sr20det whinning sound, like supercharger. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

doubledashdrifting · 10-27-2008, 11:37 AM

I have this very high pitched whinning sound from the front of my engine. It happens no matter if the car is cold or warmed up, gets louder when rpm increases. I thought it was my tranny low on fluid so I checked and it was low, filled it up and still have whinning sound. Opened my hood and noticed the sound is the loudest from the front of the engine area, either the crank pully or alternator, heck or water pump. Not sure what would cause this sound, like the title says, it sounds like a high pitched supercharger whine. Can this be the Alternator going bad, water pump, or something worse? Any info would help.

Addicted2Kouki · 10-27-2008, 11:41 AM

belts.

could also be ps pump going out.

doubledashdrifting · 10-27-2008, 04:18 PM

the sound does not get worse when I turn the wheel, it only gets louder if I bring the rpm's up. is there any way to quickly check if its the water pump or the alternator or if its something else.

doubledashdrifting · 10-27-2008, 09:52 PM

Ok so its not my steering pump. The sound is louder by the crank pully, my front main seal is leaking could that cause the bearing in the pully to make this whining sound? It getting worse and louder, need to find the cause asap. Any suggestions?

blu808 · 10-27-2008, 09:54 PM

Oil pump died. Stop driving asap

Sileighty_85 · 10-27-2008, 10:20 PM

Remove all your belt and crank it if sounds persist look deeper

doubledashdrifting · 10-28-2008, 12:07 AM

Quote:

Originally Posted by blu808

Oil pump died. Stop driving asap

hey blu808, any way to 100% find out if it is the oil pump, I'd hate to buy a pump and do all that work for the sound to be there again.

doubledashdrifting · 10-28-2008, 12:08 AM

Quote:

Originally Posted by Sileighty_85

Remove all your belt and crank it if sounds persist look deeper

I will try that tomorrow. I hope its something simple.

doubledashdrifting · 10-28-2008, 02:48 PM

Ok I ended up taking the car to a guy on the Nico forums that works on 240's. He noticed that my front main seal is leaking bad and said most likely the cause for this sound is the front main seal. He is gonna replace it on Thursday or Friday, hopefully this fixes the problem, but need to do it anyway so bonus if it does fix the sound.

surge s14 · 10-28-2008, 03:09 PM

do you run a fan clutch?

it happend to me on my old ka

all i did was get e-fans and done

doubledashdrifting · 10-28-2008, 03:20 PM

no I am running duel electric fans, but I know that the crank pully looks pretty damn old and my front main seal is REALLY bad.

Om1kron · 10-28-2008, 03:37 PM

Quote:

Originally Posted by blu808

Oil pump died. Stop driving asap

heh he would've been in trouble a looooong time ago if this were the case.

doubledashdrifting · 10-28-2008, 03:54 PM

Quote:

Originally Posted by Om1kron

heh he would've been in trouble a looooong time ago if this were the case.

Yeah, I'm also getting oil up to the cams so doubt its the pump...ok, hope its not the pump but yeah I've had this sound for a while now and my engine would have died long ago if that was the case.

jspeedm · 10-28-2008, 07:27 PM

most likely cause is the alternator.

doubledashdrifting · 10-29-2008, 12:05 PM

I've done the poor mans stethoscope, long screwdriver, on the alternator and I'm not hearing the noise.

jspeedm · 10-29-2008, 05:58 PM

that will only tell you if the bearing or pulley is bad. if it is the windings inside the alternator, the screwdriver wont tell you. if you have a friend with the same car, borrow his, swap them, and the noise should be gone.

doubledashdrifting · 10-30-2008, 10:55 AM

LOL, I actually already purchased a used sr20 alternator, I'll get it tested and if that one is good I will probably just install it. Thanks for the info Jspeedm.

