Forced Induction Superchargers | Turbochargers | Intercoolers

Bad Turbo??

Thread Tools
 
Search this Thread
 
Old Apr 27, 2008 | 11:32 AM
  #1  
Super Slow SS's Avatar
Thread Starter
TECH Enthusiast
iTrader: (9)
 
Joined: Oct 2005
Posts: 702
Likes: 0
From: Greenville, Raleigh NC
Question Bad Turbo??

Ok so I got my turbo kit finished being fabbed up last night and was checking everything out and I found a good amount of oil pooled up in my compresser housing. So I cleaned it out check the bolts .. few of them weren't real tight going to the center section so I torqued them down started the car with the housing off .. no leak .. sweet .. while I was wiring the return pump and the wide band I left the intercooler piping off .. and low and be hold it filled back up with oil so I took the down pipe off .. thats full of oil too ... Bad turbo or am I really doing something wrong .. btw its a Precision 74mm suppose to be brand new when I ordered it.
Reply
Old Apr 27, 2008 | 12:24 PM
  #2  
1999T/A30th1336's Avatar
Staging Lane
iTrader: (1)
 
Joined: Aug 2005
Posts: 52
Likes: 0
Default

did you have the car running? was the turbo actully spinning?
Reply
Old Apr 27, 2008 | 01:02 PM
  #3  
Super Slow SS's Avatar
Thread Starter
TECH Enthusiast
iTrader: (9)
 
Joined: Oct 2005
Posts: 702
Likes: 0
From: Greenville, Raleigh NC
Default

Originally Posted by 1999T/A30th1336
did you have the car running? was the turbo actully spinning?
yea it spun fine .. funny thing is I cleaned it up and started it and it didnt leak when the car was running .. but when you cut it off .. it starts leaking.
Reply
Old Apr 27, 2008 | 01:28 PM
  #4  
Super Slow SS's Avatar
Thread Starter
TECH Enthusiast
iTrader: (9)
 
Joined: Oct 2005
Posts: 702
Likes: 0
From: Greenville, Raleigh NC
Default

darn browser ..
Reply
Old Apr 27, 2008 | 09:47 PM
  #5  
Super Slow SS's Avatar
Thread Starter
TECH Enthusiast
iTrader: (9)
 
Joined: Oct 2005
Posts: 702
Likes: 0
From: Greenville, Raleigh NC
Default

bumpity for the night crowd, would like to know something before I put it in the mail tomorrow.
Reply
Old Apr 27, 2008 | 09:53 PM
  #6  
AFireInsideSS's Avatar
Registered User
 
Joined: Apr 2008
Posts: 24
Likes: 0
From: Fairfax, VA
Default

I cant believe nobody has jumped in to help you out on this yet, I threw a bump at your other post. I was looking at the STS kit but this whole deal with the nightmare of an oiling system is really turning me off to the idea, and seeing as how I dont want to loose my A/C, the front mount is touch and go...oh god, dont make me buy a proocharger.....
Reply
Old Apr 28, 2008 | 12:11 AM
  #7  
Schantin's Avatar
12 Second Club
20 Year Member
iTrader: (6)
 
Joined: Jun 2004
Posts: 1,501
Likes: 7
From: Ft. Irwin, California (But Virginia is home)
Default

Originally Posted by Super Slow SS
yea it spun fine .. funny thing is I cleaned it up and started it and it didnt leak when the car was running .. but when you cut it off .. it starts leaking.
Sounds like the check valve on the top of the oil feed is stuck open. There is a check valve that is supposed to close to prevent oil from pooling into the turbine when the engine is off. Since you don't seem to have a prob when the engine is running (which means the oil pump is scavanging the oil from the turbo), sounds like this is your prob.

BTW, sounds like you have an aftermarket turbine on the car. Is this a "homebuilt" kit? If so, did you add a restrictor checkvalve to the oil feed entering the turbine? If not....then this is most likely your prob Good luck
Reply
Old Apr 28, 2008 | 10:10 AM
  #8  
Super Slow SS's Avatar
Thread Starter
TECH Enthusiast
iTrader: (9)
 
Joined: Oct 2005
Posts: 702
Likes: 0
From: Greenville, Raleigh NC
Default

Actually it is a "homebuilt" setup and it is not a sts turbo or anything, I am using a Precision GTS which is suppose to have the oil reduicer built in so I dont have to run nitrous jets or whatever to limit flow. I have some pics of the setup to get a better idea I should get them posted tonight. I have a call put into the company right now to see what they think the prob is. Just wondering if there is anything else I can do before I send it back and wait forever to get it back.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Apr 28, 2008 | 11:13 AM
  #9  
70Stang's Avatar
11 Second Club
iTrader: (2)
 
Joined: Mar 2004
Posts: 773
Likes: 0
Default

Originally Posted by 70Stang
Is your scavenge pump working? Is the turbo new? You drain line is not kinked? Pics of outlet / pump setup?
You said you were wiring the return pump, did you not have it working when you started the car? Like Schantin said, is your check valve installed correctly?
Reply
Old Apr 28, 2008 | 11:46 AM
  #10  
Super Slow SS's Avatar
Thread Starter
TECH Enthusiast
iTrader: (9)
 
Joined: Oct 2005
Posts: 702
Likes: 0
From: Greenville, Raleigh NC
Default

Originally Posted by 70Stang
You said you were wiring the return pump, did you not have it working when you started the car? Like Schantin said, is your check valve installed correctly?
I just had the pump hot wired, I was running the wires into the car to the relay and cleaning things up. Yes the pump was on the entire time the car was running .. and as soon as the car shut off I unhooked the pump (power) what check valve? how do I check that?
Reply
Old Apr 28, 2008 | 11:53 AM
  #11  
Schantin's Avatar
12 Second Club
20 Year Member
iTrader: (6)
 
