Nissan 370Z Forum

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-   -   tapping noise at idle (http://www.the370z.com/engine-drivetrain/124445-tapping-noise-idle.html)

Z_ealot 10-30-2017 04:13 PM
tapping noise at idle
 
I tried searching, but does anyone remember if there was a TSB for this issue, getting the tapping noise after long trips, but as soon as I turn the engine off and right back on again the noise stops completely and engine goes back to running smoothly.

Z_ealot 10-30-2017 10:51 PM
Anyone?


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Cyber370 10-31-2017 04:26 AM
Oil? What type of oil are you using? I know that most do not want to hear it but Nissan recommends Nissan Ester oil to eliminate engine tapping noise in the Z. Just saying.


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Z_ealot 10-31-2017 07:31 AM
Quote:
Originally Posted by Cyber370 (Post 3703980)
Oil? What type of oil are you using? I know that most do not want to hear it but Nissan recommends Nissan Ester oil to eliminate engine tapping noise in the Z. Just saying.


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Using redline already


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barncobob 10-31-2017 07:56 AM
mine had a little valve train noise from new,,put in redline 5w30and it is quiet now...think u are using the best oil already

SouthArk370Z 10-31-2017 10:38 AM
Try some Nissan Ester at your next change. Might help; might not.

Z_ealot 10-31-2017 11:14 AM
Quote:
Originally Posted by SouthArk370Z (Post 3704045)
Try some Nissan Ester at your next change. Might help; might not.


I could have sworn i saw a tsb on this noise, but try as i might i cant find it


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Z_ealot 11-05-2017 09:02 AM
Excuse the video quality, but this is the tapping I am talking about and what it's doing....

http://www.youtube.com/watch?v=4zSAgoSYBZY

Z_ealot 11-05-2017 09:09 AM
Also wanted to add that I've done a little digging around the G37 forums and have seen quite a few of them suggest servicing the oil galley gaskets as it seems on the earlier vq37's there is an issue with the gaskets that made oil pressure drop low enough to set off this condition. going to be swapping out my water pump this next weekend anyways so i'll try it out and update you guys if that resolves the tapping issue.

Wilson2608 11-05-2017 10:03 AM
Yeah that does not sound good. I can hear the tapping noise on mine but it’s probably 60-70% quieter than that.

Z_ealot 11-05-2017 10:24 AM
Quote:
Originally Posted by Wilson2608 (Post 3705008)
Yeah that does not sound good. I can hear the tapping noise on mine but it’s probably 60-70% quieter than that.


I’ve seen a few other videos on youtube floating around that have the exact same noise, but neither the poster of the videos or any of the people responding to the video seem to ever say whether they solved the issue or not


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radix023 11-05-2017 11:37 AM
Does the noise go away when you put the car in gear? Sometimes my car makes a similar noise when I get home (I use a carport and frequently drive with windows open, so get a lot of engine noise bounce) but it seems transmission related as it goes away when I engage the transmission. In my case I think it is a matter of the harmonics of a low rpm idle from a warm engine and the characteristics of the transmission/clutch elements.

Morfiy 11-05-2017 11:43 AM
I’ve challenged the same thing, but in my case it was cracked pulley. So inspect yours, before you pick up heads

Don’t buy/install NST pulley

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Z_ealot 11-05-2017 11:54 AM
Quote:
Originally Posted by radix023 (Post 3705023)
Does the noise go away when you put the car in gear? Sometimes my car makes a similar noise when I get home (I use a carport and frequently drive with windows open, so get a lot of engine noise bounce) but it seems transmission related as it goes away when I engage the transmission. In my case I think it is a matter of the harmonics of a low rpm idle from a warm engine and the characteristics of the transmission/clutch elements.


Tapping seems to be related to oil pressure in my case as when i rev the engine there is no tapping, but as soon as it settles back down to idle where oil pressure is lower when things are warmed up it starts tapping.


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Rusty 11-05-2017 11:04 PM
You need to install a oil pressure gauge. If you get one. Make sure it reads to 150.psi.

Z_ealot 11-05-2017 11:19 PM
Quote:
Originally Posted by Rusty (Post 3705118)
You need to install a oil pressure gauge. If you get one. Make sure it reads to 150.psi.


Will look into it, right now just concerned with switching out the oil gallery gaskets....still cant believe nissan went with paper for the original design on those lol


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Rusty 11-06-2017 12:33 AM
Quote:
Originally Posted by Z_ealot (Post 3705122)
Will look into it, right now just concerned with switching out the oil gallery gaskets....still cant believe nissan went with paper for the original design on those lol


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If you are going that far. Now is a good time to change out the oil pump. Since you're there.

barncobob 11-06-2017 06:06 AM
damn, thats noisy..almost as bad as my dodge ram cummins:}

Dreadnaught 11-08-2017 12:52 PM
Hey op, is the noise coming from the back of the right side cylinder head? I can't view the video at work.

Jhill 11-08-2017 04:00 PM
Damn man it's starting to seem like your having every issue possible with your Z.

Z_ealot 11-08-2017 04:03 PM
Quote:
Originally Posted by Dreadnaught (Post 3705799)
Hey op, is the noise coming from the back of the right side cylinder head? I can't view the video at work.


