The 1947 - Present Chevrolet & GMC Truck Message Board Network

Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1988 - 1998 GMT400 Chevy & GMC Pickups Message Board


Thread Tools Display Modes
Old 02-25-2019, 10:21 PM   #1
Registered User
Join Date: Jan 2012
Location: Tyler Texas
Posts: 218
5.7L Vortec Intake Breather assembly Gasket

Underneath the breather assembly hose where it connects to the throttle body there is a round orange gasket. Mine is gone.
Does anybody have a party number or where to buy?

Mine is gone.

1999 suburban OBS 5.7L RWD.

I am getting codes PO171/174 and I am thinking there is where it is sucking air.

shultzee13 is offline   Reply With Quote
Old 02-26-2019, 07:55 AM   #2
State of Confusion!

Palf70Step's Avatar
Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 38,732
Re: 5.7L Vortec Intake Breather assembly Gasket

I normall use spray carb cleaner and spray the areas where I think it is leaking to see if how it run changes. If it does that is where the leak is.

1981 GMC High Sierra SWB Stepside

Member of Louisiana Classic Truck Club (LCTC)
Board Vendors
Bill's Gallery
Life isn't tied with a bow, but it's still a gift.
Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!
It's scary when you start making the same noises as your coffee maker.
Palf70Step is offline   Reply With Quote
Old 03-06-2019, 06:57 PM   #3
Registered User
speedygonzales's Avatar
Join Date: Jan 2006
Location: Smithfield, VA
Posts: 1,384
Not gonna find it

Not only is that O ring not available. Neither is the original elbow the oring was in.

Why not just put a bead of RTV around the inner area where the o ring would be and seat it and leave it. When it dries, if you need to remove it, it will peel off and you can always replace it.

I noticed the K&N filter assembly has an elbow that attaches to the throttle body. Perhaps they have replacement parts for their assemblies.

Part number 57-3013-2
99 Z71 (98 body style)
Pride and joy
speedygonzales is offline   Reply With Quote
Old 03-22-2019, 05:22 PM   #4
Senior Member
AussieinNC's Avatar
Join Date: Jun 2017
Location: Cherryville, NC
Posts: 1,031
Re: 5.7L Vortec Intake Breather assembly Gasket

Take the elbow where the O ring seats to local parts store...they usually have a selection of O rings...try and find a Viton one...usually Orange or Blue,,,rather than a cheap black one....

Just make sure the section thickness is correct....too thin and it wont seal, too thick and it wont fit into the port....

The original O rings haven't been available for a while now...

Family and country before all others...
1967 C-10 LWB (Project)
2001 GMC Sierra
2006 Chevy Silverado (Daily Driver)
AussieinNC is online now   Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -4. The time now is 08:09 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Copyright 1997-2013