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| Re: Muffler replacement # [message #278244 is a reply to message #278232] |
Sat, 23 May 2015 11:56   |
WCB75
Messages: 42
Registered: May 2015
Location: Tampa,Florida
Karma: 0
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Jim, Thank you
I'll give Jeff a call... Appreciate the help...
George nice I stall and a single.. Beautiful coach...
Maybe I can there some day soon... It's a work in progress for me but I love it...
Thank you both
Bill and Mary Kay Boeyen
76 23' Birchaven 455
Tampa, Florida
[Updated on: Sat, 23 May 2015 12:00] Report message to a moderator |
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| Re: Muffler replacement # [message #278251 is a reply to message #278249] |
Sat, 23 May 2015 16:42 |
WCB75
Messages: 42
Registered: May 2015
Location: Tampa,Florida
Karma: 0
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Wow. Great price..... Thanks for the notice...
Rest of exhaust is in great shape. And being its been living in Az. All its life has very little rust...
Thanks again
Bill and Mary Kay Boeyen
76 23' Birchaven 455
Tampa, Florida
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| Re: Muffler replacement # [message #278252 is a reply to message #278251] |
Sat, 23 May 2015 16:48 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Welcome to the GMC cult or group or...
Lucky living in Tampa area. Two good GMC shops within an easy drive.
Join the GMC Sunshine Statesmen Group, they do extensive rallies through out Central Florida.
Muffler is not anything special. Any good muffler shop, with a large lift can install one easily. I used the same shop that Jim used and had a complete system installed.
GMC = Get More Cash. LOL
Use it and enjoy it.
Tom MS II
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: Muffler replacement # [message #278257 is a reply to message #278226] |
Sat, 23 May 2015 19:13 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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Summit is a good place to get mufflers. The walker mufflers I got from them were more expensive then the 18525's at about $50 each. They were a 3 pass low restriction muffler that used to be called hemi mufflers back in the day they have a dimple on both end plates to allow for the internal u bends.
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: Muffler replacement # [message #278270 is a reply to message #278226] |
Sat, 23 May 2015 22:26 |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
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I double checked my emails. And the walker 18425. Is the one i ordered and installed. Here is my original post when i installed it:
that muffler, walker #18425 did in fact fit. I will not go out and recommend going this route, you can make your own decisions. But for the price, it got my GMC back on the road quickly and cheaply so I can be camping next week in it. If I have to replace a muffler again soon, I can live with that.
http://www.summitracing.com/parts/wlk-18425/overview/
for the record, I have what I would say is factory 2 1/4" exhaust. exhaust manifolds, two mufflers up front, then the Y after the mufflers to the rear.
I believe my current muffler system came from factory.
that part number was a cross reference that came from a different, more expensive walker Part number in the gmcmi parts index.
but for the disclaimer: obviously this has to be a cheap muffler. at least it is too inexpensive not to be. installation for me was a breeze, couple of things that were in my favor that I was aware of with the job, that probably would not be for the next person attempting a muffler replacement. I did remove the pipe between the muffler and exhaust manifold to install. and my flange bolts were replaced last year, so came right out.
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
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| Re: Muffler replacement # [message #278282 is a reply to message #278270] |
Sun, 24 May 2015 08:47 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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IIRC mine, before conversion to 3" & rear muffler, was 2.25" from the engine to the Y and 2.5" from the Y to the rear.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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| Re: Muffler replacement # [message #278287 is a reply to message #278282] |
Sun, 24 May 2015 11:37 |
Dennis S
Messages: 3046
Registered: November 2005
Karma: 2
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The OEM down pipes were 2 1/4 inch, the mufflers in/out we're 2 1/4 and the y pipe expanded to 2 1/2 inch -- then 2 1/2 for the long pipe.
Dennis
Dennis S
73 Painted Desert 230
Memphis TN Metro
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| Re: [GMCnet] Muffler replacement # [message #278343 is a reply to message #278270] |
Mon, 25 May 2015 02:04 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Jon,
I apologize, I was incorrect, turns out that I was laboring under the misconception that the WHOLE system was 2.5. inches. As noted
by yourself and several others the pipes from the exhaust manifolds are 2.25 as is the "Y" pipe ends that connect to the mufflers.
I am spelling all the above out to burn it into core memory so I don't make the same mistake AGAIN! ;-)
I did discover something interesting. I couldn't find the mufflers in the GMCMI Parts Interchange which was because I was looking
under ENGINE. Turns out they are located under the FUEL section. This mimics the Parts Book 78Z.
At first I thought that was really dumb then I thought about it a bit and realize it did make sense, kinda - sorta.
Exhaust is burned fuel.
At any rate thanks for providing the follow up message below, I went back to the GMCMI Parts Interchange (Spring 2014) and found a
bunch of mufflers there including the 18425 (it is listed as a NAPA part).
Regards,
Rob M.
The Pedantic Mechanic
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
-----Original Message-----
From: Jon Roche
I double checked my emails. And the walker 18425. Is the one i ordered and installed. Here is my original post when i installed
it:
that muffler, walker #18425 did in fact fit. I will not go out and recommend going this route, you can make your own decisions. But
for the price, it got my GMC back on the road quickly and cheaply so I can be camping next week in it. If I have to replace a
muffler again soon, I can live with that.
http://www.summitracing.com/parts/wlk-18425/overview/
for the record, I have what I would say is factory 2 1/4" exhaust. exhaust manifolds, two mufflers up front, then the Y after the
mufflers to the rear.
I believe my current muffler system came from factory.
that part number was a cross reference that came from a different, more expensive walker Part number in the gmcmi parts index. but
for the disclaimer: obviously this has to be a cheap muffler. at least it is too inexpensive not to be. installation for me was a
breeze, couple of things that were in my favor that I was aware of with the job, that probably would not be for the next person
attempting a muffler replacement. I did remove the pipe between the muffler and exhaust manifold to install. and my flange bolts
were replaced last year, so came right out.
--
Jon
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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