Joined: Jun 2004
Posts: 1,501
Likes: 7
From: Ft. Irwin, California (But Virginia is home)
Default

Originally Posted by Super Slow SS
I just had the pump hot wired, I was running the wires into the car to the relay and cleaning things up. Yes the pump was on the entire time the car was running .. and as soon as the car shut off I unhooked the pump (power) what check valve? how do I check that?
Assuming you have one installed, it's on the turbine where the oil feed line enters the turbo. Looks like a cylindrical brass tube. Unbolt it and try to blow air through the valve (BTW, it's a 1-way valve....should have an arrow showing the direction of flow). If you can blow air through it, the valve is bad. It has a spring/checkball that is positioned to the closed position. The force of the oil feed from the engine oil pump overcomes the spring pressure and opens the checkball, allowing oil into the turbine for lubrication/cooling. When the engine is off, the checkball closes preventing oil from draining into the turbine. When oil pools in the turbine, it gets blown past the turbine ring seals and ends out in the intake and exhaust.

If you don't have a checkvalve installed.....do this 1st. Good chance this will solve your problem. Also, if the valve is installed backwards it will cause similiar probs. Good luck
Reply
Old Apr 28, 2008 | 12:06 PM
  #12  
70Stang's Avatar
11 Second Club
iTrader: (2)
 
Joined: Mar 2004
Posts: 773
Likes: 0
Default

^ What he said ^
Reply
Old Apr 28, 2008 | 07:47 PM
  #13  
Super Slow SS's Avatar
Thread Starter
TECH Enthusiast
iTrader: (9)
 
Joined: Oct 2005
Posts: 702
Likes: 0
From: Greenville, Raleigh NC
Default

wow ironicly I talked to the guy I got the turbo from today and he said the same thing but he said I Needed a valve in the return line between the pump and oil pan cus it was just flowing back when I cut the pump off.
Reply
Old Apr 28, 2008 | 09:24 PM
  #14  
70Stang's Avatar
11 Second Club
iTrader: (2)
 
Joined: Mar 2004
Posts: 773
Likes: 0
Default

No - you need a check valve in the FEED line.
Reply
Old Apr 28, 2008 | 09:26 PM
  #15  
Super Slow SS's Avatar
Thread Starter
TECH Enthusiast
iTrader: (9)
 
Joined: Oct 2005
Posts: 702
Likes: 0
From: Greenville, Raleigh NC
Default

ok how about both? I dont see how the feed line would matter cus its not being pumped anymore but I am willing to try anything plus wont it just stay open since thats the direction the oil is flowing anyway?
Reply
Old Apr 28, 2008 | 09:27 PM
  #16  
Super Slow SS's Avatar
Thread Starter
TECH Enthusiast
iTrader: (9)
 
Joined: Oct 2005
Posts: 702
Likes: 0
From: Greenville, Raleigh NC
Default

next step, where can I get a check valve .. prefer local cus I want to get it up and running asap.
Reply
Old Apr 28, 2008 | 10:37 PM
  #17  
RooRnZ28's Avatar
10 Second Club
20 Year Member
Photogenic
iTrader: (14)
 
Joined: Dec 2005
Posts: 1,392
Likes: 0
From: Central California
Default

+1 on adding the check valve. The one you need is part # 7768k51 from Mcmastercarr.com and you only need one on the oil feed going into the turbo.
Reply
Old Apr 29, 2008 | 07:14 AM
  #18  
70Stang's Avatar
11 Second Club
iTrader: (2)
 
Joined: Mar 2004
Posts: 773
Likes: 0
Default

Can you post some pictures of your setup?
Reply
Old Apr 29, 2008 | 09:43 AM
  #19  
Super Slow SS's Avatar
Thread Starter
TECH Enthusiast
iTrader: (9)
 
Joined: Oct 2005
Posts: 702
Likes: 0
From: Greenville, Raleigh NC
Default

Sorry I don't have any real good pics of the finished product but maybe you can get the idea by these. I should be bolting everything back up Wed. night and putting the check valves in.





Last edited by Super Slow SS; Apr 29, 2008 at 09:55 AM.
Reply
Old May 1, 2008 | 11:55 AM
  #20  
Super Slow SS's Avatar
Thread Starter
TECH Enthusiast
iTrader: (9)
 
Joined: Oct 2005
Posts: 702
Likes: 0
From: Greenville, Raleigh NC
Default

(Sorry for the long post see bottom for clifts notes)
ok I got the check valve put in the feed line yesterday. Got the intercooler piping buttoned up and the BOV welded in vaccume lines ran wide band mounted in the downpipe about 8-9" from the outlet of the turbo. Started the car up let it run a min, cut it off checked the turbo .. no real oil in the housing this time, great news, seems like the check valve is working. so I put the piping on and take it for a run, no boost. Pull it back on the lift and notice that the charge pipe came off the turbo and has some oil residue on it. Clean it up notice a little bit in the turbo clean that out .. install a nitrous jet thinking that It was getting some blow by under load take another run .. still no boost, guage comes all the way out of vaccume but wont budge past 0. Turbo sounds like its about to take off on its own back there but doesnt sound like its under and load just free spinning. Checked and double checked all my pipes all clamps are tight but I cant make boost, any ideas on what gives? Also I did notice that my wastegate is open just a little at idle is this normal?

All my pipes are tight and everything is connected but I cant make boost .. will come out of vaccume but no boost. Please help.
Reply



All times are GMT -5. The time now is 06:22 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE