Vishnu Signature - bumping the driveshaft?
Oct 28, 2005, 09:47 AM
#16
Not that it applies to the initial problem stated in this thread, but people have cited that they have problems with noise from the catalytic converter's heat shield. I have the older "standard exhaust" system and the catalytic converter is too wide such that it is in partial contact with the heat shield. There is simply no way to bend the shield to eliminate contact, thus the only solution was to remove the shield or provide a means of preventing metal on metal contact.
After discussing the problem with Thermo Tec we tried two different solutions. The first solution was a self adhesive material applied to the heat shield. While this initially worked, the adhesive in contact with the heat shield failed after a few months.
The second solution was to wrap the clamp-on material shown below around the metal heat shield. To hold it in place stainless snap-straps were employed. The material is a fiberglass mat, with an aluminum face. This solution has held up with zero issues. Note that the smallest mat (1 ft in length) is just long enough for the "standard exhaust" converter's length.
Note that the melting point of the mat is above the operating temperature of the catalytic converter. That said until the mat is broken in there is some odor for the first week or so.
After discussing the problem with Thermo Tec we tried two different solutions. The first solution was a self adhesive material applied to the heat shield. While this initially worked, the adhesive in contact with the heat shield failed after a few months.
The second solution was to wrap the clamp-on material shown below around the metal heat shield. To hold it in place stainless snap-straps were employed. The material is a fiberglass mat, with an aluminum face. This solution has held up with zero issues. Note that the smallest mat (1 ft in length) is just long enough for the "standard exhaust" converter's length.
Note that the melting point of the mat is above the operating temperature of the catalytic converter. That said until the mat is broken in there is some odor for the first week or so.
Oct 28, 2005, 04:36 PM
#20
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Originally Posted by freedom
Not that it applies to the initial problem stated in this thread, but people have cited that they have problems with noise from the catalytic converter's heat shield. I have the older "standard exhaust" system and the catalytic converter is too wide such that it is in partial contact with the heat shield. There is simply no way to bend the shield to eliminate contact, thus the only solution was to remove the shield or provide a means of preventing metal on metal contact.
After discussing the problem with Thermo Tec we tried two different solutions. The first solution was a self adhesive material applied to the heat shield. While this initially worked, the adhesive in contact with the heat shield failed after a few months.
The second solution was to wrap the clamp-on material shown below around the metal heat shield. To hold it in place stainless snap-straps were employed. The material is a fiberglass mat, with an aluminum face. This solution has held up with zero issues. Note that the smallest mat (1 ft in length) is just long enough for the "standard exhaust" converter's length.
Note that the melting point of the mat is above the operating temperature of the catalytic converter. That said until the mat is broken in there is some odor for the first week or so.
After discussing the problem with Thermo Tec we tried two different solutions. The first solution was a self adhesive material applied to the heat shield. While this initially worked, the adhesive in contact with the heat shield failed after a few months.
The second solution was to wrap the clamp-on material shown below around the metal heat shield. To hold it in place stainless snap-straps were employed. The material is a fiberglass mat, with an aluminum face. This solution has held up with zero issues. Note that the smallest mat (1 ft in length) is just long enough for the "standard exhaust" converter's length.
Note that the melting point of the mat is above the operating temperature of the catalytic converter. That said until the mat is broken in there is some odor for the first week or so.
Oct 28, 2005, 05:02 PM
#21
If you don't mind compromising the galvanize in an area subjected to salt in the winter.
Originally Posted by dubbleugly01
they make these neat little things called self tapping screws that you can "tack" down the heat shield to the body of the car and provide plenty of clearance. Cost about .05$ and takes longer to jack the car up than to fix the problem.
Nov 1, 2005, 05:26 PM
#22
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Originally Posted by freedom
If you don't mind compromising the galvanize in an area subjected to salt in the winter.
The screws I use and all the shops in the area use are plated for corrosion resistance. This is a common practice when securing under car fuel lines, wiring harnessess etc. Or at least in Houston it's common. But we never salt the roads in the winter either.
