Reply
 
Thread Tools Search this Thread Display Modes
 
Old 08-30-2005, 02:53 PM   #1
2 Rivet Member
 
Nick Danger's Avatar
 
1989 37' Airstream 370
Beverly Hills , Florida
Join Date: Jul 2004
Posts: 66
Images: 2
Post Changing valve cover gaskets on 460

Anyone changed valve cover gaskets on a Ford 460? Mine are leaking on my 19889 370 LE and I need to replace them. I just wanted to know if there were any anamolies with the 460 or any special order to do the work.

Also, there are 4 small tubes that traverese each valve cover gasket. They appear to terminate near the spark plug behind the heat shields. Any idea what these are?

Many thanks for your help/advice.
__________________

__________________
Nick Danger, Third Eye
Nick Danger is offline   Reply With Quote
Old 09-05-2005, 07:49 PM   #2
RivetAddict
 
swebster's Avatar
 
1986 34.5' Airstream 345
Louisville , Kentucky
Join Date: Feb 2003
Posts: 1,861
Images: 4
Nick,
While I haven't worked on a 460. I did replace the gaskets on my 454 last fall. Other than moving things out of the way to get to them it was pretty straightforward.

One question on the tubes. On the 454 there was an AIR pump system which injected pressurized air from two belt driven pumps into the manifolds as an emissions system. Are these what you are talking about with the tubes?

Any chance you could post a picture?
__________________

__________________
Steven Webster
1986 Airstream 345 Classic Motorhome
AIR 1760
swebster is offline   Reply With Quote
Old 09-05-2005, 08:23 PM   #3
Well Preserved

 
1993 21' Sovereign
Colfax , North Carolina
Join Date: Jun 2003
Posts: 20,193
Quote:
Originally Posted by Nick Danger
Anyone changed valve cover gaskets on a Ford 460? Mine are leaking on my 19889 370 LE and I need to replace them. I just wanted to know if there were any anamolies with the 460 or any special order to do the work.

Also, there are 4 small tubes that traverese each valve cover gasket. They appear to terminate near the spark plug behind the heat shields. Any idea what these are?

Many thanks for your help/advice.
Nick, I think Steven is right, those sound like AIR tubes. If you really, REALLY want to know, A.I.R. is an acronym for Air Injector Reactor, or an air injection system. They will no doubt be very brittle, and subject to breaking VERY easily. If they do (and they might) you will have two choices: either buy replacements from Ford, or disconnect the tubes, and take the drive belt off the smog pump. If you have emissions testing, and your MoHo is one that has to be tested, you pretty much will have to replace them. If possible, and if they are in the way, put some penetrating oil on the threads going into the manifolds, and let them sit overnight. This will (hopefully) reduce the tubes' tendency to round off, or crush, or break off.
If by some chance they are not AIR tubes, they could well be there to run the plug wires through, to keep the wires from being cooked by the engine heat.
If you can, post a photo of them, maybe we will recognize them.
__________________
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
Terry
overlander63 is offline   Reply With Quote
Old 09-07-2005, 02:17 PM   #4
2 Rivet Member
 
Nick Danger's Avatar
 
1989 37' Airstream 370
Beverly Hills , Florida
Join Date: Jul 2004
Posts: 66
Images: 2
I'm going to try to post a picture.


Here it goes:
Attached Thumbnails
Click image for larger version

Name:	valve covers 046 (Small).jpg
Views:	141
Size:	34.9 KB
ID:	14528  
__________________
Nick Danger, Third Eye
Nick Danger is offline   Reply With Quote
Old 09-07-2005, 02:20 PM   #5
2 Rivet Member
 
Nick Danger's Avatar
 
1989 37' Airstream 370
Beverly Hills , Florida
Join Date: Jul 2004
Posts: 66
Images: 2
Here is a better lighted picture. Note : tubes next to spark plug wires are the ones in question.
Attached Images
 
__________________
Nick Danger, Third Eye
Nick Danger is offline   Reply With Quote
Old 09-07-2005, 02:21 PM   #6
2 Rivet Member
 
Nick Danger's Avatar
 
1989 37' Airstream 370
Beverly Hills , Florida
Join Date: Jul 2004
Posts: 66
Images: 2
Ouch!! That didn't come out as planned.........
__________________
Nick Danger, Third Eye
Nick Danger is offline   Reply With Quote
Old 09-07-2005, 02:35 PM   #7
RivetAddict
 
swebster's Avatar
 
1986 34.5' Airstream 345
Louisville , Kentucky
Join Date: Feb 2003
Posts: 1,861
Images: 4
Nick,
Yeah, those look like air injection tubes. Getting them off is a real bear because they are threaded into the exhaust manifold and the only thing you can get on them is an open end or tube wrench. I broke virtually every one on the drivers side twisting the tubes in the removal process, but I was taking them off to add headers.

From your pics they look like they are in pretty good shape. I would suggest hitting them with something like PB Blaster every day and try each one a little bit at a time. It may take a while but they might come out.

