is my turbo about to die? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Goldeneye9mm · 10-30-2007, 09:20 PM

i have a s14 sr20det and it's making a weird noise and i'm 80% sure it's coming from the turbo. it chatters under light boost like 2-5psi at lower speeds.it's not in the rods or valves i've checked. it boosts up fine drives fine no extra lag. and under harder driving (full throttle @ 13psi) the noise pretty much goes away. it's my new toy so i've been beating on it but i don't think i was doing any serious damage. i usually let it cool down for a few minutes after hard driving. so what do you think. btw it's my first turbo car so i really don't know.

cotbu · 10-30-2007, 09:52 PM

compressor surge?
Compressor surge: You can think or surge as the point at which the compressor blades begin to “slip” in the air, losing their pumping ability, much like an aircraft wing loses its lift when it stalls. In a turbo, this happens in a series of bursts, as the blades slip, then bite, slip then bite. This sets up a pulsing wave in the turbo piping and explains why the sound has that characteristic “flutter”.
The interesting thing about compressor surge is that it occurs much more readily at low turbo shaft speeds. At these low shaft speeds, on road cars this is generally between 2000 and 3000 RPM, compressor surge is not much of a problem, as the loads generated by the surge are miniscule compared to what the turbo encounters at high boost. However, if surge occurs at high RPM and boost, it is possible to reduce the turbo life and/or damage the compressor
http://www.gofastbits.com/index.php?...tion=tech_info

*Nismoknightska-t* · 10-30-2007, 09:53 PM

any smoke coming from your exhaust?

95gstnj · 10-30-2007, 10:07 PM

if it was your turbo, most likely the noise would be highest when you are in boost, and you'd probably have alot of smoke when you are in boost

driftn_silvia · 10-30-2007, 11:07 PM

if its a whistle in sound you might have a vacuum leak some where... but if its like a scrapping sound everytime you hit boost. you might have shaft play. so ur fins on the turbine are hitting the wall. check your turbo to see if you have shaft play by wiggling the fins.

NiSmOKnIghTsRBS14 · 10-31-2007, 12:24 AM

turbo is way gone time for a UPGRADE

GSXRJJordan · 10-31-2007, 12:33 AM

Doesn't sound like the turbo, because at full throttle/boost the problem should not go away - maybe your exhaust is loud enough you're just not hearing it? Could be some other vibration also.

Checking for shaft play will tell you. Any amount is bad, but if you can actually see the shaft/blades move when you stick your fingers around in there, it's time for a new one.

GabeS14 · 10-31-2007, 01:30 AM

This only happens while you are boosting right??
Not when you take your foot off the gas correct?(surge)

I had the same thing, before, it was the turbo elbow gasket!
make sure there is no blown gaskets around that area, from
turbo/turbo elbow, or from turbo elbow to downpipe!

i had my turb/turbo elbow gasket replaced and the fluttering stopped.
goodluck.

Goldeneye9mm · 10-31-2007, 10:12 AM

the gasket sounds like the most likley culprate. it's not surge. i' gonna go out and check for play in a few. but it alomst sounded like it was coming from under the dash like the area right infront of me. thats why i suspected the turbo. i have a new outlet dump pipe so it shouldn't be that. i'll post again after i check the shaft for play. also you can hear the turbo wind down after you shut the car off. it's not loud at all but you can hear it. is that normal?

JDMwannaBE · 10-31-2007, 10:28 AM

thats perfectly normal for a ball bearing turbo. thats the glory of them, they spin so easily that when you shut the engine down they still spin freely. mine does the same thing, if you go back to the muffler you'll hear it real well....lol.

civilized_drifter · 10-31-2007, 11:12 AM

have you checked for shaft play?

Goldeneye9mm · 10-31-2007, 11:27 AM

just checked "my shaft" from the intake side. it feels like ther is more play on the exhaust side. it moves in like a pendalum motion from the nut. like the intake side is tight but the exhaust side moves. ether way there is some play. how hard are they to rebuild? and or who does it? and where could i get the parts to do so? or do any of you have a spair i could buy? lemme know.

unicoladron · 10-31-2007, 12:37 PM

Quote:

Originally Posted by Goldeneye9mm

just checked "my shaft" from the intake side. it feels like ther is more play on the exhaust side. it moves in like a pendalum motion from the nut. like the intake side is tight but the exhaust side moves. ether way there is some play. how hard are they to rebuild? and or who does it? and where could i get the parts to do so? or do any of you have a spair i could buy? lemme know.

there are t25 rebuild kits available in alot ofplaces DSMs had the same t25. you can search for "garrett t25 rebuild kit" or anything like that and i know for a fact egay has them. if you can use basic tools and read a blow-up diagram, you can rebuild it yourself.

