Found supplier of new undertray and they offer ones fitted with isothermal mats and without. I suspect the matring is to protect agains heat hitting the tray. Thing is costs more.
Is it necessary?
Isothermal padding for undertray or not
Moderator: RichardW
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Isothermal padding for undertray or not
C'est pas possible!
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There isn't the same heat from a diesel engine as a petrol engine (except around the turbo) so this may not be the real reason. I suspect the padding is there to reduce noise.
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Inside every old person is a young person wondering what the hell happened.
"Trying is the first step towards failure" ~ Homer J Simpson
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