What does bonnet insulation fr ?

[Tweakmax2]

Isn't it harder fr heat to disperse ?

[Xefera]

i think its more for sound insulation purpose

[Gee]

Isn't it harder fr heat to disperse ?

 

The common design is for the air flow from front pass the engine and go below under carriage.

Insulation is to prevent engine heat reaching the hood, and damage the paint in long run, unless dedicated vent(s) is there to allow air flow to escape from the hood side; such as those on sports car where heat generated are immense. Some very old cars allow hot air to escape up the firewall and by the windscreen, causing heat marks, it got to do with the now concept, and even car aerodynamics & fuel consumption.

[Xefera]

interesting, something new learn today

[Warthog]

Bonnet insulation is to reduce heat to bonnet, prevent pre-mature bonnet paintwork damage, and reduce external engine noise.

 

 

 

[Tweakmax2]

But how come need to insulate sound for external ?

[ER-3682]

But how come need to insulate sound for external ?

New Cars need to comform with Euro Noise emission standard.

[Tweakmax2]

anyone tried DIY this before?