1997 Jeep Cherokee Exhaust Manifold

Tiny
PETER V
  • MEMBER
  • 1997 JEEP CHEROKEE
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 250,000 MILES
I have a 1997 Jeep Grand Cherokee (Limited) and I recently took it in for inspection. The shop said that I have a crack in the exhaust manifold. They said that it would cost $1,100 to repair. I could not afford to make the repair at the time and they said that it would be fine, but would lower my gas mileage. I am a pretty handy guy, and I am wondering how hard it would be to simply replace the exhaust manifold myself. So, first question- how hard would it be to replace myself? And second question- how do I replace the exhaust manifold. I checked it out, and a new manifold would be about $250. Can anyone tell me how to do this? Step by step instruction would be highly preferred, but a general overview would probably suffice. Thank you.
Sunday, November 2nd, 2008 AT 11:33 PM

3 Replies

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
If you don't have much experience in working on vehicles then this can be pretty challenging. There are numerous components that may be attached and in the way of removing the manifold. In a lot of cases, you have to remove the intake manifold as well which will include even more components. There are bolt tightening sequences that must be followed and the nuts and bolts on the manifold are extremely difficult to remove and usually need to be soaked in penetrating oil.

You can try some JB Weld to seal the crack. This is an inexpensive but temporary fix until you can get it repaired by an experienced mechanic.
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Sunday, November 2nd, 2008 AT 11:57 PM
Tiny
PETER V
  • MEMBER
  • 2 POSTS
Thank you for the quick reply!
I realize that there are other components I will have to remove to get to the exhaust manifold.
I would still like to know the step-by-step on how to do it though. I have tools and a basic knowledge of cars. A thorough explanation would be greatly appreciated.
In the meantime I will definitely use the JB Weld idea. Thanks!
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Monday, November 3rd, 2008 AT 12:32 AM
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
The best way to do this if you want to do it on your own is to buy a repair manual for your vehicle. They are not very expensive and you will still save hundreds of dollars in labor costs. However, here are the basic steps of removal. Please note that all makes/models are different so as I said before, there are other components that may need removed in order to gain access for the removal and installation process.

Anytime you work on a vehicle it is a good idea to disconnect the battery and make sure you have the vehicle lifted properly. This job is easier on roll-on ramps but you can also use jack stands.

Removal:
After gaining access to the manfiold, remove the manifold heat shields and the exhaust Y-pipe or support the Y-pipe with a stand. Treat the exhaust manifolds fasteners with penetrating oil and let it sit for several minutes. Loosen the bolts to the exhaust manifold and remove them. Lift out the exhaust manifolds.
Remove the gasket and discard it. Clean the mating surfaces to remove any gasket material, dirt and carbon deposits. Wipe the surfaces with solvent. Examine the surfaces for damage.

Installation:
Position the new gaskets over the cylinder head and then place the exhaust manifolds on them. Start at the center and work out to the ends to tighten the bolts. Torque them to 18 foot pounds.
Replace the exhaust Y-pipe (if removed) and the exhaust manifolds heat shields along with any other components you removed.
Reconnect the battery cable.
Start the engine and allow it to run for several minutes. Check for exhaust leaks.
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Monday, November 3rd, 2008 AT 1:22 AM

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