Ticking Sound on top of engine...

wstar · 05-15-2009, 08:36 AM

My previous LS1 and my new VQ37VHR are both a little noisy, and both became even moreso with aftermarket intakes that get rid of the factory sound baffling. You're probably hearing 'normal' valvetrain noise. Slight ticking/clicking, frequency changes with engine RPMs. Normally don't notice it driving, but you'll hear it in a garage or drive-through because it echoes off the nearby wall back into your window.

SiXK · 05-15-2009, 10:31 AM

I agree with the people who said its probably the injectors, they do make an audible ticking noise. My 300Zx does it, my 350Z did it. haven't noticed it on my 370 but probably does it too.

wstar · 05-15-2009, 10:37 AM

Yeah what I'm referring to as valvetrain noise above could easily be injectors too. I don't know what it is honestly, but I hear it and it's normal

NotmyGTR · 05-15-2009, 10:45 AM

Injectors for sure. Have had the same noise with every Nissan I have owned. The only car I didnt here it in had an RB26 bored to 2.8 ltr with huge cams. The rugged idle of the car covered the injector noise.

So its very significant. If the noise changes for you without any moderate or high powerplant mods...........check it out before something expensive goes wrong. Drive your car every once in a while with no stereo on so you can get used to the normal noises of the car. Helps you in the long run with early troubleshooting to diagnose what may end up being costly repairs.

AK370Z · 05-21-2009, 12:17 AM

I have NO ticking noise from engine area. But, after driving more than half hour (meaning cats are fully warmed up), I get a little ticking noise. I am certain it's NOT engine or injector related. It's coming from cat or exhaust area. Camera was placed RIGHT under left cat, car idling.

VIDEO
YouTube - MOV01759

wstar · 05-21-2009, 12:24 AM

Quote:

Originally Posted by AK370Z

I have NO ticking noise from engine area. But, after driving more than half hour (meaning cats are fully warmed up), I get a little ticking noise. I am certain it's NOT engine or injector related. It's coming from cat or exhaust area. Camera was placed RIGHT under left cat, car idling.

Wow, I don't know wtf that is. Can you hear that just standing next to the car, without shoving a camera up by the cat?

The sounds I've been talking about are just subtle repetitive ticks, like a metronome synchronized click-track, that are completely stable (at a given rpm). What you've recorded is something very scratchy and erratic...

AK370Z · 05-21-2009, 12:31 AM

Quote:

Originally Posted by Lyndo

popcorn?

Quote:

Originally Posted by wstar

Wow, I don't know wtf that is. Can you hear that just standing next to the car, without shoving a camera up by the cat?

The sounds I've been talking about are just subtle repetitive ticks, like a metronome synchronized click-track, that are completely stable (at a given rpm). What you've recorded is something very scratchy and erratic...

It's the EXACT ticking sound you get when you park your car in the garage after driving for a while (engine off). But this one is audible with the engine on, right under the cats. if it helps, tomorrow I can take two videos at the same time with one camera under Left and one under right cat. Next time drive your car for a while. When you come home, instead of turning the car off, go outside and look under the cats. See if you hear anything and report back please. thanks.

To answer your question, YES you can hear it up to 2 feet away from car(if it's really quiet out) . Am I overreacting?

rudi · 07-09-2009, 06:29 PM

Quote:

Originally Posted by AK370Z

I have NO ticking noise from engine area. But, after driving more than half hour (meaning cats are fully warmed up), I get a little ticking noise. I am certain it's NOT engine or injector related. It's coming from cat or exhaust area. Camera was placed RIGHT under left cat, car idling.

VIDEO
YouTube - MOV01759

If it makes you feel any better, I have exactly the same sound coming from the under side of my Z. I'm going to have it checked at my next service along with my intermittent trunk not opening and condensation in the tail light.

Rudi.

need4speed · 07-09-2009, 06:19 PM

Quote:

Originally Posted by LSUTurboTiger

I agree with the people who said its probably the injectors, they do make an audible ticking noise. My 300Zx does it, my 350Z did it. haven't noticed it on my 370 but probably does it too.

My cousins g37 does it. My 08 altima 3.5 does it. My sister in laws maxima does it.
So I just think its most likely a VQ characteristic.

05-15-2009, 08:36 AM	#1 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3596	My previous LS1 and my new VQ37VHR are both a little noisy, and both became even moreso with aftermarket intakes that get rid of the factory sound baffling. You're probably hearing 'normal' valvetrain noise. Slight ticking/clicking, frequency changes with engine RPMs. Normally don't notice it driving, but you'll hear it in a garage or drive-through because it echoes off the nearby wall back into your window. __________________ 7AT Track Car! Journal thread / Car setup details

05-15-2009, 10:31 AM	#2 (permalink)
SiXK Enthusiast Member Join Date: Jan 2009 Location: Orlando Posts: 352 Drives: 09 370Z / 91 300ZXTT Rep Power: 187	I agree with the people who said its probably the injectors, they do make an audible ticking noise. My 300Zx does it, my 350Z did it. haven't noticed it on my 370 but probably does it too. __________________ Magnetic Black 2009 370Z / Pearl Yellow 1991 300ZXTT

05-15-2009, 10:37 AM	#3 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3596	Yeah what I'm referring to as valvetrain noise above could easily be injectors too. I don't know what it is honestly, but I hear it and it's normal __________________ 7AT Track Car! Journal thread / Car setup details

05-15-2009, 10:45 AM	#4 (permalink)
NotmyGTR Base Member Join Date: May 2009 Location: TX Posts: 177 Drives: 09 370Z/Pearl 6speed Rep Power: 18	Injectors Injectors for sure. Have had the same noise with every Nissan I have owned. The only car I didnt here it in had an RB26 bored to 2.8 ltr with huge cams. The rugged idle of the car covered the injector noise. So its very significant. If the noise changes for you without any moderate or high powerplant mods...........check it out before something expensive goes wrong. Drive your car every once in a while with no stereo on so you can get used to the normal noises of the car. Helps you in the long run with early troubleshooting to diagnose what may end up being costly repairs. __________________ 1996 Skyline GT-R LM fully tuned by Mines/2006 Nissan Titan 5.6 SE Texas Edition/2009 370 Base w Sport Pkg

05-21-2009, 12:17 AM	#5 (permalink)
AK370Z Administrator Join Date: Sep 2008 Location: NJ Posts: 9,931 Drives: 09 370Z MB Sports M6 Rep Power: 10	I have NO ticking noise from engine area. But, after driving more than half hour (meaning cats are fully warmed up), I get a little ticking noise. I am certain it's NOT engine or injector related. It's coming from cat or exhaust area. Camera was placed RIGHT under left cat, car idling. VIDEO YouTube - MOV01759 __________________ The370Z Signature Pictures ll Want to rock our forum decals on your car? Then click here! ll How to Embed YouTube Videos In a Post STOP! (Hammertime) ll Become a Premium Member Click HERE ll F.A.Q. Are You a Nissan Dealer? Click Here to Become A "Supporting Dealer" and Start Listing Your 370Zs In Our Inventory Section My Monterey Blue Z ll My Exhaust --> My Intake --> G3 Nissan's Official Response Regarding Oil Temp Issue: CLICK HERE Need a Set of Cheap Winter wheels /Tires? Then Visit The Banner Link Below and Place Your Order. You'll Help Keep The370Z Alive.

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