GabeS14 · 10-31-2007, 12:51 PM

or you could take it to a professional shop to get a PRO opinion, before you spend hundres of dolars.
a gasket could only cost you $30 bucks, if it was that instead!

JDMwannaBE · 10-31-2007, 11:56 AM

you'd be better off to replace it. by the time you spend the cash to rebuild you'd spend about the same. but i wouldnt run high boost on it until you can fix it.

mayco_86 · 10-31-2007, 12:08 PM

I would just upgrade before that compressor wheel fly's off.

ichibans13.5 · 10-31-2007, 01:08 PM

if it sounds like a dentist drill the turbo is going - shaft play as said prior is also an easy way to tell - but that said garrett turbos last at least 80k - so if its the problem either replace it or drive it till u pour out white smoke out of your exhaust

Goldeneye9mm · 10-31-2007, 02:30 PM

well i can't afford a new one and it's a t28 on a s14 motor. would the t25 kit still work? like i said i'm a newb to the turbo world so over inform me if possible.

civilized_drifter · 10-31-2007, 02:56 PM

if you want to rebuild it there is a place in nashville that rebuilds turbos called turbo auto. they do great work.
(615) 383-6242

Goldeneye9mm · 10-31-2007, 07:21 PM

http://cgi.ebay.com/ebaymotors/GT28R...spagenameZWDVW
what do you think. i know it's a cheapy but i'm broke. please give honest opinions.

driftn_silvia · 10-31-2007, 07:26 PM

heck no...lol. imo i wouldnt buy generic product. i dont trust them. there couple of t28 around in the forum for sale for about the same price. check the F/S section.

trogdor · 10-31-2007, 07:35 PM

i have the same symptoms but at higher rpms too. im pretty sure it's my turbo inlet gasket because i can see that it's blown

speed_racerx · 10-31-2007, 07:52 PM

so... high pitch whistle like sound is bad? fu$#in A....

Goldeneye9mm · 10-31-2007, 07:56 PM

well i just had the gaskets replaced. and it's a chatter not a whistle. and i definatly have shaft play.

Goldeneye9mm · 11-01-2007, 12:35 PM

ok well all the kits i looked at don't include the dual ball bearings. or am i reading them wrong. like this one

http://cgi.ebay.com/ebaymotors/COMPL...spagenameZWDVW

any more infor would help. i am a mechanic so i assume i could handle this. i just wanna make sure i do it right.

Goldeneye9mm · 12-18-2007, 04:15 PM

ok i'm re-opening this thread cause it's still making the noise and it's getting louder. ok it only happens when the car in FULLY warmed up and it sounds like sticking a pen in a plastic box fan only it changes consistant w/ the engine rpms. it WILL NOT make the noise sitting still. hence the fustration cause i cant reproduce it w/ the hood open in my garage or driveway. someone has had to had this problem before. i'm not asking for any miracles i just need to know what i should take apart first. any input is welcome. thanks

*S13Boosts* · 12-18-2007, 06:59 PM

Quote:

Originally Posted by Goldeneye9mm

ok well all the kits i looked at don't include the dual ball bearings. or am i reading them wrong. like this one

http://cgi.ebay.com/ebaymotors/COMPL...spagenameZWDVW

any more infor would help. i am a mechanic so i assume i could handle this. i just wanna make sure i do it right.

first of all stop hyperlinking ebay links!

& 2nd you can get a sr turbo way cheaper!!

Goldeneye9mm · 12-18-2007, 08:08 PM

well i have an s14 sr20 in an s14 so i need a ballbearing turbo. i don't want to down grade to a t25 or a wet bearing t28. but anyway, if you know where to get a t28 bb turbo cheaper than that please sen a lind or some info. thats the cheapest one i'vebeen able to find. thanks

serturbo · 12-18-2007, 04:31 PM

What have you done to remedy the problem so far? Change turbo?