Seems to switch from right to left sometimes, but yeah most often from the top right of the rear of the engine


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Z_ealot 11-08-2017 04:06 PM
tapping noise at idle
 
Quote:
Originally Posted by Jhill (Post 3705848)
Damn man it's starting to seem like your having every issue possible with your Z.


Seems like it, but most of them are small issues that just piled up from previous owner neglect. I’ve resolved the majority of them, it’s just little things like this and the water pump that are left to sort out. Water pump is being taken care of this weekend


P. S.

Think i may have found what was semi stalling the engine....not sure how it got there, but there was a 1/4 inch sized hole in the bank 2 air intake resonator. Patched it up and engine seems much happier now

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Dreadnaught 11-08-2017 04:22 PM
Quote:
Originally Posted by Z_ealot (Post 3705850)
Seems to switch from right to left sometimes, but yeah most often from the top right of the rear of the engine


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When I first got my Z I heard a tapping coming from the rear of the right side head. I thought I had a valve train issue. It turned out to be purge control valve. That's what you may be hearing. I could hear it if I was standing on the left side of my engine bay but it was a little more quiet. You can put your finger on it and feel it pulsating for every tap.

I think if it was an oil pressure issue you would possibly have advance and retard issue for the intake cam since they are driven by oil pressure.

Hope this helps, I can only do so much over the interwebs.

Z_ealot 11-08-2017 05:17 PM
tapping noise at idle
 
Quote:
Originally Posted by Dreadnaught (Post 3705854)
When I first got my Z I heard a tapping coming from the rear of the right side head. I thought I had a valve train issue. It turned out to be purge control valve. That's what you may be hearing. I could hear it if I was standing on the left side of my engine bay but it was a little more quiet. You can put your finger on it and feel it pulsating for every tap.



I think if it was an oil pressure issue you would possibly have advance and retard issue for the intake cam since they are driven by oil pressure.



Hope this helps, I can only do so much over the interwebs.


That might explain the fuel odors I’ve been smelling then if it is the purge valve lol


Just to clarify though, is it the pcv valves at the front if the engine you’re talking about or the actual purge valve on the canister? Cause i replaced pcv with new oem like a month ago

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Z_ealot 11-08-2017 06:02 PM
Nevermind, think i know what you’re talking about....it’s that stupid valve on the back of the upper intake manifold isnt it?


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Jhill 11-08-2017 08:56 PM
Quote:
Originally Posted by Z_ealot (Post 3705851)
Seems like it, but most of them are small issues that just piled up from previous owner neglect. I’ve resolved the majority of them, it’s just little things like this and the water pump that are left to sort out. Water pump is being taken care of this weekend


P. S.

Think i may have found what was semi stalling the engine....not sure how it got there, but there was a 1/4 inch sized hole in the bank 2 air intake resonator. Patched it up and engine seems much happier now

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Makes more sense of your constant + long term fuel trim too. Seems you found the vacuum leak. It's tough today without a smoke machine, so many sources for vacuum leaks now.

Z_ealot 11-08-2017 09:04 PM
Quote:
Originally Posted by Jhill (Post 3705912)
Makes more sense of your constant + long term fuel trim too. Seems you found the vacuum leak. It's tough today without a smoke machine, so many sources for vacuum leaks now.


What dread mentioned is making sense too, I’ve been getting that ticking/tapping noise for quite a while now and if evap purge valve is the cause it would also contribute to the fuel trim issue as well from what information I’ve gathered


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Jhill 11-09-2017 12:23 AM
Quote:
Originally Posted by Z_ealot (Post 3705914)
What dread mentioned is making sense too, I’ve been getting that ticking/tapping noise for quite a while now and if evap purge valve is the cause it would also contribute to the fuel trim issue as well from what information I’ve gathered


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No the tapping is from the Evan purge sol duty cycle being commanded on and it normal, they can be loud. Had many Acura customers thing something was wrong with their car but it’s just the purge valve and Acura puts it right by the firewall on drivers side so of course the driver hears it. It won’t change your fuel trim because the ECM is commanding it on and knows to correct for the fuel vapor.

Z_ealot 11-09-2017 12:56 AM
Quote:
Originally Posted by Jhill (Post 3705927)
No the tapping is from the Evan purge sol duty cycle being commanded on and it normal, they can be loud. Had many Acura customers thing something was wrong with their car but it’s just the purge valve and Acura puts it right by the firewall on drivers side so of course the driver hears it. It won’t change your fuel trim because the ECM is commanding it on and knows to correct for the fuel vapor.


Gotcha, thanks for that info! Damn didnt know such a small thing could be so loud lol


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Wilson2608 11-11-2017 10:22 AM
This may sound really obvious and I’m sure you’ve already checked but is your oil low? Low oil will cause those lifters to be loud as hell

1st 11-11-2017 11:49 AM
Check your oil level.

Z_ealot 11-11-2017 01:06 PM
Quote:
Originally Posted by Wilson2608 (Post 3706557)
This may sound really obvious and I’m sure you’ve already checked but is your oil low? Low oil will cause those lifters to be loud as hell


First thing i checked :) also i did as dread said and it is the purge valve that is making that noise. Feel it pulsing everytime it “taps”


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