Boxster heat shields. How important are they?
Discussion
Fitted a home modified exhaust with by-pass flaps to my 03 986S over the week end.
Getting clearance for the heat shields was a pain. I did it but there are some gaps as it didnt go together as well as it originally was.
Should I get some silver alloy tape and seal all the little sections up or is it OK?
Getting clearance for the heat shields was a pain. I did it but there are some gaps as it didnt go together as well as it originally was.
Should I get some silver alloy tape and seal all the little sections up or is it OK?
The exhaust system emits a lot of heat. The engine is in a rather enclosed and poorly ventilated area. That is the downside of a mid-engine car. My best advice would be you should seek to duplicate the factory heat shielding as close as possible.
You want to keep the heat from "cooking" the engine and engine compartment wiring and hoses and any plastic panels or body parts (like the rear bumper cover).
You want to keep the heat from "cooking" the engine and engine compartment wiring and hoses and any plastic panels or body parts (like the rear bumper cover).
Make it good, the heat shields are there for a good reason.
Catalysts light off (exotherm) at about 650degC, so soon after you start up and dive down the road the inside of the catalyst is happily sat there at 650degC. The radiant heat from the insulated catalyst brick is significant. Cane you car for a long time at high speed and/or load and the exhaust will glow cherry red. You need the heat shields, you need then to fit.
Catalysts light off (exotherm) at about 650degC, so soon after you start up and dive down the road the inside of the catalyst is happily sat there at 650degC. The radiant heat from the insulated catalyst brick is significant. Cane you car for a long time at high speed and/or load and the exhaust will glow cherry red. You need the heat shields, you need then to fit.
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