Installing Exhaust Manifold

[Keyav8r]

I'm installing a new exhaust system on my MJ including a new exhaust manifold, pipes, cat and muffler, all stock. Can this be done without disconnecting fuel line to the intake, the vacuum hoses and the throttle linkage? I'm thinking I may be able to slide the intake back a little, support it from above (couple of 2x4s across the fenders and some straps or rope) while removing/replacing the exhaust, and then slide it back in place and bolt on the manifolds with a new gasket.

What's the best way to do this?

[KYMJ]

Been awhile since I've done one. Not sure about ALL vacuum lines, but definately doable without disconnecting the fuel line, I never disconnected it.

[flint54]

Possibly could be done that way, but I found it easiest to just pull the fuel rail (and electrical connectors) off the injectors,

disconnect the linkages and vacuum, and R&R both manifolds together. Leave the fuel lines attached to the rail. Be

careful not to overtorque the two (one in front and one in back) nuts onto the studs.

[Zebvance]

I think that you would spend more time and effort doing that vs just pulling it all off.. I just replaced mine and I can't see how I would have done it with out pulling the intake.

[Keyav8r]

Thanks for the feedback. Probably won't take that much longer to just pull everything off and will provide more working room to clean the gasket surfaces and studs/bolts, etc.

 

I think my manual has the torques for the studs and I believe I remember seeing different values for the outer studs.

 

Did you use Neversieze on the studs/bolts?

[Comanche County]

Remove everything. Label everything. It'll give you a chance to give the intake a good cleaning. Afterward, every time you pop the hood you'll thank yourself.

[Zebvance]

yes I did use never seize. look thought my build thread and I have picture and some info of when I replaced my intake manifold. Also While your there IF your motor mounts are in bad shape I would highly suggest replacing them at the same time.

 

 

My build thread: http://comancheclub.com/topic/34531-1988-you-aint-chancin-unless-your-manchin-mj-build-pic-he/