Of course, whenever I end up trying to be patient with a rusted nut it's only a matter of time before I get out the propane tourch and the angle grinder....followed by a late night trip to the parts store....but maybe that's just me

BTW - Those are some serious heat shields!
__________________
Steven Webster
1986 Airstream 345 Classic Motorhome
AIR 1760
swebster is offline   Reply With Quote
Old 09-08-2005, 08:50 AM   #8
2 Rivet Member
 
Nick Danger's Avatar
 
1989 37' Airstream 370
Beverly Hills , Florida
Join Date: Jul 2004
Posts: 66
Images: 2
Stephen..


Thanks for the info.

Where does the other end of the tube terminate?

Are the tubes readily available from an auto parts store or will Mr. Ford stick it to me?

Re: the heat shields - I've never had a heat/plug wire issue, so I guess they work as designed.
__________________
Nick Danger, Third Eye
Nick Danger is offline   Reply With Quote
Old 09-08-2005, 09:00 AM   #9
Rivet Master
 
87MH's Avatar
 
1978 31' Sovereign
Texas Airstream Harbor , Zavalla, in the Deep East Texas Piney Woods on Lake Sam Rayburn
Join Date: Jan 2003
Posts: 2,435
Images: 292
Quote:
Originally Posted by Nick Danger
Stephen..Where does the other end of the tube terminate?
Nick:

I'll jump on this one -

The tubes terminate dead center of the exhaust manifold.

Installed, they look as if they take up a lot of space in the manifold interior and may restrict the exhaust gasses in the manifold somewhat.

The purpose of the tubes are to inject air from the engine driven (pollution) compressor into the exhaust (as close to the engine as possible) in order to meet federal mandated exhaust emission limits.

Some 454's actually have two pollution compressors.

In most aftermarket header installations these are not reinstalled - it's the owner's call, though, some states are more aggresive than others when it comes to enforcing the original polllution equipment requirements on older vehicles.
__________________
Dennis

"Suck it up, spend the bucks, do it right the first time."

WBCCI # 1113
AirForums #1737

Trailer '78 31' Sovereign

Living Large at an Airstream Park on the Largest Lake Totally Contained in Texas
Texas Airstream Harbor, Inc.
87MH is offline   Reply With Quote
Old 09-08-2005, 09:55 AM   #10
Rivet Master
 
ALANSD's Avatar

 
1966 26' Overlander
Woodstock , Georgia
Join Date: Feb 2002
Posts: 8,463
in our state, vehicles over 10,000 pounds are exempt.
__________________
1966 Overlander
AIR #005
Please visit our blogs and web pages:
OUR AIRSTREAM PASSION! BLOG
RESTORING AN AIRSTREAM
Our AIRSTREAM and TIN CAN TOURIST Rallys
ALANSD is offline   Reply With Quote
Old 09-08-2005, 12:12 PM   #11
RivetAddict
 
swebster's Avatar
 
1986 34.5' Airstream 345
Louisville , Kentucky
Join Date: Feb 2003
Posts: 1,861
Images: 4
Nick,
Dennis is right, on the 454 they actually terminate up inside the head about 3/4" - 1" from the exhaust valve. When you see them you begin to understand why mid eighties big blocks have "breathing" issues.

Not sure if they still offer replacements for the 460. I did find them for the 454 but the replacement cost exceeded the cost of the headers I was installing.

All of this seems like a lot of work what should be a simple valve cover replacement. Try soaking them with PBBlaster and see if you can even get the fittings to move. I would hate to see this turn into an exhaust project on you.
__________________
Steven Webster
1986 Airstream 345 Classic Motorhome
AIR 1760
swebster is offline   Reply With Quote
Old 09-08-2005, 06:22 PM   #12
2 Rivet Member
 
Nick Danger's Avatar
 
1989 37' Airstream 370
Beverly Hills , Florida
Join Date: Jul 2004
Posts: 66
Images: 2
Talking

Thanks for the tips, fellas.


As I'm going to Daytona for Biketoberfest in late October and taking friends in the coach, I think I will put this project on the back burner. I'd rather keep the small leak and replenish the lost oil on that trip ( only 300 miles round trip) than take the chance of hosing something up and not being able to complete a timely fix. I'll tackle it after the hedonism of Daytona.

Again, thanks for the tips. I'm sure glad I asked.
__________________
Nick Danger, Third Eye
Nick Danger is offline   Reply With Quote
Old 09-08-2005, 06:28 PM   #13
Well Preserved

 
1993 21' Sovereign
Colfax , North Carolina
Join Date: Jun 2003
Posts: 20,193
Quote:
Originally Posted by Nick Danger
Thanks for the tips, fellas.
Again, thanks for the tips. I'm sure glad I asked.
Nick, I think on the 460, the tubes terminate at an air pump check valve, also known as a gulp valve. From there, a rubber hose leads to a diverter valve, then to the smog pump.
__________________

__________________
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
Terry
overlander63 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Thetford valve rebuild mkeith54 Waste Systems, Tanks & Totes 17 10-15-2007 03:37 PM
Black & Grey valve trouble camphost Waste Systems, Tanks & Totes 51 08-18-2006 09:45 AM
cover for univolt maznblu Electrical - Systems, Generators, Batteries & Solar 2 09-15-2002 08:02 PM
city water inlet valve failure? JohnGalt48 Fresh Water Systems 2 08-01-2002 05:43 PM
Trailer Life cover 83Excella Our Community 6 06-16-2002 11:14 AM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 07:28 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.