10-27-2008, 11:37 AM	#1
doubledashdrifting Join Date: Jul 2007 Location: Rancho Santa Margarita CA Age: 41 Posts: 37 Trader Rating: (1) Feedback Score: 1 reviews	sr20det whinning sound, like supercharger. I have this very high pitched whinning sound from the front of my engine. It happens no matter if the car is cold or warmed up, gets louder when rpm increases. I thought it was my tranny low on fluid so I checked and it was low, filled it up and still have whinning sound. Opened my hood and noticed the sound is the loudest from the front of the engine area, either the crank pully or alternator, heck or water pump. Not sure what would cause this sound, like the title says, it sounds like a high pitched supercharger whine. Can this be the Alternator going bad, water pump, or something worse? Any info would help.

10-27-2008, 09:54 PM	#5
blu808 Post Whore! Join Date: Dec 2002 Location: Campbell, Ca Age: 38 Posts: 5,010 Trader Rating: (3) Feedback Score: 3 reviews	Oil pump died. Stop driving asap __________________

10-27-2008, 10:20 PM	#6
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	Remove all your belt and crank it if sounds persist look deeper __________________ 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

10-28-2008, 03:09 PM	#10
surge s14 Zilvia FREAK! Join Date: Dec 2005 Location: Laredo Texas Posts: 1,125 Trader Rating: (12) Feedback Score: 12 reviews	do you run a fan clutch? it happend to me on my old ka all i did was get e-fans and done __________________

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

10-27-2008, 04:18 PM	#3
doubledashdrifting Join Date: Jul 2007 Location: Rancho Santa Margarita CA Age: 41 Posts: 37 Trader Rating: (1) Feedback Score: 1 reviews	the sound does not get worse when I turn the wheel, it only gets louder if I bring the rpm's up. is there any way to quickly check if its the water pump or the alternator or if its something else.

10-27-2008, 09:52 PM	#4
doubledashdrifting Join Date: Jul 2007 Location: Rancho Santa Margarita CA Age: 41 Posts: 37 Trader Rating: (1) Feedback Score: 1 reviews	Ok so its not my steering pump. The sound is louder by the crank pully, my front main seal is leaking could that cause the bearing in the pully to make this whining sound? It getting worse and louder, need to find the cause asap. Any suggestions?

10-28-2008, 02:48 PM	#9
doubledashdrifting Join Date: Jul 2007 Location: Rancho Santa Margarita CA Age: 41 Posts: 37 Trader Rating: (1) Feedback Score: 1 reviews	Ok I ended up taking the car to a guy on the Nico forums that works on 240's. He noticed that my front main seal is leaking bad and said most likely the cause for this sound is the front main seal. He is gonna replace it on Thursday or Friday, hopefully this fixes the problem, but need to do it anyway so bonus if it does fix the sound.

10-28-2008, 03:20 PM	#11
doubledashdrifting Join Date: Jul 2007 Location: Rancho Santa Margarita CA Age: 41 Posts: 37 Trader Rating: (1) Feedback Score: 1 reviews	no I am running duel electric fans, but I know that the crank pully looks pretty damn old and my front main seal is REALLY bad.

10-28-2008, 07:27 PM	#14
jspeedm Nissanaholic! Join Date: Jul 2008 Location: SoCal 562 Age: 42 Posts: 1,680 Trader Rating: (26) Feedback Score: 26 reviews	most likely cause is the alternator.

10-29-2008, 12:05 PM	#15
doubledashdrifting Join Date: Jul 2007 Location: Rancho Santa Margarita CA Age: 41 Posts: 37 Trader Rating: (1) Feedback Score: 1 reviews	I've done the poor mans stethoscope, long screwdriver, on the alternator and I'm not hearing the noise.

10-29-2008, 05:58 PM	#16
jspeedm Nissanaholic! Join Date: Jul 2008 Location: SoCal 562 Age: 42 Posts: 1,680 Trader Rating: (26) Feedback Score: 26 reviews	that will only tell you if the bearing or pulley is bad. if it is the windings inside the alternator, the screwdriver wont tell you. if you have a friend with the same car, borrow his, swap them, and the noise should be gone.

10-30-2008, 10:55 AM	#17
doubledashdrifting Join Date: Jul 2007 Location: Rancho Santa Margarita CA Age: 41 Posts: 37 Trader Rating: (1) Feedback Score: 1 reviews	LOL, I actually already purchased a used sr20 alternator, I'll get it tested and if that one is good I will probably just install it. Thanks for the info Jspeedm.