WHAT is this noise!?! sr20det - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

s4cxnick · 07-11-2012, 05:27 PM

so, ive got a video of this noise, after my car hits a certain rpms.. it just started happening yesterday and i dont have a clue on what it could be.. any help or if anyones had a similar problem, any advice would be appreciated. thanks guys

http://s209.photobucket.com/albums/b...t=IMG_6797.mp4

i dont know how to upload straight to here.. :S

godsmack · 07-11-2012, 05:42 PM

not sure exactly what it is but sure doesn't sound good. i wouldn't do that too often until you find the source of that noise. i would pull the valve cover and look at your head and check all the rocker arms.

Sileighty_85 · 07-11-2012, 05:45 PM

lol sounds like a spun rod bearing

s4cxnick · 07-11-2012, 05:47 PM

yeah, i took the valve cover off and looked, the only source of something going wrong is two rocker arms/cam lobes that appear to look scorched cuz of being so hot? do you think that would make the noise?.. but what would cause just two of the rockers to be like that?

s4cxnick · 07-11-2012, 05:48 PM

ive also been told it was a spun bearing.. but i guess im just wondering if anyone else has had the same noise in their cars..

Sileighty_85 · 07-11-2012, 05:49 PM

scoring is probably from lack of oil from a bad oil pump

s4cxnick · 07-11-2012, 05:55 PM

yeah that makes sense.. hopefully someone else has had this, so i can get some more insight, then its time to start tearing it down i suppose.

Sileighty_85 · 07-11-2012, 06:03 PM

youtube spun rod bearings for Sr's and see if it matches your sound.

Usually with SRB they are barely audioable at idle, when reved knocking get louder and faster in the higher RPMs

s4cxnick · 07-11-2012, 06:14 PM

i've youtubed a few videos of spun bearings already, i think there was maybe one car that sounded close to mine.. but even that car had a noticeable ''knocking'' which i dont think my car has.. unless i just got really lucky and im catching it before it even really starts to knock?

Prozac · 07-11-2012, 06:52 PM

Sounds likes it not running on all 4 cylinders , more like 3 or something , video wasnt the greatest , like android shit or something J.king.

Edit: Is it stock, upgrades , ran fine before what? , just put it in?
Also create a youtube.com acount and upload then paste a link here to possibly get some better
vids.

s4cxnick · 07-11-2012, 07:16 PM

the motor is stock, i just finished the swap maybe a few weeks ago, been working on getting the finishing bugs out of it.. and putting it all back together, ive literally drove the car for maybe a few hours at max of driving.. and it started making this sound one day when i was checking over the car before leaving work.. it ran fine for a day or two before i caught this. it does need some tune up things, which i was getting to this week before this noise appeared. its my shitty iphone quality

http://youtu.be/sEnG-fRhQOU

kushlivin · 07-11-2012, 07:31 PM

That def doesn't sound good lol, might be time for a rebuild

s4cxnick · 07-11-2012, 07:34 PM

right? last thing i wanna do is pull it back out and rebuild it, i just got it in and running..

Prozac · 07-11-2012, 08:13 PM

Man this could be as simple as spark plugs , dont know cause of history to pin point one thing, also if you havent already pull some codes to start the process of elimination.
Second , I would do a compression test (which you might have done before you ran it ) and see what you get now. And in the process throw some new spark plugs in it if you havent already.

Edit: Im packing Iphone 3gs and you will get alot better quality with youtube.
Is a video of the storm / rusthole / ecu enema , that took out my ecu.
Ky storms - YouTube

OutToWinPAHC · 07-11-2012, 08:15 PM

Use a wooden dowel aka a stick and put it on the motor in different spots and listen at the other end right against your ear. You will be able to pin point top end bottom end and cylinder area with ease.

Prozac · 07-11-2012, 08:24 PM

Yeah after watching you youtube video , the ticking is just the injectors , the other sound could be a waterpump bearing going out , still working but on the verge of taking a shit, Also what have you done to the engine besides dropping it in?

Edit: A Stethoscope is fairly cheap and very uselfull , or wood dowel / Screwdriver metal end to engine plastic to ear to pin-point what area the sound is.

s4cxnick · 07-12-2012, 10:04 AM

i havent done anything to the motor, besides the drop in, its bone stock.. only upgrades are 3" dp, walbro 255, and 3'' exhaust.. motorwise its stock.. but the waterpump is brand new, has maybe 10 miles on it, so i doubt that would be the issue? and i have tried the screwdriver/dowel trick, but i still cant pin point exactly where its coming from.. :S

oh and im going to get some new plugs, asap. but the compression read good numbers across the board, i did one of those the first day i got it up and firing. appreciate all the help guys.

07-11-2012, 05:27 PM	#1
s4cxnick Zilvia Member Join Date: Jan 2012 Location: Minnesota Age: 31 Posts: 156 Trader Rating: (0) Feedback Score: 0 reviews	WHAT is this noise!?! sr20det so, ive got a video of this noise, after my car hits a certain rpms.. it just started happening yesterday and i dont have a clue on what it could be.. any help or if anyones had a similar problem, any advice would be appreciated. thanks guys http://s209.photobucket.com/albums/b...t=IMG_6797.mp4 i dont know how to upload straight to here.. :S

07-11-2012, 05:45 PM	#3
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	lol sounds like a spun rod bearing __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

07-11-2012, 05:49 PM	#6
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	scoring is probably from lack of oil from a bad oil pump __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

07-11-2012, 06:03 PM	#8
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	youtube spun rod bearings for Sr's and see if it matches your sound. Usually with SRB they are barely audioable at idle, when reved knocking get louder and faster in the higher RPMs __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

07-11-2012, 05:42 PM	#2
godsmack Zilvia Addict Join Date: Feb 2009 Location: Allentown, PA Age: 39 Posts: 652 Trader Rating: (0) Feedback Score: 0 reviews	not sure exactly what it is but sure doesn't sound good. i wouldn't do that too often until you find the source of that noise. i would pull the valve cover and look at your head and check all the rocker arms.

