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  #1  
Old 08-27-2012, 08:54 AM
barlowchiro barlowchiro is offline
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Thermostat Housing ?

Ok, so while I am doing my new raditor, thermostat, etc... I figured why not spend the $10 and replace the thermostat housing. Is this also called a Water Outler??



What are the three holes for? I know one is the bypass hose to the water pump, the threads in the back are for the sensor I am guessing, but what is the little outlet on the front for?

Sorry for dumb questions but not at home and can't run out and look at it!
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  #2  
Old 08-27-2012, 08:58 AM
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Where are you getting this picture from? It's probably just a generic pic.
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  #3  
Old 08-27-2012, 09:02 AM
barlowchiro barlowchiro is offline
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Advance Auto Parts, but Autozone, 4wd.com, and all others have the same picture for that part (different colors). Bjs shows the same part.
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Last edited by barlowchiro : 08-27-2012 at 09:05 AM.
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  #4  
Old 08-27-2012, 09:09 AM
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serehill serehill is offline
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yep

Just plug the hole if you don't have polution equipment. It is a thermal valve for controlling vacum
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  #5  
Old 08-27-2012, 10:16 AM
barlowchiro barlowchiro is offline
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What do you plug it with?

I am planning on removing the air pump, associated hoses, etc...
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  #6  
Old 08-27-2012, 10:24 AM
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austinaubinoe austinaubinoe is offline
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Quote:
Originally Posted by barlowchiro
What do you plug it with?

I am planning on removing the air pump, associated hoses, etc...

None of the holes have to do with the air pump. Vac lines connect to this

The other one is for the U shaped water pump bypass. You need that.


I have a question too, is the OEM housing aluminum or cast iron? Mine is aluminum, but can only find cast replacements. Not hard to make an old one look nice though, as long as its not cracked or too pitted.
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1991 Hunter Green Grand Wagoneer
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SOON: 4350 and cast iron intake

Others:
-1994 Baby Grand
-2000 XJ cherokee on Tons
-1953 REO M35A2 6x6
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Quote:
Originally Posted by rustywagoneers_com
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  #7  
Old 08-27-2012, 10:35 AM
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Quote:
Originally Posted by austinaubinoe
Not hard to make an old one look nice though, as long as its not cracked or too pitted.

I'm not too sure, is this one too pitted to use?



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  #8  
Old 08-27-2012, 10:39 AM
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Quote:
Originally Posted by austinaubinoe
The other one is for the U shaped water pump bypass. You need that.

Daaang. I'm going to have to look into this further. Mine was plugged up when I got it. When I replaced everything, I followed suit and plugged it up...
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  #9  
Old 08-27-2012, 10:41 AM
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austinaubinoe austinaubinoe is offline
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Quote:
Originally Posted by Julep4000
Daaang. I'm going to have to look into this further. Mine was plugged up when I got it. When I replaced everything, I followed suit and plugged it up...

well its a bypass, so im thinking it only becomes critical with something blocks the normal flow of things
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Austin

1991 Hunter Green Grand Wagoneer
5.9 2bbl-727-NP229-TFI-30x9.5 Firestone M/T's-Brush Guard-tire mount
SOON: 4350 and cast iron intake

Others:
-1994 Baby Grand
-2000 XJ cherokee on Tons
-1953 REO M35A2 6x6
-1955 Willys Pickup



Quote:
Originally Posted by rustywagoneers_com
i am not an addict, i can stop anytime.
i dont have a problem, you people have the problem.
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  #10  
Old 08-27-2012, 10:47 AM
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Quote:
Originally Posted by austinaubinoe
well its a bypass, so im thinking it only becomes critical with something blocks the normal flow of things

The more I think about it... There was a bypass hose going from the hole in the front to the water pump. The thing I plugged up was the threaded hole in the back. The picture you posted for the vac lines looks like that thing could get threaded into that hole. Mine being a '72, my guess is that the original thermostat didn't have that hole...
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  #11  
Old 08-27-2012, 10:52 AM
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Wait a minute....

If your old t'stat housing "3rd" hole did not contain a vacuum CTO, then you do not have the vacuum lines connected to it, (since its not there). And if you're not configured correctly and need to pass emissions you may have a problem. And absence of the vacuum lines may also give you drivability problems. Is this waggy new to you (and something the PO did?) or do you not have to pass emissions testing?
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  #12  
Old 08-27-2012, 10:56 AM
barlowchiro barlowchiro is offline
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My original one is aluminum too.

Does that vac thing go into the very rear of the housing?

What goes into the little port just in front of/below the bypass hose?
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  #13  
Old 08-27-2012, 11:10 AM
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Quote:
Originally Posted by barlowchiro
My original one is aluminum too.

Does that vac thing go into the very rear of the housing?

What goes into the little port just in front of/below the bypass hose?

If you look into the hole and see threads, that's where the CTO (vacuum thing) screws in.
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  #14  
Old 08-27-2012, 11:12 AM
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austinaubinoe austinaubinoe is offline
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http://www.ebay.com/itm/Jeep-Grand-W...#ht_842wt_1397

Probably just a 1/4" npt plug.
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Austin

1991 Hunter Green Grand Wagoneer
5.9 2bbl-727-NP229-TFI-30x9.5 Firestone M/T's-Brush Guard-tire mount
SOON: 4350 and cast iron intake

Others:
-1994 Baby Grand
-2000 XJ cherokee on Tons
-1953 REO M35A2 6x6
-1955 Willys Pickup



Quote:
Originally Posted by rustywagoneers_com
i am not an addict, i can stop anytime.
i dont have a problem, you people have the problem.
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  #15  
Old 08-27-2012, 11:24 AM
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mdill mdill is offline
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Should be 3/8 NPT hole, When plugging them I usually use a brass female hex plug, but whatever is handy will pretty much do.

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  #16  
Old 08-27-2012, 11:40 AM
barlowchiro barlowchiro is offline
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Ok, there are 3 holes.

The threaded one in the back is for the CTO, the big one in the middle is for the bypass hose, but what is the little one in the front for?
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  #17  
Old 08-27-2012, 11:41 AM
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austinaubinoe austinaubinoe is offline
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Quote:
Originally Posted by barlowchiro
Ok, there are 3 holes.

The threaded one in the back is for the CTO, the big one in the middle is for the bypass hose, but what is the little one in the front for?

no the big middle one is for the main upper rad hose!
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Austin

1991 Hunter Green Grand Wagoneer
5.9 2bbl-727-NP229-TFI-30x9.5 Firestone M/T's-Brush Guard-tire mount
SOON: 4350 and cast iron intake

Others:
-1994 Baby Grand
-2000 XJ cherokee on Tons
-1953 REO M35A2 6x6
-1955 Willys Pickup



Quote:
Originally Posted by rustywagoneers_com
i am not an addict, i can stop anytime.
i dont have a problem, you people have the problem.
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  #18  
Old 08-27-2012, 11:43 AM
barlowchiro barlowchiro is offline
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That's right, one of the drawbacks to not being there and seeing it.

Got it figured out now!!!

Thanks!!!

By the way where do you get a new CTO vacuum thing?
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  #19  
Old 08-29-2012, 12:07 PM
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There are 4 holes,
1) Little bypass in front
2) Big hole for Upper radiator
3) threaded CTO in back
4) Big hole in bottom for the thermstat.


Quote:
Originally Posted by barlowchiro
Ok, there are 3 holes.

The threaded one in the back is for the CTO, the big one in the middle is for the bypass hose, but what is the little one in the front for?
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Home of ADHD project list

1977 J-10 Honcho 360-T15-D20
1977 Cherokee WT 360-Th400-NP241 true-trac(s)
1979 Cherokee 4 Door 258-T-18-D20
1981 Cherokee Chief WT 360-727-NP208
1972 K20 Suburban 350 SM465 205
And the other stuff that gets driven
----------------------------------------
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  #20  
Old 08-29-2012, 12:31 PM
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serehill serehill is offline
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360 ci 727 with
Comp cams 270 h
NP208
Edlebrock performer intake
Holley 4180
Msd total multi spark.
4" rusty's springs
Member, FSJ Prissy Restoration Association

If you can't make it better why waste your time. No use repeating the orignal mistakes. I'm to old to push it that's why.
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