My exhaust suddenly sounds like a lawn mower
#1
My exhaust suddenly sounds like a lawn mower
2006 with 61k miles. This just happened today, and I did a light Google search. General concensus is an exhaust leak, but I didn't see specific HHR answers. Any ideas about the problem and/or price range of repair?
#2
Flex pipe. Here is one of hundreds of threads on this site available by typing "flex pipe" into the search box (hint: change Threads to All)
https://www.chevyhhr.net/forums/how-...ex-pipe-31536/
https://www.chevyhhr.net/forums/how-...ex-pipe-31536/
#3
Flex pipe. Here is one of hundreds of threads on this site available by typing "flex pipe" into the search box (hint: change Threads to All)
https://www.chevyhhr.net/forums/how-...ex-pipe-31536/
https://www.chevyhhr.net/forums/how-...ex-pipe-31536/
#4
First place to look would probably be the flex pipe. If that's the problem, you can replace the whole downpipe, which includes the flex pipe and catalytic convertor(s), and is a bolt in swap, or you can replace just the flex pipe, like here. https://www.chevyhhr.net/forums/how-...ex-pipe-31536/
#5
If it's not the flex pipe, you'll have to get under the car and try to find the leak. Or maybe the muffler or resonator blew out.
#6
You said "didn't see specific HHR answers". Any other would not be HHR specific. An exhaust leak is an exhaust leak on any car, a cracked flex pipe on an HHR is one of the most posted problems.
Do that search and you will read 20-30 different descriptions of the symptoms.
Do that search and you will read 20-30 different descriptions of the symptoms.
#7
11 years old, I’d change the front pipe, the resonator or middle pipe and the muffler
Three nuts at the exhaust manifold flange and two O2 sensors, the cut the old system off with a Sawzall!
I went with a Walker exhaust but EBay has choices! But get the pipes at the 2 1/4 inch size.
2006 2007 Chevrolet HHR 2.4L Catalytic Converter OBD II with free Gaskets | eBay
Walker Resonator Assembly fits 2006-2008 Chevrolet HHR WALKER | eBay
Exhaust Muffler-Quiet-Flow SS Muffler WALKER 21572 fits 06-11 Chevrolet HHR | eBay
I’ve changed all this on my HHR in the driveway with a jack and two jack stands to support the drivers side.
Three nuts at the exhaust manifold flange and two O2 sensors, the cut the old system off with a Sawzall!
I went with a Walker exhaust but EBay has choices! But get the pipes at the 2 1/4 inch size.
2006 2007 Chevrolet HHR 2.4L Catalytic Converter OBD II with free Gaskets | eBay
Walker Resonator Assembly fits 2006-2008 Chevrolet HHR WALKER | eBay
Exhaust Muffler-Quiet-Flow SS Muffler WALKER 21572 fits 06-11 Chevrolet HHR | eBay
I’ve changed all this on my HHR in the driveway with a jack and two jack stands to support the drivers side.
#8
When my 2006 HHr got loud from the back earelier this year, it was the middle pipe. Where the pipe goes over the axle, GM spot-welded on a heat shield onto the pipe about 3/4" away from the pipe (to get an air space to keep heat away from brake and fuel lines). The 3/4" gap is a perfect place for the winter snow and salt to jam into and rust it out. There was a hole in the pipe right beneath the heat shield. The rest of the pipe was solid. The replacement pipe from Walker doesn't have the heat shield (the fuel and brake lines are wrapped with heat shield foil anyways).
I could mention that any decent engineer would recognize that the heat shield created a snow/salt trap in winter climates, but it doesn't matter, they keep doing it.
Steve
I could mention that any decent engineer would recognize that the heat shield created a snow/salt trap in winter climates, but it doesn't matter, they keep doing it.
Steve
#9
When my 2006 HHr got loud from the back earelier this year, it was the middle pipe. Where the pipe goes over the axle, GM spot-welded on a heat shield onto the pipe about 3/4" away from the pipe (to get an air space to keep heat away from brake and fuel lines). The 3/4" gap is a perfect place for the winter snow and salt to jam into and rust it out. There was a hole in the pipe right beneath the heat shield. The rest of the pipe was solid. The replacement pipe from Walker doesn't have the heat shield (the fuel and brake lines are wrapped with heat shield foil anyways).
I could mention that any decent engineer would recognize that the heat shield created a snow/salt trap in winter climates, but it doesn't matter, they keep doing it.
Steve
I could mention that any decent engineer would recognize that the heat shield created a snow/salt trap in winter climates, but it doesn't matter, they keep doing it.
Steve
#10
When my 2006 HHr got loud from the back earelier this year, it was the middle pipe. Where the pipe goes over the axle, GM spot-welded on a heat shield onto the pipe about 3/4" away from the pipe (to get an air space to keep heat away from brake and fuel lines). The 3/4" gap is a perfect place for the winter snow and salt to jam into and rust it out. There was a hole in the pipe right beneath the heat shield. The rest of the pipe was solid. The replacement pipe from Walker doesn't have the heat shield (the fuel and brake lines are wrapped with heat shield foil anyways).
I could mention that any decent engineer would recognize that the heat shield created a snow/salt trap in winter climates, but it doesn't matter, they keep doing it.
Steve
I could mention that any decent engineer would recognize that the heat shield created a snow/salt trap in winter climates, but it doesn't matter, they keep doing it.
Steve