258 Exhaust Manifold Issue/Question - JeepForum.com
Search  
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 JeepForum.com > Models > Jeep CJ Forum > 258 Exhaust Manifold Issue/Question

Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineSavvy/Currie Aluminum Control ArmsRockridge 4WD IS Taking Zone Offroad Suspension Lift Kits

Reply
Unread 09-10-2011, 02:53 PM   #1
Accountdiablo
Registered User
1984 CJ7 
 
Join Date: Mar 2011
Location: Auburn, WA
Posts: 13
258 Exhaust Manifold Issue/Question

I have an 84 Cj7 with a 258 4.2, put new fuel pump and fuel lines all the way back to the tank. I just took a trip from Washington to Oregon, while on my way down I hit a rather steep hill, this being its only 2 second long drive. I couldn't make it over 45 mph and about half way up my exhaust manifold, either gasket or manifold itself went. Sounded like a well tuned lawn mower for the new 212 miles.
Right before this trip I found that there was a leak, rather was not tightened at all at the exhaust manifold flange. I tightened this up.
Now here is the issue I bought a fel-pro gasket kit and installed but when I went to realign the manifold it won't line up if I start from one side half the bolts fit if I start from the other side the opposites will fit. I've read about the warping of the manifold and how some people just file the holes a little to fit. These are less then an eight off. And only two bolt holes I would have to file.
I'm about to go pull it back off and check for cracks. The manifold is a little over $200 and would prefer not to have to replace it as soon I'll be doing a swap for my amc 360.
Also is it possible to do a repair on a crack other then tig'ing it.
Please treat me as if I'm on the peanut system. I'm new to Jeeps and my usual reliable source is out of contact at the moment.

Accountdiablo is offline   Reply With Quote Quick reply to this message
Unread 09-10-2011, 10:04 PM   #2
Cutlass327
Web Wheeler
 
Cutlass327's Avatar
1978 CJ5 
 
Join Date: Jan 2009
Location: Beach City, Ohio
Posts: 5,153
If the manifold and the intake are bolted together, than you will have to separate them before bolting it on. I broke mine last month by not separating them. Just use a lot of penetrate and heat to loosen the bolts, or they will break off..
__________________
Rick

1978 CJ5 258/T177/D300, '86 D30/D44 WT axles, 'glass tub windshield frame, and fenders, 31x10.5 BFG A/T, TDK galv'd frame - DD and weekend toy

http://www.jeepforum.com/forum/f8/ri...8-cj5-1223197/
Cutlass327 is offline   Reply With Quote Quick reply to this message
Unread 09-12-2011, 02:46 AM   #3
Accountdiablo
Registered User
1984 CJ7 
 
Join Date: Mar 2011
Location: Auburn, WA
Posts: 13
Did the exhaust/intake manifold gasket. Unfortunately I didn't have this thought until after the fact...

This doesn't sound like an exhaust manifold leak. It sounds like an header blown gasket or worse warped head.

It sounds like a very loud, numbing almost lawn mower.

I'm about to start working on getting the head off. So the question now is what is the likely hood of it being warped verses blown gasket?

Little details, did a compression test and 1-5 were great, number 6 is 40 psi. There is no water in the oil and no oil in the water.

Any help would be appreciated.
Accountdiablo is offline   Reply With Quote Quick reply to this message
Reply

Tags
exhaust , exhaust manifold , exhaust manifold install , manifold

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

Log-in

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


Suggested Threads





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