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Under hood insulation

Jeepguy03

NAXJA Forum User
Location
Connecticut
I own a 2000 Jeep Cherokee 4.0L. My previous Jeep, a 1990 Cherokee, had an under hood insulation pad while my current one does not. I've also seen other vehicles that have under hood insulation pads. What exactly is the purpose of this insulation? Temp control? Sound deadening? My current jeep does seem to have a bit more noticeable valvetrain noise inside the cab, but that could be anything. Would adding under hood insulation make a difference?
 
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