Goldeneye9mm · 12-18-2007, 05:31 PM

well i've checked the shaft for play and it has some but not a huge amount i noticed the other day the my test pipe gasket was leaking but thats not where i'm hearing the sound. i would love to replace the turbo but i'm so strapped right now i can hardly afford to keep food on the table. any gasket or parts donations are greatly appreciated

10-30-2007, 09:20 PM	#1
Goldeneye9mm Zilvia Member Join Date: Oct 2007 Location: Baltimore, Maryland Age: 39 Posts: 173 Trader Rating: (2) Feedback Score: 2 reviews	is my turbo about to die? i have a s14 sr20det and it's making a weird noise and i'm 80% sure it's coming from the turbo. it chatters under light boost like 2-5psi at lower speeds.it's not in the rods or valves i've checked. it boosts up fine drives fine no extra lag. and under harder driving (full throttle @ 13psi) the noise pretty much goes away. it's my new toy so i've been beating on it but i don't think i was doing any serious damage. i usually let it cool down for a few minutes after hard driving. so what do you think. btw it's my first turbo car so i really don't know.

10-30-2007, 09:52 PM	#2
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 50 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	compressor surge? Compressor surge: You can think or surge as the point at which the compressor blades begin to “slip” in the air, losing their pumping ability, much like an aircraft wing loses its lift when it stalls. In a turbo, this happens in a series of bursts, as the blades slip, then bite, slip then bite. This sets up a pulsing wave in the turbo piping and explains why the sound has that characteristic “flutter”. The interesting thing about compressor surge is that it occurs much more readily at low turbo shaft speeds. At these low shaft speeds, on road cars this is generally between 2000 and 3000 RPM, compressor surge is not much of a problem, as the loads generated by the surge are miniscule compared to what the turbo encounters at high boost. However, if surge occurs at high RPM and boost, it is possible to reduce the turbo life and/or damage the compressor http://www.gofastbits.com/index.php?...tion=tech_info __________________ LoverTechnologies "Half Broken Things!"

10-30-2007, 09:53 PM	#3
Nismoknightska-t Premium Member Join Date: May 2007 Location: Azusa, socal baby! why do i live this way?? it must be the money! Age: 39 Posts: 523 Trader Rating: (3) Feedback Score: 3 reviews	any smoke coming from your exhaust? __________________ NismoKnights Terrorizing Honda crews since 2003 ls2 powered kouki..all show and GO! putting it down on the streets and the track! LMAO V8 Nismokights on http://www.youtube.com/user/NismoKnights

10-31-2007, 12:33 AM	#7
GSXRJJordan Post Whore! Join Date: May 2006 Location: San Diego, CA Posts: 9,135 Trader Rating: (19) Rides Gallery: GSXRJJordan Feedback Score: 19 reviews	Doesn't sound like the turbo, because at full throttle/boost the problem should not go away - maybe your exhaust is loud enough you're just not hearing it? Could be some other vibration also. Checking for shaft play will tell you. Any amount is bad, but if you can actually see the shaft/blades move when you stick your fingers around in there, it's time for a new one. __________________ Jordan Innovations has a new web site! www.JordanInnovations.com -- All your favorite FD Pro Drifters love it, trust me -- www.JordanInnovations.com

10-31-2007, 01:30 AM	#8
GabeS14 Post Whore! Join Date: Dec 2005 Location: Sin City Las Vegas Posts: 4,521 Trader Rating: (27) Rides Gallery: GabeS14 Feedback Score: 27 reviews	This only happens while you are boosting right?? Not when you take your foot off the gas correct?(surge) I had the same thing, before, it was the turbo elbow gasket! make sure there is no blown gaskets around that area, from turbo/turbo elbow, or from turbo elbow to downpipe! i had my turb/turbo elbow gasket replaced and the fluttering stopped. goodluck. __________________ E92 M3 19" wheels for sale///JWT Cams and Springs +30whp for sale... cheap.

10-30-2007, 10:07 PM	#4
95gstnj Leaky Injector Join Date: Feb 2007 Location: NJ Posts: 91 Trader Rating: (0) Feedback Score: 0 reviews	if it was your turbo, most likely the noise would be highest when you are in boost, and you'd probably have alot of smoke when you are in boost

10-30-2007, 11:07 PM	#5
driftn_silvia Zilvia Junkie Join Date: Jul 2005 Location: ventura Posts: 560 Trader Rating: (7) Feedback Score: 7 reviews	if its a whistle in sound you might have a vacuum leak some where... but if its like a scrapping sound everytime you hit boost. you might have shaft play. so ur fins on the turbine are hitting the wall. check your turbo to see if you have shaft play by wiggling the fins.

10-31-2007, 12:24 AM	#6
NiSmOKnIghTsRBS14 Zilvia Junkie Join Date: Jun 2007 Location: SoCal Posts: 426 Trader Rating: (4) Feedback Score: 4 reviews	turbo is way gone time for a UPGRADE

10-31-2007, 10:12 AM	#9
Goldeneye9mm Zilvia Member Join Date: Oct 2007 Location: Baltimore, Maryland Age: 39 Posts: 173 Trader Rating: (2) Feedback Score: 2 reviews	the gasket sounds like the most likley culprate. it's not surge. i' gonna go out and check for play in a few. but it alomst sounded like it was coming from under the dash like the area right infront of me. thats why i suspected the turbo. i have a new outlet dump pipe so it shouldn't be that. i'll post again after i check the shaft for play. also you can hear the turbo wind down after you shut the car off. it's not loud at all but you can hear it. is that normal?

10-31-2007, 10:28 AM	#10
JDMwannaBE Zilvia Junkie Join Date: Jan 2007 Location: kentucky Age: 40 Posts: 330 Trader Rating: (0) Feedback Score: 0 reviews	thats perfectly normal for a ball bearing turbo. thats the glory of them, they spin so easily that when you shut the engine down they still spin freely. mine does the same thing, if you go back to the muffler you'll hear it real well....lol. __________________

10-31-2007, 11:12 AM	#11
civilized_drifter Zilvia Junkie Join Date: Oct 2006 Location: spring hill, TN Age: 36 Posts: 584 Trader Rating: (0) Feedback Score: 0 reviews	have you checked for shaft play? __________________

10-31-2007, 11:27 AM	#12
Goldeneye9mm Zilvia Member Join Date: Oct 2007 Location: Baltimore, Maryland Age: 39 Posts: 173 Trader Rating: (2) Feedback Score: 2 reviews	just checked "my shaft" from the intake side. it feels like ther is more play on the exhaust side. it moves in like a pendalum motion from the nut. like the intake side is tight but the exhaust side moves. ether way there is some play. how hard are they to rebuild? and or who does it? and where could i get the parts to do so? or do any of you have a spair i could buy? lemme know.

10-31-2007, 12:51 PM	#14
GabeS14 Post Whore! Join Date: Dec 2005 Location: Sin City Las Vegas Posts: 4,521 Trader Rating: (27) Rides Gallery: GabeS14 Feedback Score: 27 reviews	or you could take it to a professional shop to get a PRO opinion, before you spend hundres of dolars. a gasket could only cost you $30 bucks, if it was that instead! __________________ E92 M3 19" wheels for sale///JWT Cams and Springs +30whp for sale... cheap.

10-31-2007, 11:56 AM	#15
JDMwannaBE Zilvia Junkie Join Date: Jan 2007 Location: kentucky Age: 40 Posts: 330 Trader Rating: (0) Feedback Score: 0 reviews	you'd be better off to replace it. by the time you spend the cash to rebuild you'd spend about the same. but i wouldnt run high boost on it until you can fix it. __________________

10-31-2007, 12:08 PM	#16
mayco_86 Zilvia Addict Join Date: Mar 2006 Location: Cali Posts: 988 Trader Rating: (9) Feedback Score: 9 reviews	I would just upgrade before that compressor wheel fly's off.

10-31-2007, 01:08 PM	#17
ichibans13.5 Leaky Injector Join Date: Aug 2007 Location: MA Posts: 130 Trader Rating: (4) Feedback Score: 4 reviews	if it sounds like a dentist drill the turbo is going - shaft play as said prior is also an easy way to tell - but that said garrett turbos last at least 80k - so if its the problem either replace it or drive it till u pour out white smoke out of your exhaust

10-31-2007, 02:30 PM	#18
Goldeneye9mm Zilvia Member Join Date: Oct 2007 Location: Baltimore, Maryland Age: 39 Posts: 173 Trader Rating: (2) Feedback Score: 2 reviews	well i can't afford a new one and it's a t28 on a s14 motor. would the t25 kit still work? like i said i'm a newb to the turbo world so over inform me if possible.

