009 Location: Long Island, New York Posts: 1,698 Drives: 2010 Nissan GT-R Rep Power: 20	Yea, I'm pretty sure last time I had the hood open the ticking from the vvel was the same.

03-29-2010, 03:47 PM	#35 (permalink)
370zFORme!! Premium Member Join Date: Mar 2010 Location: SoCal Posts: 1,459 Drives: 2012 6MT STiffy Rep Power: 17	I have an appointment on Wednesday with a Nissan field service engineer. Hopefully he tells me some good news. Double hopefull that my F1 exhaust will cover up the noise. Thanks for the responses guys!

04-06-2010, 03:16 PM	#37 (permalink)
j.arnaldo Banned Join Date: Oct 2009 Location: Puerto Rico Posts: 937 Drives: Nissan 350Z, 2004 Rep Power: 0	The only thing that makes a brand of gas different from another is the additives they pour in them (Nitrogen, Techron, etc.) Otherwise...

04-06-2010, 09:33 PM	#39 (permalink)
370zFORme!! Premium Member Join Date: Mar 2010 Location: SoCal Posts: 1,459 Drives: 2012 6MT STiffy Rep Power: 17	Well, I haven't noticed any difference from the Ester oil, if that's what they even used my last oil change... I'm switching to Redline this week, hopefully that makes a difference.