Are silicone vacuum lines worth the extra cost? -
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Go Back > Models > Jeep Grand Cherokee & Commander Forums > ZJ Grand Cherokee Forum > Are silicone vacuum lines worth the extra cost?

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Unread 01-28-2014, 08:34 AM   #1
Registered User
1997 ZJ 
Join Date: Aug 2012
Location: Nashville, Tennessee
Posts: 192
Are silicone vacuum lines worth the extra cost?

So I'm starting to have issues with the HVAC going to defrost when the cruise control is accelerating up hill and figure it's about time I go ahead and replace every vacuum hose and fitting under the hood.
I like to do a good bit of research before buying anything and tend to not get cheap if it means it will last longer/work better yet I can't find much information on this silicone vacuum line that people with fart cannon equipped cars love so much other than the dark green color option might look good in a Jeep engine bay. Does anyone know if there is anything that makes it better from buying the typical AutoZone stuff? Is it more resistant to collapsing, rubbing, cuts, kinks, heat? Does it last longer?
Also if anyone knows the sizes used under the hood that would help, otherwise I'm going to have to find a tape measure, which could take a very long while in this house...

herqulees is offline   Reply With Quote Quick reply to this message
Unread 01-28-2014, 01:36 PM   #2
Registered User
1994 ZJ 
Join Date: Mar 2013
Location: Sonora, California
Posts: 314
Don't do that.

There is a TSB that has been out since 96 for the 5.2s. If your vent mode changes to defrost while accelerating you need to add a vacuum check valve. Done.
JohnCrabtree is offline   Reply With Quote Quick reply to this message

Vacuum hose

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