Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

 
 Reply to this topicStart new topic
> Muffler blown out, why?
bugsy0
post Jun 29 2011, 08:14 PM
Post #1


Member
**

Group: Members
Posts: 191
Joined: 26-July 06
Member No.: 6,508
Region Association: None
The exhaust had gotten louder over the last couple of drives so I peered underneath and found the muffler blown out:
Attached Image

Here's a close-up.
Attached Image

I realize this is from an internal backfire, but what does this indicate and why did it happen? I never heard a "bang" or "pop" - only noticed a louder exhaust.
Thanks,
Tom
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
messix
post Jun 29 2011, 08:18 PM
Post #2


AKA "CLUTCH KILLER"!
*****

Group: Members
Posts: 6,995
Joined: 14-April 05
From: between shit kickers and pinky lifters/ puget sound wa.north of Seattle south of Canada
Member No.: 3,931
Region Association: Pacific Northwest
bursh?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
SLITS
post Jun 29 2011, 08:20 PM
Post #3


"This Utah shit is HARSH!"
**********

Group: Benefactors
Posts: 13,602
Joined: 22-February 04
From: SoCal Mountains ...
Member No.: 1,696
Region Association: None
Also add that they rust out from the inside, thinning the metal from the condensation formed when the engine is shutoff.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
r_towle
post Jun 29 2011, 08:26 PM
Post #4


Custom Member
***************

Group: Members
Posts: 24,574
Joined: 9-January 03
From: Taxachusetts
Member No.: 124
Region Association: North East States
its a bursch thing....
Go to AutoZone and get a Hush Thrush muffler that is the same length with the same location of the in and out tubes...with tubes the same diameter and cut that one off and the tail pipe...then weld (or clamp) a new muffler in its place.

20 bucks was the last one I bought.

Rich
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
a914dude
post Jun 29 2011, 09:08 PM
Post #5


Wanker
**

Group: Members
Posts: 247
Joined: 18-September 10
From: Saskatoon
Member No.: 12,191
Region Association: Rocky Mountains
They rust on the shelf.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
76-914
post Jun 29 2011, 09:35 PM
Post #6


Repeat Offender & Resident Subaru Antagonist
**********

Group: Members
Posts: 13,500
Joined: 23-January 09
From: Temecula, CA
Member No.: 9,964
Region Association: Southern California
QUOTE(r_towle @ Jun 29 2011, 07:26 PM) *

its a bursch thing....
Go to AutoZone and get a Hush Thrush muffler that is the same length with the same location of the in and out tubes...with tubes the same diameter and cut that one off and the tail pipe...then weld (or clamp) a new muffler in its place.

20 bucks was the last one I bought.

Rich

great tip (so far (IMG:style_emoticons/default/lol-2.gif) ) Rich, i'm bookmarking this one.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
r_towle
post Jun 29 2011, 10:50 PM
Post #7


Custom Member
***************

Group: Members
Posts: 24,574
Joined: 9-January 03
From: Taxachusetts
Member No.: 124
Region Association: North East States
QUOTE(76-914 @ Jun 29 2011, 11:35 PM) *

QUOTE(r_towle @ Jun 29 2011, 07:26 PM) *

its a bursch thing....
Go to AutoZone and get a Hush Thrush muffler that is the same length with the same location of the in and out tubes...with tubes the same diameter and cut that one off and the tail pipe...then weld (or clamp) a new muffler in its place.

20 bucks was the last one I bought.

Rich

great tip (so far (IMG:style_emoticons/default/lol-2.gif) ) Rich, i'm bookmarking this one.

Just wait for it (IMG:style_emoticons/default/biggrin.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
bugsy0
post Jun 29 2011, 11:29 PM
Post #8


Member
**

Group: Members
Posts: 191
Joined: 26-July 06
Member No.: 6,508
Region Association: None
Thanks for the tip, Rich. This muffler doesn't really look all that rusty - the metal is torn and cracked. I can't figure out what caused it. Maybe vibration?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
r_towle
post Jun 29 2011, 11:39 PM
Post #9


Custom Member
***************

Group: Members
Posts: 24,574
Joined: 9-January 03
From: Taxachusetts
Member No.: 124
Region Association: North East States
its a bursch thing.

Rich
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
silver74insocal
post Jun 29 2011, 11:47 PM
Post #10


Senior Member
***

Group: Members
Posts: 736
Joined: 26-November 09
From: rancho cucamonga
Member No.: 11,073
Region Association: Southern California
QUOTE(r_towle @ Jun 29 2011, 10:39 PM) *

its a bursch thing.

Rich

(IMG:style_emoticons/default/agree.gif) i have one that the muffler fell apart internally...just about to weld on a turbo replacement..if you search the word "bursch" you can read endless threads on it (IMG:style_emoticons/default/beerchug.gif) good luck,Dave
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
messix
post Jun 29 2011, 11:50 PM
Post #11


AKA "CLUTCH KILLER"!
*****

Group: Members
Posts: 6,995
Joined: 14-April 05
From: between shit kickers and pinky lifters/ puget sound wa.north of Seattle south of Canada
Member No.: 3,931
Region Association: Pacific Northwest
it looks like the primary pipe being that close to the muffler right there has caused some severe extreme heat cycling and has caused the sheet metal to expand and contract to a greater amount compared to the surrounding metal hence fatiguing that section to the point of failure.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
bugsy0
post Jun 30 2011, 12:26 AM
Post #12


Member
**

Group: Members
Posts: 191
Joined: 26-July 06
Member No.: 6,508
Region Association: None
QUOTE(messix @ Jun 29 2011, 11:50 PM) *

it looks like the primary pipe being that close to the muffler right there has caused some severe extreme heat cycling and has caused the sheet metal to expand and contract to a greater amount compared to the surrounding metal hence fatiguing that section to the point of failure.

That's very plausible. I took a closer look and indeed the muffler proper is/was touching the pipe. The muffler really does not fit well. So it's a bursch thing (IMG:style_emoticons/default/dry.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
messix
post Jun 30 2011, 12:31 AM
Post #13


AKA "CLUTCH KILLER"!
*****

Group: Members
Posts: 6,995
Joined: 14-April 05
From: between shit kickers and pinky lifters/ puget sound wa.north of Seattle south of Canada
Member No.: 3,931
Region Association: Pacific Northwest
QUOTE(bugsy0 @ Jun 29 2011, 11:26 PM) *

QUOTE(messix @ Jun 29 2011, 11:50 PM) *

it looks like the primary pipe being that close to the muffler right there has caused some severe extreme heat cycling and has caused the sheet metal to expand and contract to a greater amount compared to the surrounding metal hence fatiguing that section to the point of failure.

That's very plausible. I took a closer look and indeed the muffler proper is/was touching the pipe. The muffler really does not fit well. So it's a bursch thing (IMG:style_emoticons/default/dry.gif)

it also appears that the muffler is not original to the exhaust system, it looks to be a replacement muffler that does not quite fit properly.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Standard · Switch to: Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 13th May 2024 - 10:45 PM
Invision Power Board v9.1.4 © 2024  IPS, Inc.
All rights reserved 914World.com © since 2002
914World.com is the fastest growing online 914 community!
We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ...