Forced Induction Superchargers | Turbochargers | Intercoolers

On3 turbo leak question

Thread Tools
 
Search this Thread
 
Old Aug 8, 2023 | 08:18 PM
  #1  
NewGM's Avatar
Thread Starter
Teching In
 
Joined: Aug 2023
Posts: 2
Likes: 0
Default On3 turbo leak question

Hello,

I have an On3 turbo and I have a leak behind my compressor housing when I hooked up my boost leak tester and ran compressed air. What options do I have? The soapy bubbles were all up top and didn't go away when I removed and tightened the turbo bolts a few times.

copper rtv behind the turbo compressor connection and bolts wouldn't cure this right?

Help or ideas appreciated.
Reply
Old Aug 9, 2023 | 01:31 PM
  #2  
Black_Sunshine_99's Avatar
TECH Junkie
10 Year Member
Community Builder
Liked
Community Favorite
iTrader: (11)
 
Joined: Mar 2013
Posts: 3,857
Likes: 837
From: Washington
Default

Originally Posted by NewGM
Hello,

I have an On3 turbo and I have a leak behind my compressor housing when I hooked up my boost leak tester and ran compressed air. What options do I have? The soapy bubbles were all up top and didn't go away when I removed and tightened the turbo bolts a few times.

copper rtv behind the turbo compressor connection and bolts wouldn't cure this right?

Help or ideas appreciated.
Take the compressor housing off and see if there's an o-ring seal out of place, if no o-ring is used for sealing then a very thin layer of silicone will do the job.
It's a machined fit so it won't take very much at all, you could also use flange sealant which isn't as aggressive as silicon is as an adhesive.
Reply
Old Aug 9, 2023 | 01:51 PM
  #3  
NewGM's Avatar
Thread Starter
Teching In
 
Joined: Aug 2023
Posts: 2
Likes: 0
Default

Originally Posted by The ******
Take the compressor housing off and see if there's an o-ring seal out of place, if no o-ring is used for sealing then a very thin layer of silicone will do the job.
It's a machined fit so it won't take very much at all, you could also use flange sealant which isn't as aggressive as silicon is as an adhesive.
This turbo doesn't have an O ring sir. Do I just go around the inside outer edge of the turbo with an rtv? Which color permatex for this job? Ive never heard of a flange sealant and need to try. Thank you
Reply
Old Aug 9, 2023 | 02:09 PM
  #4  
Black_Sunshine_99's Avatar
TECH Junkie
10 Year Member
Community Builder
Liked
Community Favorite
iTrader: (11)
 
Joined: Mar 2013
Posts: 3,857
Likes: 837
From: Washington
Default

Originally Posted by NewGM
This turbo doesn't have an O ring sir. Do I just go around the inside outer edge of the turbo with an rtv? Which color permatex for this job? Ive never heard of a flange sealant and need to try. Thank you
Go around the inside edge of the flange inset where the bolts go, that way the seal is created before the air reaches the retaining bolts.
You can use rtv, just use a very small amount otherwise if you want to get the housing off in the future it'll be tough to get apart.
The flange sealant comes apart easier.
Amazon.com: LOCTITE 518 Gasket Maker & Flange Sealant for Automotive: Anaerobic, Medium-Strength, Non-Corrosive, Flexes with Movement, Solvent-Resistant | Red, 6 ml Tube (PN: 2203452-2096064) : Automotive Amazon.com: LOCTITE 518 Gasket Maker & Flange Sealant for Automotive: Anaerobic, Medium-Strength, Non-Corrosive, Flexes with Movement, Solvent-Resistant | Red, 6 ml Tube (PN: 2203452-2096064) : Automotive
Reply




All times are GMT -5. The time now is 12:38 PM.

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