jtm

Greetings All. It's been a couple of months since I posted, but I've been busy. Crate motor is installed along with rebuilt gearbox and transfer case. So, all the under truck work is done (for mow). What I'm trying to figure out now is the EGR plumbing. The rigid steel pipe that connects the EGR valve to exhaust pipe. I have a 1987 intake manifold and a 1996 exhaust. I've welded in a bung in the exhaust, but now the original pipe no longer fits. I'm thinking of getting a stainless bellows and welding the threaded end pieces to the ends of the bellows. That will give enough flexibility. But....the bellows is going to be a bit spendy so thought I'd ask you guys for guidance. Can I just eliminate the whole EGR system....block it off and plug the bung? Is that illegal? Will it mess with the computer? Any cool ideas about connecting the current setup if I need to keep it.

I guess that makes sense....thanks much.

Pete M....Thanks for your help, but I need a little clarification: what is CAD and how do I find links that are "in your signature"? I'm working to get up to speed with all the abreviations and nicknames you guys use. What is a "Dizzy"? Thanks again for your patience.

Thanks everybody for comments and suggestions. My Comanche had 175 K miles so I decided to replace the engine with a crate unit. The trans and transfer case are in the shop for rebuild. I can do all the swap stuff but need to understand the vacuum shifting of the front hubs. And, I need some advice about what to do with the EGR valve on the intake manifold. My replacement engine is a 96 HO for a Grand Cherokee. I think everything will bolt up but the 96 exhaust manifold does not have the threaded port for the hard line that comes from the EGR valve. I can TIG in a port for this but would like to eliminate the EGR from the intake if possible. Any advice ??? On the subject of the front axle hubs; I've heard about what I think is s replacement for the vacuum system. This sounds very attractive to me. If somebody can point me in the right direction I'd surely appreciate it. My apology for my newness both to the Comanche and to the forum business. I am totally unfamiliar with the terminologies and the way things are done. So please don't hesitate to offer guidance/suggestions no matter how elementary they may be to you seasoned veterans. Thanks in advance for your patience and help.

Hi all. I just acquired a pretty good 1987 Comanche. My Jeep is pretty straight, never wrecked, almost no rust. It came factory 4.0 liter in-line six power plant, 4x4 five speed. The first thing to address was an exhaust leak (cracks in the manifold) and a really bad oil leak from the rear main seal. I'm working on those issues but the real head scratcher is the mess of little vacuum lines that run from the tranny up to the engine compartment and then to the front differential. I have some ideas of what's going on but really need to find someone that understands this system and can help me figure out how to proceed. I'd really appreciate any guidance you can offer.