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Old 02-09-2015, 09:04 AM
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84 4.2L question... where does this hose go?

Hi all,

I'm about to pick up an 84 CJ with a 4.2L. I wished I snapped a picture of the motor but I grabbed this one from wikipedia and highlighted the hose that's missing.

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The motor has an after market carb on it (as well as headers) so maybe it's disconnected because it's not needed? is there some legitimate reason why the PO would have it disconnected?

Thanks

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Old 02-09-2015, 11:36 PM   #2
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It should be connected to the air cleaner or to the carb some where. Nothing to be worried over. Good luck on the jeep.

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Old 02-10-2015, 09:31 AM
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Originally Posted by Cj5carlton View Post
It should be connected to the air cleaner or to the carb some where. Nothing to be worried over. Good luck on the jeep.
thank you. i figured it wasn't a deal breaker but thought i'd ask the experts
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Old 02-10-2015, 04:40 PM   #4
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No prob
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Old 02-14-2015, 01:34 PM
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I have a follow up question which may seem silly. what kind of hose would I buy for the replacement? do I need something special? I found where it connects to on the carb but I don't know the type of hose I need to pick up. thanks
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Old 02-14-2015, 05:09 PM   #6
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You can use heater hose or vacuum hose nothing special.
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Old 02-17-2015, 11:46 AM
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You can use heater hose or vacuum hose nothing special.
Awesome. I figured but just wanted to make sure. After digging a little more in depth I'm not certain where I thought it should be connected is the right place. I took pictures and will post them shortly. I just want to be sure I don't screw this thing up. My experience has primarily been with fuel injection unless it's on a lawn mower I need to hook it up somewhere though cause it wreaks of fumes with this hose disconnected.
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Old 02-17-2015, 04:05 PM   #8
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Ok yeah mine hooks up to my intake manifold but my jeep is also a 74 cj 5 with the 232 inline 6 but yeah as long as there's as what ever you hook it up to has vacuum to that line you should be fine you might be able to T into another line
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Old 02-25-2015, 04:08 PM
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Here's the pics of the actual motor. As you can see, the breather housing is questionable. Seems like if I replace that with a more stock version that should have a connector for the vacuum line I need. There is this T, however, and I'm wondering if I can just stick it there...

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Here's a close up of the carb:

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Old 02-25-2015, 05:38 PM   #10
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Looks like PCV connection.
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91 YJ 4.0-HO/5sp
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Old 02-26-2015, 10:44 AM
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Looks like PCV connection.
yes, it is. i just don't know where to connect it to.
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Old 02-26-2015, 06:59 PM   #12
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Since your air cleaner doesn't have a place to connect that hose to, you can just put a small air cleaner filter on that elbow. I've got a similar setup on my '81, and it works fine.

The idea is that clean air enters the crankcase through the elbow in the back (from the air cleaner), and gets sucked through to the other end of the valve cover, where it gets pulled back out through the pcv valve. If you can't hook it up to the regular air filter, a small one (ten bucks from O'reilly's) attached directly works just as well.

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