[mjsaville]

Originally Posted by XutvJet

My M235 came with the insulation. I removed it and noticed fractionally more engine noise when the windows are down. The insulation cover weighs less than a pound.

Does the hood surface get hotter now there is no insulation? And, is the area immediately above the engine warm to touch after spirited driving?

Thanks MJ

[XutvJet]

Originally Posted by mjsaville

Does the hood surface get hotter now there is no insulation? And, is the area immediately above the engine warm to touch after spirited driving?

Thanks MJ

Nothing measurable by the touch of the hand.

[gops]

Those pads are used for NVH. BMW must have wanted more sound from the bay so Didn't use it at all. It's not actually heat resistance it's used for.

[M3 Adjuster]

Originally Posted by gops

Those pads are used for NVH. BMW must have wanted more sound from the bay so Didn't use it at all. It's not actually heat resistance it's used for.

Not for decades now. Back in the days of carburetors however ...

[David1]

Originally Posted by XutvJet

Nothing measurable by the touch of the hand.

When I added it to my 335 that dis not have it it made a huge temperature difference on the surface of the hood. But, that car does not have the huge space above it that the 2 series hood has, but it will keep some heat away from the surface. I never noticed any sound difference. I will probably add the insulator pad to my M2.