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Unread 08-21-2013, 07:12 PM   #1
msprooch
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1995 YJ Wrangler 
 
Join Date: Nov 2009
Location: Kokomo, IN
Posts: 404
Manifold Crack?

Is this a crack that is supposed to be there? My exhaust is very loud.

It is a 2.5 95 but this is an aftermarket manifold.



Thanks!

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Unread 08-21-2013, 07:27 PM   #2
superj
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In the thinner metal? That's a shield and can be cracked. Look for black soot around any joints or where it bolts to something, the soot indicates a leak
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Unread 08-21-2013, 08:49 PM   #3
msprooch
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Not the shielding but the manifold itself but no soot anywhere.
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Unread 08-21-2013, 11:37 PM   #4
bigbossd1030
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1995 YJ Wrangler 
 
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If you can feel any air coming out. Then fix it. I am pretty certain it should be sealed 100%. The crack that is between the two heat shields right? Weld her up.

Sent from my iPhone, probably because I am bored at work.
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Unread 08-22-2013, 12:14 AM   #5
Chase0808
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2001 TJ Wrangler 
 
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I just sprayed starter fluid around my manifold and carburetor checking for seal leaks. Just be careful not to spray into the wrong places. On my yj, which is carbureted, when you spray the starter fluid while it is idling, the idle will increase. That is how you can tell if there is not a proper seal.

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Unread 08-22-2013, 12:18 AM   #6
bigbossd1030
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Quote:
Originally Posted by Chase0808
I just sprayed starter fluid around my manifold and carburetor checking for seal leaks. Just be careful not to spray into the wrong places. On my yj, which is carbureted, when you spray the starter fluid while it is idling, the idle will increase. That is how you can tell if there is not a proper seal.

Sent from my YJ
It's the exhaust, this will not change the engine speed.

Sent from my iPhone, probably because I am bored at work.
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Unread 08-22-2013, 05:52 AM   #7
superj
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but using starter fluid it will make a big flame, ha ha ha. you will know for sure if it leaks, ha ha ha.
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Unread 08-22-2013, 06:54 AM   #8
WDNewman
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Oh no.

Quote:
Originally Posted by superj View Post
but using starter fluid it will make a big flame, ha ha ha. you will know for sure if it leaks, ha ha ha.
Thats right. Don't use starter fluid. Use carb cleaner spray to check for INTAKE manifold leaks. Exhaust leaks you can feel with your hand. DON'T be spraying flammable liquid around hot engines anywhere.
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Unread 08-22-2013, 07:06 AM   #9
EABiker
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1989 YJ Wrangler 
 
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Location: Frederick, MD
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It's cracked, time for a new one! Mine cracked in a similar place:



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Unread 08-22-2013, 08:11 AM   #10
Que89YJ
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1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
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Get a good header and replace it. Check your hanger backets for your exhaust. Usually a missing hanger bracket will cause the ehaust to pivot on the one that is still good and jam the down tube up into the manifold. It is also real common for the exhaust manifold bolts to back out. if you do have to do the manifold pulling the drivers side fender opens up a lot of space and makes it easier to swap. It should only take 1/2 hr to pull it but it wioll save you frustration and aggrivation in getting to the middle ehaust bolts.
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Unread 08-22-2013, 12:51 PM   #11
1ATony
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We carry new ones for the 2.5. Here's a link to them on our website if you would like to check on prices. 1995 Jeep Wrangler Cast Iron Exhaust Manifold for L4 2.5L
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Unread 09-03-2013, 08:53 PM   #12
msprooch
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1995 YJ Wrangler 
 
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I would say it is cracked....hopefully the Napa part lasts until the 2.5 dies
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