07-11-2012, 05:47 PM	#4
s4cxnick Zilvia Member Join Date: Jan 2012 Location: Minnesota Age: 31 Posts: 156 Trader Rating: (0) Feedback Score: 0 reviews	yeah, i took the valve cover off and looked, the only source of something going wrong is two rocker arms/cam lobes that appear to look scorched cuz of being so hot? do you think that would make the noise?.. but what would cause just two of the rockers to be like that?

07-11-2012, 05:48 PM	#5
s4cxnick Zilvia Member Join Date: Jan 2012 Location: Minnesota Age: 31 Posts: 156 Trader Rating: (0) Feedback Score: 0 reviews	ive also been told it was a spun bearing.. but i guess im just wondering if anyone else has had the same noise in their cars..

07-11-2012, 05:55 PM	#7
s4cxnick Zilvia Member Join Date: Jan 2012 Location: Minnesota Age: 31 Posts: 156 Trader Rating: (0) Feedback Score: 0 reviews	yeah that makes sense.. hopefully someone else has had this, so i can get some more insight, then its time to start tearing it down i suppose.

07-11-2012, 06:14 PM	#9
s4cxnick Zilvia Member Join Date: Jan 2012 Location: Minnesota Age: 31 Posts: 156 Trader Rating: (0) Feedback Score: 0 reviews	i've youtubed a few videos of spun bearings already, i think there was maybe one car that sounded close to mine.. but even that car had a noticeable ''knocking'' which i dont think my car has.. unless i just got really lucky and im catching it before it even really starts to knock?

07-11-2012, 06:52 PM	#10
Prozac Leaky Injector Join Date: Aug 2011 Location: Ky Age: 44 Posts: 89 Trader Rating: (3) Feedback Score: 3 reviews	Sounds likes it not running on all 4 cylinders , more like 3 or something , video wasnt the greatest , like android shit or something J.king. Edit: Is it stock, upgrades , ran fine before what? , just put it in? Also create a youtube.com acount and upload then paste a link here to possibly get some better vids.

07-11-2012, 07:16 PM	#11
s4cxnick Zilvia Member Join Date: Jan 2012 Location: Minnesota Age: 31 Posts: 156 Trader Rating: (0) Feedback Score: 0 reviews	the motor is stock, i just finished the swap maybe a few weeks ago, been working on getting the finishing bugs out of it.. and putting it all back together, ive literally drove the car for maybe a few hours at max of driving.. and it started making this sound one day when i was checking over the car before leaving work.. it ran fine for a day or two before i caught this. it does need some tune up things, which i was getting to this week before this noise appeared. its my shitty iphone quality http://youtu.be/sEnG-fRhQOU

07-11-2012, 07:34 PM	#13
s4cxnick Zilvia Member Join Date: Jan 2012 Location: Minnesota Age: 31 Posts: 156 Trader Rating: (0) Feedback Score: 0 reviews	right? last thing i wanna do is pull it back out and rebuild it, i just got it in and running..

07-11-2012, 08:13 PM	#14
Prozac Leaky Injector Join Date: Aug 2011 Location: Ky Age: 44 Posts: 89 Trader Rating: (3) Feedback Score: 3 reviews	Man this could be as simple as spark plugs , dont know cause of history to pin point one thing, also if you havent already pull some codes to start the process of elimination. Second , I would do a compression test (which you might have done before you ran it ) and see what you get now. And in the process throw some new spark plugs in it if you havent already. Edit: Im packing Iphone 3gs and you will get alot better quality with youtube. Is a video of the storm / rusthole / ecu enema , that took out my ecu. Ky storms - YouTube

07-11-2012, 08:15 PM	#15
OutToWinPAHC Zilvia Addict Join Date: May 2007 Location: Florida Posts: 746 Trader Rating: (6) Feedback Score: 6 reviews	Use a wooden dowel aka a stick and put it on the motor in different spots and listen at the other end right against your ear. You will be able to pin point top end bottom end and cylinder area with ease.

07-11-2012, 08:24 PM	#16
Prozac Leaky Injector Join Date: Aug 2011 Location: Ky Age: 44 Posts: 89 Trader Rating: (3) Feedback Score: 3 reviews	Yeah after watching you youtube video , the ticking is just the injectors , the other sound could be a waterpump bearing going out , still working but on the verge of taking a shit, Also what have you done to the engine besides dropping it in? Edit: A Stethoscope is fairly cheap and very uselfull , or wood dowel / Screwdriver metal end to engine plastic to ear to pin-point what area the sound is.

07-12-2012, 10:04 AM	#17
s4cxnick Zilvia Member Join Date: Jan 2012 Location: Minnesota Age: 31 Posts: 156 Trader Rating: (0) Feedback Score: 0 reviews	i havent done anything to the motor, besides the drop in, its bone stock.. only upgrades are 3" dp, walbro 255, and 3'' exhaust.. motorwise its stock.. but the waterpump is brand new, has maybe 10 miles on it, so i doubt that would be the issue? and i have tried the screwdriver/dowel trick, but i still cant pin point exactly where its coming from.. :S oh and im going to get some new plugs, asap. but the compression read good numbers across the board, i did one of those the first day i got it up and firing. appreciate all the help guys.