Cracked exhaust manifold

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Jan 8, 2012 | 12:02 PM

#16

Programbo

CF Veteran

Joined: Jan 2009

Posts: 1,964

Likes: 6

From: Baltimore, Maryland

Year: 1994 1993

Model: Cherokee

Engine: 4.0

Those things seem sure to crack. I went to the junkyards once looking for a good one for my neices bfs GC and had to look at 7-8 of them before I found one that didn't have a crack in it.

Jan 8, 2012 | 12:11 PM

#17

hankthetank

CF Veteran

Joined: Nov 2011

Posts: 2,322

Likes: 1

From: Edmonton

Year: 1990

Model: Cherokee

Engine: 4.0

They crack because the head stretches as it heats up. Not because they need a flex pipe...the aftermarket manifold above proves this. It's got two bellows, and the flange is split in the middle...

Sep 15, 2016 | 06:50 PM

#18

fireman8042

Newbie

Joined: Sep 2016

Posts: 1

Likes: 0

Year: 2001

Model: Cherokee

Engine: 4.0

The link for the exhaust manifold you got is no longer active. Does anyone know the brand so I can get one that's gonna last for my 2001 XJ?

Sep 16, 2016 | 05:06 AM

#19

Orlo

Seasoned Member

Joined: Nov 2014

Posts: 360

Likes: 5

Model: Cherokee

Quote:

Originally Posted by hankthetank

They crack because the head stretches as it heats up. Not because they need a flex pipe...the aftermarket manifold above proves this. It's got two bellows, and the flange is split in the middle...

That's the first time I've heard a plausible explanation for what appear to be strange placements of those bellows to a rigid mounting point.

Now it all makes sense........