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Discussion Starter · #1 ·
Recently I've been hearing an intermittent noise that seems to be coming from underneath my Altima that could be from a loose exhaust heat shield. It occurs primarily during acceleration from a stop although I've heard the noise when backing out of my garage when leaving for work in the morning and have occasionally heard the noise when the CVT is in park and I rev the engine.

It's too cold to crawl underneath my car the next few days so I was curious if any other 13 or 14 Altima owners have had a problem like this yet and if so what they did to repair it

My car is over 8 years old and has been driven in SE Michigan 95% of the time, winter included. I will need to do something soon as the noise is getting more frequent. My neighbors won't be pleased to keep hearing this noise at 5:30 in the AM.
 

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Discussion Starter · #3 ·
Thanks Throckmorton but I was looking for a DIY type repair instead of taking it somewhere. I do appreciate the muffler shop idea though. I might just need to do this if the weather is not cooperative. It's supposed to be above freezing here the middle of next week which will allow me the chance to find the noise source. I watched a YouTube video that showed one location where the heat shield gets loose.
loose heat shield on 2014 Nissan Altima - YouTube
 

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Recently I've been hearing an intermittent noise that seems to be coming from underneath my Altima that could be from a loose exhaust heat shield. It occurs primarily during acceleration from a stop although I've heard the noise when backing out of my garage when leaving for work in the morning and have occasionally heard the noise when the CVT is in park and I rev the engine.

It's too cold to crawl underneath my car the next few days so I was curious if any other 13 or 14 Altima owners have had a problem like this yet and if so what they did to repair it

My car is over 8 years old and has been driven in SE Michigan 95% of the time, winter included. I will need to do something soon as the noise is getting more frequent. My neighbors won't be pleased to keep hearing this noise at 5:30 in the AM.
Ok so the simple fix is buy a can undercoating spray. And while under there spray anything else that might rattle. Even flex seal will work.
 

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Discussion Starter · #7 · (Edited)
Okay, I installed two stainless steel hose clamps ($3 for both) yesterday night as the temperature was above 40°F and presto the rattle noise is gone. It's likely that most who live in the rust belt will eventually need to do this because there is only one steel strap keeping the heat shield on and it's not stainless. The strap rusted and broke causing the heat shield to rattle. The strap was still hanging on somehow. I'm hopeful that the stainless steel clamps will last the life of the car - they should.
 
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