2006 G6 GTP Exhaust system leak - parts question? - Pontiac G6 Forum
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 07-16-2014, 07:18 PM Thread Starter
Join Date: Jul 2010
Location: Montreal, Quebec, Canada
Posts: 51
2006 G6 GTP Exhaust system leak - parts question?

Ok, so my G6 has started to run louder indicative of an exhaust leak this week. Today I had the opportunity to jack her up and check it out. It seems as if 2 gaskets are the culprit (I was initially thinking flex pipe).

So I took some pictures, and was looking at a parts diagram and just want to make sure that I get the right gaskets because the parts diagram doesn't seem to have the flex pipes included in it.

I took some pictures of the leaks. First one is just after the small flex pipe, and second one is just after the second flex pipe.

First pic the leak is right after the flex pipe on the line going to the front of the engine:

Close up:

The second leak is right after the flex pipe on the common line before the resonator:


Overall view:

So according to this diagram I believe I need gasket 12 and gasket 8, but I'm not entirely sure because as you can see between the common line and the resonator there is only one joint and one gasket - on my car I have 2 joints and 2 gaskets because of the flex pipe.

Finally, while I'm down there doing all that I figured I may as well change the first gasket (not circled in the last picture) on the common line. Would that be another #8 gasket?

If I have to drill these bolts out, what grade bolts should I replace it with? Are the parts of the exhaust that the studs go through threaded or is a nut on the other end enough?

Is there a special paste, or sealant I should use with the new gaskets? Whats the best way to clean off the surfaces to prepare for the new gasket?

Thanks for all the help.
y2j514 is offline  
Sponsored Links
post #2 of 3 (permalink) Old 07-18-2014, 01:32 PM Thread Starter
Join Date: Jul 2010
Location: Montreal, Quebec, Canada
Posts: 51
Ok so I bought what I hope are the right gaskets for the job... Apparently dealer only part. Napa and Car quest didn't have them even listed.

Does anybody recommend I put some sort of high heat silicone with the gasket or just the gasket on it's own? What's the best way to clean and prep the surface? Brake cleaner and a wire brush?
y2j514 is offline  
post #3 of 3 (permalink) Old 07-23-2014, 09:25 AM
Junior Member
Join Date: Mar 2014
Posts: 7
Not sure about the silicone but definitely clean it up. Not sure about brake cleaner but lacquer thinner works. Have a metal bristle brush handy too.

Try rockauto.com for parts also. I use them religiously and they give you a great selection of brands to use for each part. Cheap up through top brand names.
G6GTP2006NH is offline  
Sponsored Links

  Pontiac G6 Forum > Technical Discussion & Modifications > General Maintenance

Quick Reply

Register Now

In order to be able to post messages on the Pontiac G6 Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
G6 GT,GTP,GXP Exhaust System mike927 Powertrain Performance Modifications 157 07-18-2014 08:15 AM
question about loose motor mounts / front pipe exhaust flex leak kq702 Problems and Solutions 2 08-29-2013 11:32 PM
exhaust system question Betcmrekoapl Problems and Solutions 1 04-09-2012 03:34 PM
2006 G6 GTP Exhaust options DaricHughes Powertrain Performance Modifications 7 04-25-2010 08:00 AM
2006 GTP question? bucklwi1 G6 Buyer's Guide/General Information 8 09-28-2006 05:59 PM

Posting Rules  
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome