Hello all,
New to the forums and to working on trucks in general so forgive my overall ignorance of most things.
I've been troubleshooting a surging idle issue and went ahead and tried a suggestion from a youtube video:


However the previous owner had just been using regular old tap water as coolant and the threaded barb that is attached near the thermostat and connects to the IACV bypass hose had some corroded threads that chunked off the bottom. I would like to order a new one of these little threaded hose barb things but I can't find a part number or a diagram that even includes it.
Anyone know a part number or even what it is called?


what's that part called? part # anyone?

Also as a secondary question: some of the thread chunks sunk down and out of sight, I tried to vacuum it out/ fish it out without luck. any way I could flush that out?


IACV coolant bypass port, stuck threads and bits that sunk down out of sight. How do I get those bits out?

 

I don't know the part number for that hoe barb, or even if you get it separately from the part it came from.

Having said that, a possible solution to digging out the bits that fell inside is to get a magnet on a extendable handle, similar to a pointer for use in meetings. You can usually get things like that in auto parts stores, frequently in a "Specials! Under $1.00" bin, know what I mean? I've got 3 or 4 of them. Darn handy, 'cause I have fat fingers and drop parts all the time. A lot easier to stick a magnet down into a tight spot and fish out what I dropped than my big fat paws. Whenever I work on my trucks, I stick one or two onto the underside of the hood. When, not if, I drop something, I can just reach up and grab one.
Or just get a small, rare earth bar or tube sort of magnet, drill a small hole in one end, and thread a string through it, so you can retrieve it. Harbour Freight usually has things like that, or you can google them. They're everywhere, and even rare earth magnets aren't that expensive any more. Usually for school projects and stuff like that.
Push it down into where the barb was, stir it around a bit, and pull it out. It WILL stick to sides, but if it get's close enough, even rusty bits should still have enough ferrous metal left in them for it to grab. Just be careful pulling it back out, so that you don't scrape them off on the sides.

Hope this is some small help...
Pat☺

 

Looks like 17129A is part# 90404-51319, but not 100% positive since I also see that 90404-51060 is listed as the only "union" on the manifold.

EDIT: 90404-51060 is the correct part #



EDIT: 90404-51319 is not the one you need, notice the differences from your pic to this:

 

Thanks Paul22re!

I think you pinpointed that part!
I'll double check but it certainly looks like it fits the bill.
Saved me a lot of searching.

 

Thanks 2ToyGuy
I went ahead and picked up a magnet.
Hope it helps me fish some of those chunks out.
I appreciate the suggestion!

 

Definitely double check, your union does look a bit different than the one in the pic I found. The one in my pic may be much smaller & made for a vacuum hose?

 

I just came across the below thread and confirmed the part # you need is indeed 90404-51060:

https://www.yotatech.com/forums/f116...e-part-276907/

 

Thank you Paul22RE,

Yes back when I ordered the parts I just went ahead and got both of them and indeed 90404-51060 is the correct union.
Also good news, I cleared out all the old threads with magnet and vacuum, screwed the new union in there and did a complete flush of the coolant system.
Not only did it fix my surging idle issue but another high vibrating idle issue that had been bothering me for a bit.

Thanks for all the help!