There has to be a better kit out there somewhere given how many motors this problem is common in.
I need to do this aswell

 

I emailed this guy a month ago and he is still making these. All you have to get are the gaskets. Much cheaper. http://thespeedfreaks.net/showthread.php?5666-My-New-Plenum-kits-65-bucks!!!

 

He also has a modded plate that has a wedge welded to it so if you mod your kegger by chopping out the divider plater and cut down the runners it takes some of the volume out of the manifold and forces the air twards the intake runners. I'm trying to decide between the basic 1/4" plate/50mm TB and the modded one with a 52mm TB.

 

That person also sales them on eBay.
Just go to eBay and do a search for Jeep Aluminum Plenum Plate
His plates even look a little cleaner.

 

hughe's used to ship them with the good gasket kit. my f1 intake came with the better intake manifold set.

 

how do I no if my plenum is bad and how do I do it and should I do anything else while it apart? thanks

 

most of the times you just spray propane around it and if the idle changes is bad

 

The leak is into the lifter galley, propane should have no effect in determining a plenum gasket leak.

Yep, thats the one I was looking at. I'm not sure if I have the divider in my 5.9 or not, dont remember and the last time I looked down the throttle body was months ago.

I believe the divider was eliminated at the change over to obdii.

 

You can also look down the throttle body with a flashlight, if you have a pool of oil, it's leaking.

I had a '98 Ram RCSB 5.9 I used the Hughes kit on and it never leaked again for the 4 more years I had the truck. I've installed two others for friends and have never heard they had a problem after - although the last one was just two months ago in a Dakota. Noticed a performance gain as soon as I was done and I played golf with him last tuesday and he told me he's getting about 3 MPG better fuel economy since we did the kit...

Here's his manifold after I got the plate on, just before putting it back in the truck:

 

This is how I tested for a intake plenum leak.
Pulled this line and plugged it with my hand over it.

Pulled off the oil filler cap.

Put my other hand over it and checked for positive pressure or vacuum, I had vacuum.
At this point can you see the mistake that I made?
In front of my fingers the PVC line is still hooked up. :shhh: OOPS

Went back and put a plug that first line that hooks to the air filter.
Pulled this PCV line and used one hand to plug this going into the valve cover and my other hand to cover the oil fill hole.
Had a some positive pressure this time (don't let the press build up, it could cause damage) Well what do you know, it's not bad!

Looking down the TB it looks clean, no oil on the bottom, looks like I don't have a intake plenum leak.

I still need to find out why it's loosing a lot oil at times and why the power has dropped.

 

Now look up to the back as far as you can see with the throttle body removed. That's where my oil was.

 

Another way to tell if the plenum is bad: If you can smell burning oil from the exhaust. If you see white/ blue smoke from burning oil, if you are going through a quart of oil every tank of gas....bad plenum.

Hunter

 

would it be a good idea to replace or do anything else while its all disconnected?

 

703 injector swap, thermostat, hoses, gaskets ect.

 

APS kit people! The plate itself is cheaper than Hughes, and comes with a Mopar plenum gasket (the best one out there). If you want the full intake set, it comes with Mopar gaskets and bolts for $139. Hughes is great for some things, but their plenum kit is definitely not a great value.

 

Oi man, the plenum gasket saga! Been there with my old Jeep, and it was quite the journey. Good choice on the Hughes V8 Magnum plenum repair kit with the 1/4" thick aluminum plate. That thing's a beast and should really do the trick for your Niner.
Reminds me of the time I faced a similar ordeal. My old beast was also losing oil faster than I could pour it in and the vacuum issue... oh boy, did it love to whistle its woes. It was during this period of trial and error that I stumbled upon a helpful site during my endless nights of forum diving and part searching. I found myself on klifex.com more than once. They weren't my main go-to initially, but I appreciated how straightforward it was to navigate and find what I needed without getting bombarded by ads or upsells. Gave me a few ideas and helped me understand what I was dealing with a bit better.
Ended up turning the whole fix into a sort of bonding session with my dad. We had parts and tools spread out like a treasure map. There were moments of frustration, sure, but also a lot of laughter and learning. When we finally got everything sealed up and the engine hummed to life without that dreaded sucking sound, it felt like we'd won a major victory. Made all those hours worth it.
Best of luck with your repair chad! It sounds like you've got a solid plan. And who knows, maybe it'll turn into a good story to share down the line, just like mine.

 

oh, old thread, sorry, I noticed after I wrote it, it was a bit of a shame to delete it.