1998 Jeep Cherokee XJ -- Replacing a Cracked Exhaust Manifold on a Jeep 4.0 Six Cylinder

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Күн бұрын

In this video, we will be replacing the cracked exhaust manifold on my 1998 XJ 4.0 six cylinder. Follow along to see what all is involved in this job.
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Пікірлер: 25

@danieljohnson8437 8 ай бұрын

Knuckle Busters, Thanks for your time.

@ludercoarms 8 ай бұрын

Thank You!!

@jasonmurdoch9936 8 ай бұрын

Great video

@ludercoarms 8 ай бұрын

Glad you enjoyed it, thanks for watching!!

@chipjumper 8 ай бұрын

Wow i ordered a new manifold from the Rock for $104 delivered last night and your vid just came up in my queue. They must be watching...

@ludercoarms 8 ай бұрын

🤣🤣 They are always watching -- LOL!!

@madmacc040 6 ай бұрын

Are you running oem motor/transmission mounts? I suspect worn out mounts were causing my exhaust manifolds and headers to crack. I installed the ironman4x4 motor mounts and poly insert in the trans.mount. its been several years on the motor mounts and 9 months on the tranny mount. No cracked exh.manifold. i hope i havent spoken too soon.

@ludercoarms 6 ай бұрын

My mounts are new, no excessive movement from them. The factory exhaust manifolds are known for cracking, it has to do with the expansion rate of the stainless steel. That's why the replacements have the corrugated expansion sections added in.

@jasonmurdoch9936 8 ай бұрын

I have the same year model Jeep except I have a Grand Cherokee if possible could we get an update on the quality of the new exhaust manifold and how it's holding up thank you

@ludercoarms 8 ай бұрын

I am very happy with the exhaust manifold, has held up great so far, no leaks and it's my daily driver so it has been through alot of heat/cool cycles since I installed it. I see no reason it should not continue that way. The improvements in the design over the factory manifold, especially the expansion joint sections and the way the pipes meet at the collector should really reduce cracking and increase the life of the manifold. If anything changes I will certainly post an update video. Thanks for watching!!

@kjohns236 4 ай бұрын

Thanks for the video. I think that might be gas in those ports from leaking injectors.

@ludercoarms 4 ай бұрын

It was excess fuel, but not from the injectors leaking. The extra fuel was from the massive crack in the exhaust manifold. It lets in outside air, which causes the downstream O2 sensor to read lean, then the computer adds fuel. Replacing the broken manifold actually gave me a noticeable increase in fuel mileage because of it.

@Deadbuck73 3 ай бұрын

Great video! I may have missed it, so I apologize if you said it and I missed it, but where did you get the new manifold? Also how hard were the fasteners to get off from the manifolds?

@ludercoarms 3 ай бұрын

Manifold came from rockauto.com The fasteners were not bad, but I live in the south and so I don't get the bad salt corrosion.

@radulescuu 8 ай бұрын

Hi,nice works!link with manifold bay please,thanks a lot

@ludercoarms 8 ай бұрын

this is where I got the manifold -- www.rockauto.com/en/moreinfo.php?pk=9104516&cc=1315943&pt=5860&jsn=858&_nck=ZExt1ysfqhqWnq%2BEvUNdS3Txyey60IDtnjPWF5UU9J0BWQv7pvqZbh%2BYrdIIoJ2QRIQ0dzB9u%2F%2B%2FmhVsDHsuNVrwTHdL74DXQ9omHwKww9HapUqDqeY1jLgXSG2YAJLxDZLXGSFZq0gwXl9uUta977mMtqxJB2T2QPc%2F%2FfLx%2B8wg1czRxb4LR2YFApv7XbuKcHnFsCMDk9DRio7M31P4vvebcpfukFFVQZnvl%2FVtTXk5%2BwnIPl%2FAqo3yVa5eALYIUAsNe5gFbHGDOAyP6pmolBVLMN68QitSypj%2F3Kt0QGWTaZziExhyMztA%2FH1E1EVp

@radulescuu 8 ай бұрын

@@ludercoarms thanks a lot

@Deadbuck73 3 ай бұрын

Is there noise associated with the crack?

@ludercoarms 3 ай бұрын

There was on mine, but I have seen others where there was no noticeable noise. Even on mine it was not super loud.

@wahairiwahi2458 10 ай бұрын

what the effect if manifold crack?

@ludercoarms 10 ай бұрын

If the manifold is cracked, it allows exhaust to leak out, which causes a few problems. First, if the crack is located near any wiring or hoses, the hot exhaust gases will melt them, and increase under hood temperatures. If the leaking exhaust gases make it inside the cab, it could cause a carbon monoxide issue for the driver or passengers. The problem it was causing me, and where I noticed the most difference, was in fuel mileage. The exhaust manifold is in front of the oxygen sensor. As exhaust is leaking out of the manifold, it causes the oxygen sensor to read a lower than expected amount of fumes, which in turn causes the computer to attempt to compensate for a perceived lean condition by increasing fuel delivery, causing a decrease in fuel mileage.