Cold Start up question

rockinnewZ! · 09-17-2012, 03:37 PM

We've got a '10 370, and while I dont think its a problem, I've noticed the sound on the initial startup sounds almost like valving in the exhaust for the first 30 seconds after startup. A uniquely different sound than when its warm...? Figured someone on here would prolly know what that is.

bdavis89 · 09-17-2012, 04:22 PM

Not sure what "valving" is (pardon my ignorance), but our cars tend to have a rough cold startup. The engine and exhaust sound plain bad initially. I believe it has to do with oil needing to recirculate through the engine. I just wait til my RPMs get just under 1k before I drive.

anthonyy · 09-17-2012, 04:23 PM

Normal. Goes away after about 30 secs of idling.

TypeOne · 09-17-2012, 04:39 PM

hmmmmmmm

Cyberium · 09-17-2012, 07:04 PM

I hate my neighbors.

But I still feel bad starting the Z on a cold morning with my fast intentions exhaust.

God damn it's loud

Chan Chee Hoe · 09-17-2012, 07:27 PM

Quote:

Originally Posted by Cyberium

I hate my neighbors.

But I still feel bad starting the Z on a cold morning with my fast intentions exhaust.

God damn it's loud

Agreed,esp early in the morning.!

LakeShow · 09-17-2012, 08:54 PM

Quote:

Originally Posted by Cyberium

I hate my neighbors.

But I still feel bad starting the Z on a cold morning with my fast intentions exhaust.

God damn it's loud

You got the 18" Res?

AlanManouk · 09-17-2012, 09:07 PM

Let it cool down, I usually wait till at least the temperature bar goes up too two lights, unless im late for school haha

Cmike2780 · 09-17-2012, 09:13 PM

I think what you're hearing is the engine before the oil gets warmed up and circulated. It's normal.

Zoren 370 · 09-17-2012, 09:14 PM

Quote:

Originally Posted by Cyberium

I hate my neighbors.

But I still feel bad starting the Z on a cold morning with my fast intentions exhaust.

God damn it's loud

Isn't that great they don't need a rooster or alarm clock to wake them up!!!
I love it loud.

BTW to OP that is Normal my other car does that too but not as loud as the Z.

6MT · 09-17-2012, 09:18 PM

Quote:

Originally Posted by rockinnewZ!

We've got a '10 370, and while I dont think its a problem, I've noticed the sound on the initial startup sounds almost like valving in the exhaust for the first 30 seconds after startup. A uniquely different sound than when its warm...? Figured someone on here would prolly know what that is.

Yep... cold pipes. Normal.

Hotrodz · 09-18-2012, 09:50 AM

Yep, my Nismo does the same thing on a cold start, but it goes away after warm up.

If you live in my hood you are just SOL...my other ride is diesel with a strait pipe and 6 in tips. My next door neighbor has diesel dually with strait pipes and the neighbor across the street has a v8 Nissan PU with an after market exhaust. So the addition of my Nismo and short-tails have brought smiles from my neighbors.

As they say in real-a-state...location, location, location.

DIGItonium · 09-18-2012, 10:22 AM

Quote:

Originally Posted by Cyberium

I hate my neighbors.

But I still feel bad starting the Z on a cold morning with my fast intentions exhaust.

God damn it's loud

Yes, starting the Z with the F.I. exhaust and HFC is like waking up an angry bear in the morning. It rattles the garage doors and even the office window. Get turbos. It'll reduce the dB just a bit.

Speaking of which, I saw a YouTube video posted by a G37 owner a long time ago, now I'm hearing it as well. Do you guys hear and initial metallic clank or rattle of some sort on initial start? Almost like wigging the stick in neutral to produce the rattle.

LukasC · 09-18-2012, 10:50 AM

Quote:

Originally Posted by DIGItonium

Yes, starting the Z with the F.I. exhaust and HFC is like waking up an angry bear in the morning. It rattles the garage doors and even the office window. Get turbos. It'll reduce the dB just a bit.

Speaking of which, I saw a YouTube video posted by a G37 owner a long time ago, now I'm hearing it as well. Do you guys hear and initial metallic clank or rattle of some sort on initial start? Almost like wigging the stick in neutral to produce the rattle.

