Manifold Bypass Nipple Removal - JeepForum.com
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post #1 of 13 Old 07-08-2019, 02:19 PM Thread Starter
CJ7Guy1
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Manifold Bypass Nipple Removal

Anybody have any luck removing the Manifold Bypass nipple (manifold side, not Thermostat House side)?


Engine: 1984 CJ-7, I6 (4.2L, 258cid, 4200cc, 1.11 Gallons, 284 US-tsp, etc.)

Thanks,
Patrick

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post #2 of 13 Old 07-09-2019, 10:14 AM
mystert29
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Id try a big pipe wrench and a torch.
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post #3 of 13 Old 07-10-2019, 08:28 AM
baldfatdad
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I'd soak it a day or two in 50/50 acetone and auto trany fluid. Stick a metal dowel down it, to help to not crush it. Soak it in Freeze off and give it a try.
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post #4 of 13 Old 07-10-2019, 08:52 AM Thread Starter
CJ7Guy1
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Quote:
Originally Posted by baldfatdad View Post
I'd soak it a day or two in 50/50 acetone and auto trany fluid. Stick a metal dowel down it, to help to not crush it. Soak it in Freeze off and give it a try.
Hmm, never heard of that procedure - I'll give it a try.

....what about the part with a big wrench.....?

Thanks BaldFatDad (don't be so self-deprecating, after-all, how bald could you really be...?)!

Patrick
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post #5 of 13 Old 07-10-2019, 09:05 AM
John Strenk
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I like the steel rod idea to keep it from crushing.


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post #6 of 13 Old 07-10-2019, 09:07 AM
pedal2themetai
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HI the nipple is screwed into the intake that's why the wrench but a wrench won't do it you need a Pipe wrench to hold the pipe to turn it but yes use a dowel so you don't crush it.
good luck
tim
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post #7 of 13 Old 07-10-2019, 10:41 AM
STJP
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I'm curious as to why it needs to be removed?

JS
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post #8 of 13 Old 07-12-2019, 01:52 AM Thread Starter
CJ7Guy1
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Originally Posted by STJP View Post
I'm curious as to why it needs to be removed?

JS
I don't know, probably a medley of things. Particularly frustrated with life in general right now, work's very hard, can't finish a couple long term project that require focus and creativity, two of my son's turning 21 this month, dating two women and the both dumped me for crazy reasons, the general state of American politics, blah, blah, blah.

Give me a minute and I'll start complaining that I'm white - it's something I'd probably do.

So, what better way to fight minor depression then re-plumb an incredibly bad design of an power plant in a vehicle you love as much as any one of your five sons.

Something like that. Also, I have a Toyota Land Cruisers (ouch, those arrows in the back really hurt guys, stop it...) - not the old ones, the new ones. I've got a Series 200 2011 and it's amazing - so many buttons...

Anyway, if you've spent any time dealing with Asian engine compartment design, you see that anything that must go from point A to point B under the hood is solid tubing. Meaning, if there's any expectation of vibration say in the way a radiator connects via a hose to the engine vs. anything that has no potential to vibrate, it's a solid hose, pipe, tube.

So, this being one of the 3 (or 4?) Mystery Hoses that has ceased to be manufactured, AND it has no vibration, I was thinking I would remove the nipple and replace it with an brass elbow to a hard hose to the thermostat housing - either out of copper or 3/4 hard tubing.

Here's the retro repair job I did because this amazing site and either John or Matt or some other amazing fellow Jeep nerd supplied the part number for the hose that comes pretty close to perfect to the original:

Gates PN: 18763 Coolant Hose - $7 (a/o this posting)

Yes, so, hope that satisfies your curiosity. Sounds kinda lame as I proof read it, but, there it is.

Patrick
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post #9 of 13 Old 07-12-2019, 06:00 PM
STJP
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I had to drink two beers by the time I read your answer.

If things don't work out this OEM part may be helpful.

https://collinsbrosjeep.com/81-90-cj...elbow-fitting/

JS
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post #10 of 13 Old 07-12-2019, 06:21 PM Thread Starter
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Quote:
Originally Posted by STJP View Post
I had to drink two beers by the time I read your answer.

If things don't work out this OEM part may be helpful.

https://collinsbrosjeep.com/81-90-cj...elbow-fitting/

JS
Dude, seriously, that is awesome of you to find and send that to me - obviously, that's exactly what I wanted and didn't even bother thinking it existed - I thought I would 'scrap' it together - elbow-elbow-straight-elbow-hose kinda' thing.

Sorry my answer was long winded. At least the pictures were pretty - right?

Patrick
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post #11 of 13 Old 07-13-2019, 06:04 AM
keith460
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So tell me, what is the source and part number for this hose that is very difficult to find? Not that I don't have the correct one, but it is always a good idea to have a future source for this hose if the need arises. And, I have two of those straight coolant nipples in my parts inventory if you need them.
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Intake Cooling Hose.jpg  
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post #12 of 13 Old 07-13-2019, 11:47 AM
STJP
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Quote:
Originally Posted by keith460 View Post
So tell me, what is the source and part number for this hose that is very difficult to find? Not that I don't have the correct one, but it is always a good idea to have a future source for this hose if the need arises. And, I have two of those straight coolant nipples in my parts inventory if you need them.

Here you go:

https://www.napaonline.com/en/p/NBG1...ordInput=10763

JS
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post #13 of 13 Old 07-13-2019, 03:37 PM Thread Starter
CJ7Guy1
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Gates PN: 18763 Coolant Hose and I updated the original image and added this same info below the image.


El Stupid-O - rookie mistake.

Patrick
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