How to check for a cracked header?

[Adamerlock]

I recently got a 95 xj and it may have an exhaust leak, if it does its from the manifold. Ive never heard another xj up close so i have nothing to compare it to. link to what it sounds like https://www.youtube.com/watch?v=Ct8JCe5AuTw

 

[jeep ride]

Video not working for me.

 

[Unclewolverine]

You have a 95 xj, hence 95% chance of cracked header. My 95 has been welded and cracked again twice.

 

[Tim_MN]

The crack is usually visible next to a weld.

Do an image search for Jeep 4.0 cracked exhaust manifold and there are plenty of examples.

 

[Adamerlock]

Video not working for me.

video should be working now https://youtu.be/Ct8JCe5AuTw

 

[RCP Phx]

No, your just hearing green paint. :roflmao:

 

[Adamerlock]

No, your just hearing green paint. :roflmao:

was waiting for a comment like this. maybe when i do the header ill fix the previous owners mistakes https://imgur.com/a/fwK5AU9

 

[Anak]

That is what happened when the P.O. worked on the poor vehicle while drunk and/or stoned. You will probably find all sorts of interesting things as you work on that XJ.

As to the header being cracked, the odds are very good that it is.

The odds are also very good that your motor and trans mounts are shot. Unless you see shiny new motor/trans mounts (highly unlikely, but it has probably once happened to someone) I would strongly recommend you plan to replace those too. The driver side motor mount will be easier to replace while the intake/exhaust are out of the way.

 

[IslanderOffRoad]

You have a 95 xj, hence 95% chance of cracked header. My 95 has been welded and cracked again twice.

Yup. I was gonna say does your XJ Header exist? If so it is likely cracked.

 

[Saudade]

Pour some Seafoam down the TB. It will smoke like crazy and come out any leak.

 

[lawsoncl]

was waiting for a comment like this. maybe when i do the header ill fix the previous owners mistakes https://imgur.com/a/fwK5AU9

WTF? Just went at it with a rattle can spraying randomly under the hood.

X2 on replacing the motor and trans mounts. Exhaust manifold cracks and wiring harness flexing are usually caused by excess engine movement.

 

[Adamerlock]

Guess header isnt cracked because it passed inspection no issues. I will plan mounts and the better header and try seafoam to see if the shop missed a crack