Yeah the rattling u hear is normal it has to do with our clutches i think. Wouldnt worry about it. Remember u bought a sports car if u want quite no squeeking or rattling theres always the prius lol

09-17-2012, 03:37 PM	#1 (permalink)
rockinnewZ! Base Member Join Date: Jun 2012 Location: New Hampshire Posts: 12 Drives: 2010 370Z, Silver Rep Power: 13	Cold Start up question We've got a '10 370, and while I dont think its a problem, I've noticed the sound on the initial startup sounds almost like valving in the exhaust for the first 30 seconds after startup. A uniquely different sound than when its warm...? Figured someone on here would prolly know what that is.

09-17-2012, 04:22 PM	#2 (permalink)
bdavis89 Track Member Join Date: Oct 2011 Location: Jacksonville FL Posts: 586 Drives: '10 370Z PW Auto Rep Power: 15	Not sure what "valving" is (pardon my ignorance), but our cars tend to have a rough cold startup. The engine and exhaust sound plain bad initially. I believe it has to do with oil needing to recirculate through the engine. I just wait til my RPMs get just under 1k before I drive. __________________ 2010 Pearl White Touring Sport Package \| Navigation \| 7 Speed Automatic

09-17-2012, 07:04 PM	#5 (permalink)
Cyberium Enthusiast Member Join Date: Mar 2009 Location: Vermont Posts: 379 Drives: 370z Touring \| Sport Rep Power: 16	I hate my neighbors. But I still feel bad starting the Z on a cold morning with my fast intentions exhaust. God damn it's loud __________________ Stillen G3 Intakes \| F. I TDX

09-17-2012, 09:13 PM	#9 (permalink)
Cmike2780 A True Z Fanatic Join Date: Jun 2010 Location: Long Island Posts: 5,059 Drives: slowwww Rep Power: 29	I think what you're hearing is the engine before the oil gets warmed up and circulated. It's normal. __________________ [09][MB][6-Spd MT][Touring][Stillen Gen III][K&N][Borla CBE][Evo-R] [ArchitTEK Photography]

09-18-2012, 09:50 AM	#12 (permalink)
Hotrodz A True Z Fanatic Join Date: Aug 2012 Location: NW, AZ Posts: 9,330 Drives: 10 Nissan 370z Nismo Rep Power: 2684385	Yep, my Nismo does the same thing on a cold start, but it goes away after warm up. If you live in my hood you are just SOL...my other ride is diesel with a strait pipe and 6 in tips. My next door neighbor has diesel dually with strait pipes and the neighbor across the street has a v8 Nissan PU with an after market exhaust. So the addition of my Nismo and short-tails have brought smiles from my neighbors. As they say in real-a-state...location, location, location. __________________ *Fast Intentions TT Installed and Tuned by Seb at SpecialtyZ 610whp 560tq:\|Fast Intentions 3" TT-TDX*\|SpecialtyZ/Fast Intentions 72 Row Oil Cooler\|SZ 6 Puck Clutch & Flywheel\|3GsCustoms\|Z1\|Wavetrac\|Hotchkis\|Whiteline \|Blitz\|Fortune Auto 500\|Fujimura\|SPL\|H&R\|TK\|TWM\|RPM Rollbar\|Sparco\|Next Level Performance\|TrackSpec\|AeroFlow Dynamics\|Pioneer\|

09-17-2012, 04:23 PM	#3 (permalink)
anthonyy A True Z Fanatic Join Date: Apr 2011 Location: Los Gatos, CA Posts: 1,027 Drives: Lexus CT Rep Power: 16	Normal. Goes away after about 30 secs of idling.

09-17-2012, 04:39 PM	#4 (permalink)
TypeOne A True Z Fanatic Join Date: Jul 2010 Location: Baton Rouge, LA Posts: 2,682 Drives: BSM 370 Rep Power: 1851	hmmmmmmm

09-17-2012, 09:07 PM	#8 (permalink)
AlanManouk Base Member Join Date: Aug 2011 Location: SoCal Posts: 120 Drives: Pearl White 370z 6mt Rep Power: 14	Let it cool down, I usually wait till at least the temperature bar goes up too two lights, unless im late for school haha

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