crack in exhaust manifold, weld?
Thread Starter
Senior Member
Joined: Mar 2011
Posts: 651
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From: Norway
Year: 1993
Model: Grand Cherokee
Engine: 4.0L I6
crack in exhaust manifold, weld?
Hi, i took out the intake and exhaust manifold today, i see a crack in bottom of the exhaust manifold. Is it possible to weld it? What impact would that litle crack have on the engine, mpg? The crack is almost around one of the tube.
CF Veteran
Joined: Feb 2010
Posts: 12,367
Likes: 23
From: Oroville, CA
Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
You could have that welded, and a crack will cause the gas mileage to suffer. The O2 sensor will not read correctly and think the engine is lean, then the injector on time will be longer to make up for a lean condition.
Newbie
Joined: Nov 2010
Posts: 23
Likes: 0
Model: Cherokee
I have the same problem with mine. Being lazy and not wanting to take it off, I bought some of this.
http://www.autozone.com/autozone/acc...ier=30671_0_0_
Not perfect or the right way to do it but if you can get over the crack, its a cheap fixed. Hit it with some sandpaper first.
http://www.autozone.com/autozone/acc...ier=30671_0_0_
Not perfect or the right way to do it but if you can get over the crack, its a cheap fixed. Hit it with some sandpaper first.
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