Keyav8r Posted January 15, 2013 Share Posted January 15, 2013 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? Link to comment Share on other sites More sharing options...
KYMJ Posted January 15, 2013 Share Posted January 15, 2013 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. Link to comment Share on other sites More sharing options...
flint54 Posted January 16, 2013 Share Posted January 16, 2013 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. Link to comment Share on other sites More sharing options...
Zebvance Posted January 16, 2013 Share Posted January 16, 2013 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. Link to comment Share on other sites More sharing options...
Keyav8r Posted January 17, 2013 Author Share Posted January 17, 2013 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? Link to comment Share on other sites More sharing options...
Comanche County Posted January 17, 2013 Share Posted January 17, 2013 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. Link to comment Share on other sites More sharing options...
Zebvance Posted January 17, 2013 Share Posted January 17, 2013 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/ Link to comment Share on other sites More sharing options...
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