Cardboard on underside of a 98 XJ

GScott said:

The cardboard like sheet under the front of the engine.

What is this for? After 150,000 miles, the stuff has turned limp I had to remove it due to flapping and fan clearance. Anyone know what the original reason for this on the XJ? Should I go to the dealer and get a new one?

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RenixPower said:

The general consensus here is get rid of it.

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langer1 said:

I am sure It can cause the problem your having or at the very least Add to it.
That little narrow opening where the air goes in needs all the help you can give it.
With the front down just a little and the shields in place you create a vacuum under the front that helps pull air through the radiator.
With the front up and the shield missing your create high pressure under the front that the fans must overcome.
Get it level or slightly nose down first, make sure you still have the spoiler and the rubber under the radiator.

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rstarch345 said:

Not necessarily so. Here is a quote from this post and that I have found more true than not. http://www.naxja.org/forum/showthread.php?p=844412#post844412

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