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99 XK 4.0 - Best choice for an exhaust manifold?

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Old Oct 5, 2023 | 04:54 PM
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From: Aldie, VA
Year: 1999
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Engine: 4.0
Default 99 XJ 4.0 - Best choice for an exhaust manifold?

When I redid my wife's 99 XJ exhaust (2016-ish), the exhaust manifold was cracked and I used the standard
Dorman one Dorman one
with the accordian sections to minimize cracking. Well it has developed a hole in the accordian section and needs replaced. I was thinking fo going with the
ATP stainless ATP stainless
(cost isn't an issue, I just don't want to have to replace it again any time soon. Anyone have any recommendations for an exhaust manifold?

Last edited by dzywicki; Oct 5, 2023 at 07:22 PM.
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Old Oct 5, 2023 | 11:02 PM
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From: GA
Year: 1999 classic
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Engine: Golen 4.6
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The Banks has held up for me. I’m using the Banks gasket also.
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Old Oct 6, 2023 | 12:36 AM
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Also be sure to check your engine/trans mounts. Excessive movement will crack headers.
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Old Oct 6, 2023 | 08:08 PM
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From: Aldie, VA
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Good call on the motor mounts. I replaced them ~10 years ago but should check them again. I ended up going with the ATP stainless one.
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Old Oct 8, 2023 | 06:40 PM
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The exhaust manifold came yesterday so decided to do the replacement today. I am also swapping out the steering gear box. This is my wife's jeep and she took it for inspection and it failed for the exhaust and they said "loose steering". I already had a red head steering box on hand so just decided to replace the steering gear box too. I have replaced several steering gear boxes so I can that job done pretty quickly.
I remoevd the intake and exhaust and replaced the steering gear box. But...when I went to put the ATP exhaust manifold on I saw a problem. The last time I did the exhaust manifold I figured out the trick of putting the lower middle manifold bolts partway in and then rest the intake on them to get it aligned. Then, you can get a 9/16" socket on the nuts to snug them up. The problem I see is that the middle rear one is partially blocked by the exhaust itself. The one I had on there (a dorman) gave a straight shot to the nut. How in the heck do you get something on there to tighten it? It is the one circled in red in the picture.


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Old Oct 8, 2023 | 09:14 PM
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Was thinking about tools that might do the job and found
this this
adjustable crows foot wrench on amazon. Might be a winner. Not enthused about having to buy another tool. Seems to be either this or some stubby open end wrenches. What a pain.
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Old Oct 8, 2023 | 11:12 PM
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Remember, you will never see that bolt once the intake is on so you will have to do it by feel or somehow from underneath. I hope you can even get it started with the intake installed
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Old Oct 9, 2023 | 05:03 PM
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Got it all done today. That one bolt was such a pain. The other bottoms took a few minutes to get a socket on them. That partially obscured one too 45 minutes. Tried everything I could think of and then kind of laid over the side and got both hands under the intake. Was able to slide a box end wrench in and get it tightened with 1/8 turns. And when I was putting the fuel rail back, I noticed all of the injectors are swelling and cracked. These are the original injectors so I'd say they had a good run. 257k miles isn't bad. Tub thumper is still going strong.

cracked injectors

shiny new stainless exhaust
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