how to tell if intake plenum is leaking? -
LinkBack Thread Tools
post #1 of 2 Old 11-25-2003, 11:53 AM Thread Starter
Registered User
97grand's Avatar
Join Date: Nov 2003
Location: Northern NJ
Posts: 169
how to tell if intake plenum is leaking?

I don't know how a healthy intake plenum should look inside to tell if it's bad or good. When I look into the plenum from the TB should the leak be obvious - i.e. oil sloshing around inside, or just a subtle film, or should it be totally bone dry?

97 Grand Cherokee LTD 5.2L V8. 130k Black on Black; Gold Trim
Only mod's are a toddler seat and a spilled juice cup! SOLD

'91 Taurus SHO+ - Deep Jewel Green

'05 Grand Caravan SXT Inferno Red

'69 Dodge Charger - Black primer
97grand is offline  
Sponsored Links
post #2 of 2 Old 11-25-2003, 04:20 PM
Registered User
Join Date: Nov 2002
Location: Jefferson State
Posts: 814
All I know is mine had a somewhat oily film inside before I sprayed a can of Combustion Chamber Cleaner through the intake. I haven't looked lately but I will, after my wife drives home from work. There's an easy plenum gasket check outlined in TSB 09-05-00, and all you need is a vacuum/pressure gauge. Here's a link to the TSB

BTW mine was OK, so I guess an oily film is alright...

1995 5.2 ZJ Sold... but still in the family
Stocker is offline  

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.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
intake plenum gasket R&R on 5.9L Nurburgringer ZJ Grand Cherokee Forum 21 08-18-2010 06:38 AM
5.2 Plenum +++ ZJ Grand Cherokee Forum 53 12-04-2009 07:10 AM
Advice on Intake Plenum Gasket J8tnub ZJ Grand Cherokee Forum 3 09-28-2007 08:46 PM
High idle after intake/plenum change. abranz ZJ Grand Cherokee Forum 0 09-22-2007 10:06 PM
4.0L leaking intake manifold ? jeepunlimited ZJ Grand Cherokee Forum 5 09-19-2007 10:41 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome