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8V71 Upper & Lower Exhaust Pipes

This is a public forum to discuss Eagle related technical issues. If you are having a problem with your Eagle, this is the place to find help.
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DoubleEagle
Club Member
Club Member
Posts: 280
Joined: Wed Feb 14, 2018 9:26 pm
Bus Model: 1975 Model 05 Eagle
1982 Model 10 Eagle
1984 Model 10 Eagle
1994 Model 15-45 Eagle
Location: Dayton, Ohio

8V71 Upper & Lower Exhaust Pipes

Post by DoubleEagle »

Manifold connection
Manifold connection
Manifold end
Manifold end
Lower pipe at muffler
Lower pipe at muffler
Mid Joint
Mid Joint
This is primarily for the benefit of Jim Cummings to show the upper and lower pipes between the manifolds and the mufflers. The part number for the upper pipe is 01-0724-001 for earlier models, and 014-0724-001 for a 1984 Model 10. The lower pipe is 01-0724-002, and 054-0726-010. There is a gasket between the two pipes, and if the joint is solid, it is probably best to leave it alone. To take the two pipes off together just requires taking off the band clamp at the manifold, and the muffler clamp at the bottom. If everything is out of the A/C compartment, it will be a lot easier on the passenger side. The driver side will probably require hatch access from the floor.

Since you had a problem with the fitting at the manifold, I wonder if it was caused by the exhaust being bumped from below, or a loose muffler pipe support that put most of the support load on the band clamp. The whole system from manifold to the tailpipe is just supported by these two points.
Bottom of manifold
Bottom of manifold
Walter
Dayton, Ohio
1975 Silvereagle Model 05, 8V71, 4 speed Spicer
1982 Eagle Model 10, 6V92, 5 speed Spicer
1984 Eagle Model 10, 6V92 w/Jacobs, Allison HT740
1994 Eagle Model 15-45, Series 60 w/Jacobs, Allison HT746
jcb
Posts: 95
Joined: Mon Nov 26, 2012 10:37 am
Bus Model: 1981 Eagle Model 10

Re: 8V71 Upper & Lower Exhaust Pipes

Post by jcb »

Walter,
   Thank you so much for all of your help regarding this. I've totally replaced the right side, utilizing your parts.....and plan on pulling the radiator on the left to get at that one. I'll also attempt to fix some other leaking issues there while its apart.
    I'll keep you informed.

Thanks again,
Jim
Jim Cummings
1983 Model 10
8V71
Auto Trans
Tour Bus Conversion Ex-Senator Coach
http://www.thejimcummingsband.com" onclick="window.open(this.href);return false;
User avatar
DoubleEagle
Club Member
Club Member
Posts: 280
Joined: Wed Feb 14, 2018 9:26 pm
Bus Model: 1975 Model 05 Eagle
1982 Model 10 Eagle
1984 Model 10 Eagle
1994 Model 15-45 Eagle
Location: Dayton, Ohio

Re: 8V71 Upper & Lower Exhaust Pipes

Post by DoubleEagle »

Jim,
Unless you are taking out the radiator for other reasons, you might not have to in order to change the pipes. Once the muffler is out, there is room to get the pipes back on, provided the coach is jacked up enough to give you elbow room. How did the welding work out on the pipes?
Walter
Dayton, Ohio
1975 Silvereagle Model 05, 8V71, 4 speed Spicer
1982 Eagle Model 10, 6V92, 5 speed Spicer
1984 Eagle Model 10, 6V92 w/Jacobs, Allison HT740
1994 Eagle Model 15-45, Series 60 w/Jacobs, Allison HT746
jcb
Posts: 95
Joined: Mon Nov 26, 2012 10:37 am
Bus Model: 1981 Eagle Model 10

Re: 8V71 Upper & Lower Exhaust Pipes

Post by jcb »

I believe you on the access from the bottom and top Walter, but I've done that to this point and it is just too difficult for me by myself. It just is. Besides, there are a number of inaccessible oil leaks that have to be addressed. I don't WANT to take the radiator out, but am simply out of options. Good news is, I accomplished the full replacement of the right side alone.....and it's tight. The bottom half of the pipe on my original one was uncracked, so I replaced the one from you with a new gasket and switched pipe. it sounds and looks good. Onward to the other side (once I fix a couple of recent new problems. As you know.....it never ends.
Jim Cummings
1983 Model 10
8V71
Auto Trans
Tour Bus Conversion Ex-Senator Coach
http://www.thejimcummingsband.com" onclick="window.open(this.href);return false;
jcb
Posts: 95
Joined: Mon Nov 26, 2012 10:37 am
Bus Model: 1981 Eagle Model 10

Re: 8V71 Upper & Lower Exhaust Pipes

Post by jcb »

btw.........I found every other part including a new Muffler at NAPA for a very reasonable prices. Surprised me!
Jim Cummings
1983 Model 10
8V71
Auto Trans
Tour Bus Conversion Ex-Senator Coach
http://www.thejimcummingsband.com" onclick="window.open(this.href);return false;
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