10-31-2007, 02:56 PM	#19
civilized_drifter Zilvia Junkie Join Date: Oct 2006 Location: spring hill, TN Age: 36 Posts: 584 Trader Rating: (0) Feedback Score: 0 reviews	if you want to rebuild it there is a place in nashville that rebuilds turbos called turbo auto. they do great work. (615) 383-6242 __________________

10-31-2007, 07:21 PM	#20
Goldeneye9mm Zilvia Member Join Date: Oct 2007 Location: Baltimore, Maryland Age: 39 Posts: 173 Trader Rating: (2) Feedback Score: 2 reviews	http://cgi.ebay.com/ebaymotors/GT28R...spagenameZWDVW what do you think. i know it's a cheapy but i'm broke. please give honest opinions.

10-31-2007, 07:26 PM	#21
driftn_silvia Zilvia Junkie Join Date: Jul 2005 Location: ventura Posts: 560 Trader Rating: (7) Feedback Score: 7 reviews	heck no...lol. imo i wouldnt buy generic product. i dont trust them. there couple of t28 around in the forum for sale for about the same price. check the F/S section.

10-31-2007, 07:35 PM	#22
trogdor Zilvia Member Join Date: May 2007 Location: dub c Posts: 212 Trader Rating: (0) Feedback Score: 0 reviews	i have the same symptoms but at higher rpms too. im pretty sure it's my turbo inlet gasket because i can see that it's blown

10-31-2007, 07:52 PM	#23
speed_racerx Zilvia Junkie Join Date: Sep 2005 Location: Houston Age: 37 Posts: 523 Trader Rating: (6) Feedback Score: 6 reviews	so... high pitch whistle like sound is bad? fu$#in A.... __________________ Aircraft mechanics, so pilots can have heroes too

10-31-2007, 07:56 PM	#24
Goldeneye9mm Zilvia Member Join Date: Oct 2007 Location: Baltimore, Maryland Age: 39 Posts: 173 Trader Rating: (2) Feedback Score: 2 reviews	well i just had the gaskets replaced. and it's a chatter not a whistle. and i definatly have shaft play.

11-01-2007, 12:35 PM	#25
Goldeneye9mm Zilvia Member Join Date: Oct 2007 Location: Baltimore, Maryland Age: 39 Posts: 173 Trader Rating: (2) Feedback Score: 2 reviews	ok well all the kits i looked at don't include the dual ball bearings. or am i reading them wrong. like this one http://cgi.ebay.com/ebaymotors/COMPL...spagenameZWDVW any more infor would help. i am a mechanic so i assume i could handle this. i just wanna make sure i do it right.

12-18-2007, 04:15 PM	#26
Goldeneye9mm Zilvia Member Join Date: Oct 2007 Location: Baltimore, Maryland Age: 39 Posts: 173 Trader Rating: (2) Feedback Score: 2 reviews	ok i'm re-opening this thread cause it's still making the noise and it's getting louder. ok it only happens when the car in FULLY warmed up and it sounds like sticking a pen in a plastic box fan only it changes consistant w/ the engine rpms. it WILL NOT make the noise sitting still. hence the fustration cause i cant reproduce it w/ the hood open in my garage or driveway. someone has had to had this problem before. i'm not asking for any miracles i just need to know what i should take apart first. any input is welcome. thanks

12-18-2007, 08:08 PM	#28
Goldeneye9mm Zilvia Member Join Date: Oct 2007 Location: Baltimore, Maryland Age: 39 Posts: 173 Trader Rating: (2) Feedback Score: 2 reviews	well i have an s14 sr20 in an s14 so i need a ballbearing turbo. i don't want to down grade to a t25 or a wet bearing t28. but anyway, if you know where to get a t28 bb turbo cheaper than that please sen a lind or some info. thats the cheapest one i'vebeen able to find. thanks

12-18-2007, 04:31 PM	#29
serturbo Leaky Injector Join Date: Feb 2007 Location: Hawaii Age: 50 Posts: 56 Trader Rating: (0) Feedback Score: 0 reviews	What have you done to remedy the problem so far? Change turbo?

12-18-2007, 05:31 PM	#30
Goldeneye9mm Zilvia Member Join Date: Oct 2007 Location: Baltimore, Maryland Age: 39 Posts: 173 Trader Rating: (2) Feedback Score: 2 reviews	well i've checked the shaft for play and it has some but not a huge amount i noticed the other day the my test pipe gasket was leaking but thats not where i'm hearing the sound. i would love to replace the turbo but i'm so strapped right now i can hardly afford to keep food on the table. any gasket or parts donations are greatly appreciated