It's crapping out fiberglass.
Can I assume this is only coming from the rear muffler, or might the front one also be at fault?
If it feels like the car has suddenly lost its punch on the highway, this is my culprit, right?
2006 S60 muffler hair
- kcodyjr
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2006 S60 muffler hair
2012 C70 T5 Platinum, ember black on cranberry leather
2006 S60 2.5T AWD, ice white on oak textile
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2006 S60 2.5T AWD, ice white on oak textile
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- RickHaleParker
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The lost of power if due to back pressure.
The fiberglass could be from the muffler or resonator.
Open the exhaust between the muffler or resonator. If the back pressure goes away it is the muffler. If it does not go away replace both. It would not be a bad idea to replace both as preventive maintenance while you have it apart.
This is one if the things that can trip the Catalytic Converter efficiency DTC other then the Catalytic Converter.
⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
- RickHaleParker
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Resonators are for shaping the sound of the exhaust. ( Alters the frequencies of the sound waves )
Mufflers reduce the volume of the sound. ( Reduces the amplitude of a sound waves )
Neither one has anything to do with environment emissions ... unless you count noise pollution as an environment emission.
Resonate : Produce or be filled with a deep, full, reverberating sound.
Muffle : To wrap or pad with something to dull the sound.
⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙⸙
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD. Yamaha V8 conversion
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
- kcodyjr
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I tend to agree; if there's even a chance it could be the resonator, then on a 15-year-old car with 213K miles it's a question of when, not if, it will fail, if it hasn't already. When it does, it would place a linear obstruction into a hypothetical new muffler, of the same kind that's been known to kill pet felines.RickHaleParker wrote: ↑18 Jun 2021, 07:11 It would not be a bad idea to replace both as preventive maintenance while you have it apart.
Given the cost of the OE muffler and resonator, I'm considering this Mototec kit:
https://www.eurosporttuning.com/mototec ... -s60r.html
Has anyone tried it?
2012 C70 T5 Platinum, ember black on cranberry leather
2006 S60 2.5T AWD, ice white on oak textile
5 others that came and went
2006 S60 2.5T AWD, ice white on oak textile
5 others that came and went
- SuperHerman
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Looks like you got the tail end of too much horse power. Never seen that before.
On my 2001 XC70, years ago, I replaced the resonator with the cheapest thing available on Rock Auto. Worked just fine. My issue was rust.
If your muffler is bad you may want to go looking for a used unit from a wrecker or see if anything is available on Craigslist.
On my 2001 XC70, years ago, I replaced the resonator with the cheapest thing available on Rock Auto. Worked just fine. My issue was rust.
If your muffler is bad you may want to go looking for a used unit from a wrecker or see if anything is available on Craigslist.
- abscate
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I would count the kids….

Empty Nester
A Captain in a Sea of Estrogen
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A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
Link to Maintenance record thread
- oragex
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That looks scary. That totally looks like a wig
Several Volvo Repair Videos https://www.youtube.com/playlist?list=P ... s0FSVSOT_c
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