Manifold cracked? - Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on
Old 05-18-2010, 10:51 AM   #1
Join Date: May 2010
Location: Chattanooga, TN
Posts: 9
Manifold cracked?

Okay, I'm convinced I have a crack in my exhaust manifold. When I fire up the Wrangler TJ, cold, it clicks. When I press the gas, the clicking gets quicker. After the engine has heated up, the clicking stops.

Of course, this started a few months ago and now the clicking noise is getting louder (read: more annoying). I cannot find a crack or hole in the manifold on a visual inspection, but I'm positive this is the problem. My question: before I take the leap and buy a new manifold, does anyone have any other suggestions? Does this sound like a manifold problem, or has anyone had a similar experience?

Thanks guys.

04rubiconwrangler is offline   Quote
Old 05-18-2010, 11:10 AM   #2
Join Date: Apr 2010
Location: south ga
Posts: 78
You may be correct, but before I go replacing anything I would find the leak, it could be just a gasket or even just a loose bolt. You don't want to buy and replace parts that are not needed.

alsyj is offline   Quote
Old 05-18-2010, 11:12 AM   #3
greene91's Avatar
Join Date: Oct 2007
Location: Parrish, FL
Posts: 156
I dont know about a "clicking" noise, but I had a crack in my manifold, and it makes your engine sound rough like a diesel engine or something. I am actually in the process of replacing my exhaust manifold, but I am having problems now that I replaced it. (see the thread "Please Help, replaced Exhaust Manifold")

'99 TJ Sport, 4.0L
greene91 is offline   Quote
Old 05-18-2010, 11:35 AM   #4
Join Date: May 2010
Location: Chattanooga, TN
Posts: 9
I'd hate to spend the money on a manifold and have the problem not resolved. I'm trying to locate the leak but the Rubicon manifold has two round protectors where the manifold tubes join together. On my last Wrangler (97), a crack occurred where the Manifold tubes joined together, but my 04 Wrangler has large round protectors that make it impossible to see any crack underneath. Extremely frustrating. Thinks for the advice.

Greene91: Sorry for your difficulty. It's possible you may have a problem with your new manifold if you have installed successfully more than once?
04rubiconwrangler is offline   Quote
Old 05-19-2010, 01:39 AM   #5
zerokoo149's Avatar
Join Date: Apr 2010
Location: Greenood Lake, NY
Posts: 209
Had the same problem when I bought mine. It was just 2 loose bolts. Tightened them up, and I was good to go.
zerokoo149 is offline   Quote
Old 05-19-2010, 11:54 AM   #6
Join Date: Aug 2008
Posts: 2,473
Don't just guess - verify it!

A quick way to locate the leak --
You need a bright pencil beam flashlight, some WD-40 or equiv and a helper.

When it's cold you say it leaks the most. Do it cold.

Dark night or a dark shop - have your helper shoot some of the WD-40 in the intake while running - it'll make it smoke.
The smoke will come out the leak hole. Your flashlight's pencil beam will illuminate the smoke, making it easy to trace it back.

It could be the donut between the header and head pipe or something else.
I even found one where the bung for the O2 sensor wasn't welded on correctly.

Chrysler still hasn't learned to weld properly!

It's no wonder the country is falling apart - stupidity abounds!
rrich is offline   Quote

Thread Tools

Posting Rules
You may not post new threads
You may not 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 Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
My Jeep is a lot quieter now (new exhaust manifold) Storm27m TJ General Discussion Forum 21 06-15-2012 02:32 PM
Cracked Manifold HiTest TJ Tech Forum 15 05-14-2010 12:35 PM
Cracked exhaust manifold? RhcSavage21 TJ Tech Forum 26 04-08-2010 02:58 PM
Cracked Exhaust Manifold triplett104 TJ Tech Forum 5 04-21-2009 09:02 PM
Cracked exhaust manifold pharmacist25 TJ Tech Forum 6 02-11-2006 04:25 PM

Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 07:33 PM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC. is not in any way associated with the Chrysler Motors LLC