Hood Liner
Melting Slicks
Joined: Nov 2016
Posts: 2,306
Likes: 1,582
From: East Metro (Twin Cities) Minnesota
St. Jude Donor '21
I believe it also helps keep the hood cooler from engine heat - over years of keeping the paint cooler it may extend its life. Also, is deadens sound from the engine a bit. I would leave it on unless yours is in nasty shape. You can still get a new one. Just my 2 cents! 
Racer
Joined: Nov 2010
Posts: 260
Likes: 74
From: MN
My liner was looking a bit tacky so I contacted my local dealership. Sure enough he could get one. Said it would need to be prepaid and there would be no returns. When I bought a liner for my C3 it came in a small box and folded. When installed you could see all the creases. I asked the parts guy if this was the case with the C5 liner or if it was torn etc. could I return it then? He replied In a very stern voice "I said no returns!" Customer service at it's finest.
Melting Slicks
Joined: Nov 2016
Posts: 2,306
Likes: 1,582
From: East Metro (Twin Cities) Minnesota
St. Jude Donor '21
My liner was looking a bit tacky so I contacted my local dealership. Sure enough he could get one. Said it would need to be prepaid and there would be no returns. When I bought a liner for my C3 it came in a small box and folded. When installed you could see all the creases. I asked the parts guy if this was the case with the C5 liner or if it was torn etc. could I return it then? He replied In a very stern voice "I said no returns!" Customer service at it's finest.
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Administrator
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From: In a parallel universe. Currently own 2014 Stingray Coupe.
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St. Jude Donor '03 thru '26
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When I had a custom hood on my 2000, I was not able to run a hood liner on the car. Did not cause any problems at all.
Safety Car
Joined: Jan 2019
Posts: 4,308
Likes: 3,455
From: Somewhere, Florida
St. Jude Donor '20-'21-'22-'23-'24
Yeah good point - lots of people do custom paint on their hoods and such, too.
I'd be shocked if anyone ever truly had paint issues from not running a liner.
I'd be shocked if anyone ever truly had paint issues from not running a liner.
Le Mans Master
Joined: Dec 2017
Posts: 5,602
Likes: 3,322
From: Virginia
2021 C5 of the Year Finalist - Modified
St. Jude Donor '21-'22
The underside of my hood (under the hood liner) did not look good. As long as it isn't torn, you can refresh your OEM liner by spraying it with some black Krylon grill paint.
Le Mans Master
Joined: Dec 2017
Posts: 5,602
Likes: 3,322
From: Virginia
2021 C5 of the Year Finalist - Modified
St. Jude Donor '21-'22