Ticking Sound on top of engine...

zZSportZz · 03-29-2009, 09:14 PM

Being new to Nissan engines...is this normal? I can really hear it going through drive-throughs and stuff. Sorry for the noob question

First car I own that sounds like that.

Musashi · 03-29-2009, 09:36 PM

You mean after you turn the car off you can hear it from the outside and not from the cockpit? It's normal, there is a LOT of heat under the hood. Nothing to worry about, my g37 did it too.

zZSportZz · 03-29-2009, 09:39 PM

Nope, while its running.

Its not very loud. Almost sounds like lifters. Just curious.

RCZ · 03-29-2009, 10:34 PM

injectors?
tick tick tick tick? really fast?

AK370Z · 03-29-2009, 11:01 PM

very normal. You mentioned drive thru so I'm assuming after driving for a while when you stop, it's normal to hear the ticking. Previous Z did it as well.

frost · 03-29-2009, 11:03 PM

Quote:

Originally Posted by AK370Z

very normal. You mentioned drive thru so I'm assuming after driving for a while when you stop, it's normal to hear the ticking. Previous Z did it as well.

Ever figure out what it is?

zZSportZz · 03-29-2009, 11:24 PM

Quote:

Originally Posted by RCZ

injectors?
tick tick tick tick? really fast?

Yep.

AK370Z · 05-15-2009, 03:57 AM

Quote:

Originally Posted by zZSportZz

Being new to Nissan engines...is this normal? I can really hear it going through drive-throughs and stuff. Sorry for the noob question

First car I own that sounds like that.

I don't think it came from the top of the engine(at least not my Z). Mine came from the underside of the car (around cat area-both side). It's a constant ticking noise (exactly the same noise you get when you park your car after driving). You CANNOT hear this noise while driving or even in intersections but when you idle the car in your garage or a quiet area (after driving for at least half an hour), you will notice the sound. Not sure what it is. Doesn't affect the performance of the car in any way. I'll take a video tomorrow.

Quote:

Originally Posted by frost

Ever figure out what it is?

NO.

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.

MC · 03-29-2009, 11:09 PM

throttle body?

Lyndo · 05-21-2009, 12:24 AM

popcorn?

Lyndo · 05-21-2009, 12:54 AM

the only thing i can think of is when you let the engine idle it starts to cool down the converter due to less exaust passing through(obviously lol) and then maybe the components inside and the heat sheild maybe contracting a bit, i don't get how this would make the sound on your video but thats the only explanation i could come up with, i did a search on google and wikipedia and other sites and read some stuff of catalytic converters (i'm kinda bored at the moment) but came up empty handed other than a thread on a cadillac forum of a guy describing the exact same thign as you and they seemed to think it was just the cooling off of the components as well but no one could say for sure so who knows.

edit: wstar beat me to it and said basically the same thing lol

AK370Z · 05-21-2009, 01:13 AM

Quote:

Originally Posted by wstar

Re: after the car is turned off, you're talking about the usual ticking from metal contracting as the car cools off? That video doesn't sound anything like that to me. But metal contracting/expanding and making that characteristic sound is normal even when the engine is running as the temps of the components change.

Quote:

Originally Posted by Lyndo

the only thing i can think of is when you let the engine idle it starts to cool down the converter due to less exaust passing through(obviously lol) and then maybe the components inside and the heat sheild maybe contracting a bit, i don't get how this would make the sound on your video but thats the only explanation i could come up with, i did a search on google and wikipedia and other sites and read some stuff of catalytic converters (i'm kinda bored at the moment) but came up empty handed other than a thread on a cadillac forum of a guy describing the exact same thign as you and they seemed to think it was just the cooling off of the components as well but no one could say for sure so who knows.

edit: wstar beat me to it and said basically the same thing lol

Thank you both. I think it makes sense. It's probably cats cooling down as there's less hot air passing through them. BTW, I just realized this thread is for ticking noise from the engine. Sorry OP if I cluttered this thread up

.

Boostcrazy · 07-09-2009, 02:24 PM

That sounds more like something is rattling or something metalic rubbing against something, not ticking.

03-29-2009, 09:14 PM	#1 (permalink)
zZSportZz A True Z Fanatic Join Date: Mar 2009 Location: Maryland Posts: 1,095 Drives: 370z Blk on Blk 6MT Rep Power: 19	Ticking Sound on top of engine... Being new to Nissan engines...is this normal? I can really hear it going through drive-throughs and stuff. Sorry for the noob question First car I own that sounds like that.

03-29-2009, 09:39 PM	#3 (permalink)
zZSportZz A True Z Fanatic Join Date: Mar 2009 Location: Maryland Posts: 1,095 Drives: 370z Blk on Blk 6MT Rep Power: 19	Nope, while its running. Its not very loud. Almost sounds like lifters. Just curious. Last edited by zZSportZz; 03-29-2009 at 10:33 PM.

03-29-2009, 11:01 PM	#5 (permalink)
AK370Z Administrator Join Date: Sep 2008 Location: NJ Posts: 9,930 Drives: 09 370Z MB Sports M6 Rep Power: 10	very normal. You mentioned drive thru so I'm assuming after driving for a while when you stop, it's normal to hear the ticking. Previous Z did it as well. __________________ 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.

05-15-2009, 08:36 AM	#9 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3595	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	#10 (permalink)
SiXK Enthusiast Member Join Date: Jan 2009 Location: Orlando Posts: 352 Drives: 09 370Z / 91 300ZXTT Rep Power: 186	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

03-29-2009, 09:36 PM	#2 (permalink)
Musashi Enthusiast Member Join Date: Mar 2009 Location: New Jersey Posts: 357 Drives: 09 370Z 6speed Rep Power: 607	You mean after you turn the car off you can hear it from the outside and not from the cockpit? It's normal, there is a LOT of heat under the hood. Nothing to worry about, my g37 did it too.

03-29-2009, 10:34 PM	#4 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1119	injectors? tick tick tick tick? really fast?

03-29-2009, 11:09 PM	#11 (permalink)
MC Moderator Join Date: Oct 2008 Location: NC Posts: 3,238 Drives: 2015 GTR NISMO Rep Power: 24	throttle body?

05-21-2009, 12:24 AM	#12 (permalink)
Lyndo Base Member Join Date: May 2009 Location: Saskatoon, Sk, Canada Posts: 53 Drives: honda accord Rep Power: 16	popcorn?

05-21-2009, 12:54 AM	#13 (permalink)
Lyndo Base Member Join Date: May 2009 Location: Saskatoon, Sk, Canada Posts: 53 Drives: honda accord Rep Power: 16	the only thing i can think of is when you let the engine idle it starts to cool down the converter due to less exaust passing through(obviously lol) and then maybe the components inside and the heat sheild maybe contracting a bit, i don't get how this would make the sound on your video but thats the only explanation i could come up with, i did a search on google and wikipedia and other sites and read some stuff of catalytic converters (i'm kinda bored at the moment) but came up empty handed other than a thread on a cadillac forum of a guy describing the exact same thign as you and they seemed to think it was just the cooling off of the components as well but no one could say for sure so who knows. edit: wstar beat me to it and said basically the same thing lol Last edited by Lyndo; 05-21-2009 at 12:59 AM.

07-09-2009, 02:24 PM	#15 (permalink)
Boostcrazy Base Member Join Date: Jun 2009 Location: Sanford, FL Posts: 45 Drives: '13 PW 370Z Sports Rep Power: 16	That sounds more like something is rattling or something metalic rubbing against something, not ticking.

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