Vacuum Leak -
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back > Models > Jeep Grand Cherokee & Commander Forums > WJ Grand Cherokee Forum > Vacuum Leak

The Cure for your Tie Rod Roll!Steering and more from Ruffstuff!Introducing MONSTALINER™ UV Permanent DIY Roll On Bed Line

Unread 06-24-2013, 09:05 PM   #1
Registered User
2003 WJ 
Join Date: Jan 2011
Location: Ephraim, New Jersey
Posts: 35
Vacuum Leak

So since I bought this jeep I've noticed it sometimes takes a minute for the AC to switch from defrost to the vents... At first I looked for vacuum leaks and found nothing, so I chalked it up to the blend doors that had just been replaced, figuring they were cheap doors or what not. So today, as I was replacing my radiator fan control relay I heard what sounded like a vacuum leak coming from behind the headlight. I know there is a vacuum reservoir that sits under the headlight and it doesn't seem to have any cracks, but a plugged hole that appears to be from a previous relay replacement, but the whole is solid and not leaking anything. It seems, though, that there is a leak from behind the reservoir. Any one know how to go about getting back behind there? Do I need to remove the battery and the battery compartment? Any ideas? The AC works good and cold, but seems it doesn't blow at full capacity and I'm thinking it's due to that leak, wherever it is coming from.

Cawagula is offline   Reply With Quote Quick reply to this message

Quick Reply

Register Now

In order to be able to post messages on the forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools

Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. is not in any way associated with Jeep or the Chrysler Corp.