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Muffler heat shield

Discussion in 'Technical Chat' started by Labbi85, Feb 18, 2019.

  1. Feb 18, 2019 at 7:42 PM
    #1
    Labbi85

    Labbi85 [OP] Well-Known Member

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    Hey forum,

    On my truck I have a Magnaflow muffler which is quite wide and close to the frame and I think that the heat from it helps the rust to grow faster. Close by I found a rust bubble which I was able to remove and over paint.
    Now my idea was to put some wrap heat shield around the muffler similar to this one

    https://www.summitracing.com/parts/the-16500/

    My question is now how good this will help to keep the heat away from the frame and where the heat will go when I basically trap it inside the muffler?
     
  2. Feb 18, 2019 at 7:45 PM
    #2
    Labbi85

    Labbi85 [OP] Well-Known Member

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    Here is a picture about the small gap between the muffler and frame.20190217_172346.jpg
     
  3. Feb 18, 2019 at 8:13 PM
    #3
    6 gearT444E

    6 gearT444E CEO & CFO @BPF

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    Herculiner Hootus
    doubt that's causing the frame to rust any faster, by the time the exhaust gasses get to the muffler there is not too much heat that would be causing the paint or powder coat to bubble up. what I'd do is take a thermography camera or IR gun and shoot it to confirm your suspicion first before spending money on the heat shield. To answer your question where the heat would go, the muffler would be hotter inside so the exhaust gasses would exit the tailpipe at a higher temperature.
     
  4. Feb 25, 2019 at 5:02 PM
    #4
    wags

    wags Well-Known Member

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    Walleye Capital of the World, Ohio
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    2012 2.7L 5-Speed Manual SR5 4x4
    Yesterday my exhaust heat shield (above catalytic converter area) fell off when I pulled out of work parking lot. Was having high winds of 60mph gusts. Been hearing something rattling lately until this happened. The heat shield closest to muffler was also loose and ready to tear off to. Bought some 1/4 x 1 1/4 SS washers and and that seemed to work for that shield. Secured it much better with the large washers.

    The shield that fell off will be a little more of a problem since the stud & nut (3 total) farthest forward above catalytic converter I can't budge loose? Plus can't get a socket on i.e. 10mm. Could only use box end wrench. The other two rearward nuts came off with no effort after spraying with penetrating oil. Will buy some more washers and another nut and that should suffice, I hope.

    Toyota dropped the ball in my opinion with these flimsy heat shields. Junk......
     
  5. Feb 27, 2019 at 12:11 AM
    #5
    Wyoming09

    Wyoming09 Well-Known Member

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    New Tripoli Pa
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    Super Springs
    My heat shields were long gone when I bought the truck
     
  6. Mar 10, 2019 at 12:57 AM
    #6
    s.e.charles

    s.e.charles Well-Known Member

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