Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-24-2004, 07:47 AM   #1
Still Working
 
smily's Avatar
 
1994 36' Classic 36
North Charleston , South Carolina
Join Date: Jul 2002
Posts: 1,681
Images: 19
Part Number for Donut Gasket

I need P/N for the exhaust manifold to exhaust pipe donut gasket.

I have a 1990 (MFG 09/1989) P30 Chevy Chassis 454 with FI

Anybody been down this road?

I had an exhaust leak and when I put my hand beside the transition, it was blowing hot air right out of the side.

I removed the flange nuts and the gasket practically fell apart with exception of the metal liner.

The problem I am facing right now is I cannot get the flange fitting to come off of the studs.
__________________

smily is offline   Reply With Quote
Old 03-24-2004, 08:21 AM   #2
Still Working
 
smily's Avatar
 
1994 36' Classic 36
North Charleston , South Carolina
Join Date: Jul 2002
Posts: 1,681
Images: 19
Autozone

Search has these results from Autozone

Unit Price: $8.89
Core Value*: $0.00
Felpro Part No.: 60584
Weight: 0.15 lbs.

Any disputes?

Smily
__________________

smily is offline   Reply With Quote
Old 03-24-2004, 09:00 AM   #3
Rivet Master
 
TomW's Avatar
 
1967 26' Overlander
Huntsville , Alabama
Join Date: Dec 2003
Posts: 2,974
Images: 3
I haven't had the "stuck" problem because I usually spend my time breaking the nuts off.

Is your flange spring loaded so as to be a "floating" fit? If so, I would recommend starting the engine, and tapping the stuck union with an appropriate metal tool.

Don't forget the anti-seize compound at reinstallation.
TomW is offline   Reply With Quote
Old 03-24-2004, 09:15 AM   #4
RivetAddict
 
swebster's Avatar
 
1986 34.5' Airstream 345
Louisville , Kentucky
Join Date: Feb 2003
Posts: 1,861
Images: 4
If you can get the old one out....take it with you to AutoZone or Pep Boys. I replaced mine this way. Neither of them listed it as a "stock part" but they got some from the back and lined them up. Sure enought they had it.

I think it was under $10.

You might want to try a little PBBlaster on those studs. I ended up cutting the studs, removing the exhaust, grinding down the studs then drilling out the flanges for new bolts.

That way if they rust up again I can cut them and they will come out each side with a punch and hammer.
__________________
Steven Webster
1986 Airstream 345 Classic Motorhome
AIR 1760
swebster is offline   Reply With Quote
Old 03-24-2004, 09:30 AM   #5
Rivet Master
 
59toaster's Avatar
 
1959 22' Caravanner
Atlanta , Georgia
Join Date: Feb 2003
Posts: 2,197
Images: 22
Your lucky. You got the bolts off.

My buddy is a pro wrench and helped me with fixing some of my exhaust leaks. 7.5 hours of non stop work later we got the one side done...and not without problems. 2 bolts broke off in the head that we had to drill out. All three at the collector flange broke. Ended up welding then new ones in because we could not get it tapped out correctly down there. They are a odd size if it's late 80's. I still need to do the other side but I think I'm going to headers thanks to Steven.
__________________
1959 22' Caravanner
1988 R20 454 Suburban.
Atlanta, GA
59toaster is offline   Reply With Quote
Old 03-24-2004, 09:37 AM   #6
Rivet Master
 
wb13798's Avatar
 
2004 28' Classic
Currently Looking...
huntsville , Alabama
Join Date: Jul 2002
Posts: 866
Images: 1
you need a torch to heat the manifolds up . other wise the studs break . dont even want to have to remove the manifold.
__________________
AL
2007 chevrolet 2500 duramax 6.6
allison 6 speed
2004 classic 28 WB , Pro Pride P-3 hitch
centramatics wheel ballancers 300-556
wb13798 is offline   Reply With Quote
Old 03-24-2004, 09:44 AM   #7
Airstream Driver
 
PeterH-Airstreamer's Avatar

 
1994 30' Excella
1992 35' Airstream 350
Austin , Texas
Join Date: Feb 2002
Posts: 3,797
Images: 51
Re: Part Number for Donut Gasket

Quote:
Originally posted by smily
I need P/N for the exhaust manifold to exhaust pipe donut gasket.

.......
I always replace those with a solid metal donut gasket. I got mine at the local muffler shop.
Using solid brass nuts on the studs avoids future problems.
__________________
1994 30' Excella Front Kitchen Trailer
1992 350LE Classic Motorhome
AIR #13
PeterH-Airstreamer is offline   Reply With Quote
Old 03-24-2004, 10:10 AM   #8
Still Working
 
smily's Avatar
 
1994 36' Classic 36
North Charleston , South Carolina
Join Date: Jul 2002
Posts: 1,681
Images: 19
Thanks

Good tips!

As for the replacement gasket it is all metal with exception of some asbestos compound in the center.

Mine was not spring loaded. They did have brass nuts which came off almost too easy. The problem I am having is that the studs are not straight in relation to each other, they are not bent but they are not perpendicular to the manifold. So, I just went to Harbor Freight and bought a slide hammer for 15 bucks

I feel this will get the retainer off. I am hoping this repair will only cost about 33 dollars including the slide hammer.

Will update tomorrow.

Smily
smily is offline   Reply With Quote
Old 03-24-2004, 12:29 PM   #9
Airstream Driver
 
PeterH-Airstreamer's Avatar

 
1994 30' Excella
1992 35' Airstream 350
Austin , Texas
Join Date: Feb 2002
Posts: 3,797
Images: 51
Re: Thanks

Quote:
Originally posted by smily
Good tips!

As for the replacement gasket it is all metal with exception of some asbestos compound in the center......
I am talking about all metal, no asbestos. It will burn up sooner or later.
__________________
1994 30' Excella Front Kitchen Trailer
1992 350LE Classic Motorhome
AIR #13
PeterH-Airstreamer is offline   Reply With Quote
Old 03-24-2004, 12:42 PM   #10
Still Working
 
smily's Avatar
 
1994 36' Classic 36
North Charleston , South Carolina
Join Date: Jul 2002
Posts: 1,681
Images: 19
Confusion

Well, I thought it was asbestos so I went out and got the gasket. Upon further review, I see that the gasket is made of like a Lead ring and stuffed with what looks like aluminum foil?

It is not asbestos.

Are you speaking of a solid steel gasket? if so, how does it actually "mold" to the hole or "seal" the not-so-perfectly concentric opening?

I do not see any asbestos or what I am used to seeing in this ring, but it is not a single component. It appears to be lead and aluminum.

Smily
Attached Thumbnails
Click image for larger version

Name:	gasket 003.jpg
Views:	513
Size:	40.0 KB
ID:	5408  
smily is offline   Reply With Quote
Old 03-24-2004, 01:26 PM   #11
Airstream Driver
 
PeterH-Airstreamer's Avatar

 
1994 30' Excella
1992 35' Airstream 350
Austin , Texas
Join Date: Feb 2002
Posts: 3,797
Images: 51
You may have the right gasket. The once I put in my last 2 MH's appeared to be steel and I never had a problem with leaks or having to ever replace them again. A muffler shop will know what we are talking about.

Any good muffler shop will also be able to put new studs in your exhaust manifold. They usually weld a nut to the stud and use a blowtorch to heat the manifold.
__________________
1994 30' Excella Front Kitchen Trailer
1992 350LE Classic Motorhome
AIR #13
PeterH-Airstreamer is offline   Reply With Quote
Old 03-24-2004, 02:32 PM   #12
Rivet Master
 
59toaster's Avatar
 
1959 22' Caravanner
Atlanta , Georgia
Join Date: Feb 2003
Posts: 2,197
Images: 22
Re: Confusion

Quote:
Originally posted by smily
Well, I thought it was asbestos so I went out and got the gasket. Upon further review, I see that the gasket is made of like a Lead ring and stuffed with what looks like aluminum foil?

It is not asbestos.

Are you speaking of a solid steel gasket? if so, how does it actually "mold" to the hole or "seal" the not-so-perfectly concentric opening?

I do not see any asbestos or what I am used to seeing in this ring, but it is not a single component. It appears to be lead and aluminum.

Smily
Did it not come with the inner steel ring? That looks lidentical to the ones on my Burb but they have a metal peice that goes into the flange onthe engine side. It can be removed.
__________________
1959 22' Caravanner
1988 R20 454 Suburban.
Atlanta, GA
59toaster is offline   Reply With Quote
Old 03-24-2004, 02:33 PM   #13
Rivet Master
 
LOST , Hawaii
Join Date: Jun 2002
Posts: 2,193
Quote:
They usually weld a nut to the stud
That is the only way to remove broken bolts and studs. It puts some heat in to help break it loose and gives something good to turn with; plus you don't have the problem of the harder bolt pushing the drill bit into the softer cast iron.

John
74Argosy24MH is offline   Reply With Quote
Old 03-25-2004, 07:05 AM   #14
Still Working
 
smily's Avatar
 
1994 36' Classic 36
North Charleston , South Carolina
Join Date: Jul 2002
Posts: 1,681
Images: 19
More confusion

Now I am really confused,

I have the Metal piece that toaster refers to but I thought that was a piece of the deteriorated gasket. Here is a photo of the two pieces side by side. I thought that the smaller piece was a remnant of the old one.

It is not too late for me to get it back in, I have to get a thread chaser to clean up some threads on the studs.

Is the piece on the right supposed to go back in the manifold?
Attached Thumbnails
Click image for larger version

Name:	gasket 005.jpg
Views:	624
Size:	48.0 KB
ID:	5439  
smily is offline   Reply With Quote
Old 03-25-2004, 07:07 AM   #15
Still Working
 
smily's Avatar
 
1994 36' Classic 36
North Charleston , South Carolina
Join Date: Jul 2002
Posts: 1,681
Images: 19
A shot of the studs

See how they are not perpendicular to the manifold portal?
Attached Thumbnails
Click image for larger version

Name:	gasket 009.jpg
Views:	165
Size:	56.8 KB
ID:	5441  
smily is offline   Reply With Quote
Old 03-25-2004, 07:10 AM   #16
Still Working
 
smily's Avatar
 
1994 36' Classic 36
North Charleston , South Carolina
Join Date: Jul 2002
Posts: 1,681
Images: 19
Clean shot of mating

I got the old parts out nut the exhaust pipe does not want to move too much. I had to force the new gasket between the studs because I did not want to risk ruining the threads on the studs while re-fitting the pipe to the manifold.
Attached Thumbnails
Click image for larger version

Name:	gasket 008.jpg
Views:	207
Size:	57.5 KB
ID:	5442  
smily is offline   Reply With Quote
Old 03-25-2004, 07:11 AM   #17
Still Working
 
smily's Avatar
 
1994 36' Classic 36
North Charleston , South Carolina
Join Date: Jul 2002
Posts: 1,681
Images: 19
gasket in

Here is the new gasket inplace. I may have to pull it back out to get the steel piece back in, if needed.
Attached Thumbnails
Click image for larger version

Name:	gasket 014.jpg
Views:	168
Size:	52.1 KB
ID:	5443  
smily is offline   Reply With Quote
Old 03-25-2004, 07:18 AM   #18
Rivet Master
 
TomW's Avatar
 
1967 26' Overlander
Huntsville , Alabama
Join Date: Dec 2003
Posts: 2,974
Images: 3
It would on my Suburban

Yes, on my Suburban's 454, the metal piece was part of the whole assembly.

But what really concerns me is your pictures look just like my setup EXCEPT on mine, there are conical shaped springs, a couple of inches long, under the nuts to allow the joint to float.

I suspect your setup had them at one time or else why would the studs be so long? Also, my nuts (on the Burb) are not that long.

If you did not get many miles out of your last donut, you may want to investigate adding the springs.

Just a thought,
Tom
TomW is offline   Reply With Quote
Old 03-25-2004, 08:37 AM   #19
Still Working
 
smily's Avatar
 
1994 36' Classic 36
North Charleston , South Carolina
Join Date: Jul 2002
Posts: 1,681
Images: 19
Whole assembly?

When you say whole assembly what exactly do you mean?

Initially, I was under the impression that the steel ring, depicted on the right side of the side by side photo, was an infrstructure to the piece on the left.

I guess what I am trying to say, I thought that the steel ring was covered in lead and aluminum to form what is on the left side of the picture. The steel ring is what is residual of the deteriorated gasket. (Clear as mud?)

A different language perhaps, do both pieces go into the intersection? Does the steel ring on the right side of the photo need to go back into the intersection along with the new gasket on the left?

Or does the new lead gasket go in without the steel ring on the right?

Smily
smily is offline   Reply With Quote
Old 03-25-2004, 10:13 AM   #20
Rivet Master
 
TomW's Avatar
 
1967 26' Overlander
Huntsville , Alabama
Join Date: Dec 2003
Posts: 2,974
Images: 3
Re: Whole assembly?

Quote:
Originally posted by smily
When you say whole assembly what exactly do you mean?

Initially, I was under the impression that the steel ring, depicted on the right side of the side by side photo, was an infrstructure to the piece on the left.
I am having trouble remembering exact details, so bear with me.

Upon my disassembly, I had some asbestos-donut-looking-thing, and a steel ring that went together to make one assembly. What I cannot clearly remember is if the new donut I bought came with a new steel ring integral to its construction, or I reused my existing steel ring with the new shiny sealing component.

From your posts, I was under the impression your new part did not come with a steel ring as part of its component list. In that case you would obviously need to reuse the steel ring.

Measure IDs and ODs of your old and new parts. Hopefully you will find conclusive proof of what to do with the steel ring.

Good luck,
Tom
__________________

TomW is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.



All times are GMT -6. The time now is 04:41 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.