The CJ3A Page Forum › Willys CJ-3A Technical Knowledge Base › Tech Talk › Thermostat installation?
‹ Previous Topic | Next Topic ›
Page Index Toggle Pages: 1 Print
Normal Topic Thermostat installation? (Read 4633 times)
 
1955CJ-5
Flatfender Master
2013 Sponsor Member
2016 Sponsor Member
2015 Sponsor Member
*****
Offline


It wasn't always green....

Posts: 2338
Location: Boise, idaho
Joined: 12/18/12
Gender: Male
Thermostat installation?
06/14/13 at 01:33:01
Print Post  
I looked in the manual, but couldn't find a good picture....

So, does the thermostat sit on the head, with the spacer inside the housing?

Or, do you put the thermostat in the housing and then push in the spacer?

As it is right now the spacer is thoroughly stuck in the housing and the thermostat was sitting on the head...

Thanks,

Randy
  
1955 CJ-5, A friend for 55 years....1951 CJ-3A, a new addition. 1929 Model A Ford Closed Cab Pickup...
Back to top
 
IP Logged
 
Bob W
Flatfender Master
Owner Member 2012
2016 Sponsor Member
*****
Offline



Posts: 2159
Location: Monticello, NY
Joined: 10/19/10
Gender: Male
Re: Thermostat installation?
Reply #1 - 06/14/13 at 10:25:56
Print Post  
The thermostat goes up into the housing and the spacer goes in next, holding the thermostat up there. If you take a look at an original thermostat you will see why this was necessary. The temperature "sensing" portion was too large to fit in the head.
  
Bob W
Back to top
WWW  
IP Logged
 
Ryan_M
Flatfender Master
Owner Member 2012
2016 Sponsor Member
2015 Sponsor Member
*****
Offline



Posts: 1695
Location: Glenburn, ME
Joined: 12/29/11
Gender: Male
Re: Thermostat installation?
Reply #2 - 06/14/13 at 10:29:54
Print Post  
This should help.
  
engine_head.jpg ( 34 KB | 127 Downloads )
engine_head.jpg
Current:
'49 CJ3A
'51 CJ3A
'42 Willys MB-T
'47 Bantam T3-C
Previous:
'46 2A
'51 3A
'52 3A
'52 M38
'54 3B
East Coast Willys Association
Back to top
WWWFacebook  
IP Logged
 
1955CJ-5
Flatfender Master
2013 Sponsor Member
2016 Sponsor Member
2015 Sponsor Member
*****
Offline


It wasn't always green....

Posts: 2338
Location: Boise, idaho
Joined: 12/18/12
Gender: Male
Re: Thermostat installation?
Reply #3 - 06/14/13 at 13:55:39
Print Post  
Thanks for the help Bob and Ryan, I guess I've never seen an original thermostat...

The modern thermostats are much shorter of course, and the spacer is much taller....so I'm going to have to figure out a way to get that spacer out of the housing....I haven't really tried yet so it might just pull out with a little encouragement...

I've read this somewhere but have forgotten...should I get a 160 degree or 180 degree thermostat?  I think I've seen 180's recommended..
  
1955 CJ-5, A friend for 55 years....1951 CJ-3A, a new addition. 1929 Model A Ford Closed Cab Pickup...
Back to top
 
IP Logged
 
Jesse
3A Guru
****
Offline



Posts: 298
Location: Hopkins
Joined: 11/09/10
Gender: Male
Re: Thermostat installation?
Reply #4 - 06/15/13 at 17:54:26
Print Post  
If you have a heater I would recommend a 180 with 2 or 3 small holes drilled in the base flange. This lets the valve get some hot water to pre heat rather than the engine heating way up and then opening the valve and dropping off.
  
Its a jeep thing, but you would understand if you have ever lost your wallet.
Back to top
 
IP Logged
 
gmcjr
Flatfender Enthusiast
***
Offline


Even a blind hog finds
a acorn every now and
then.

Posts: 168
Location: N. Texas
Joined: 11/13/12
Gender: Male
Re: Thermostat installation?
Reply #5 - 06/15/13 at 19:24:31
Print Post  
Go with the 180 degree thermostat, like Jeese said it would work better with a heater, and also, its better for your oil. The oil gets a little hotter to burn away mositure and such faster. The only reason for a 160 degree thermostat was for the use of old alcohol based antifreezes. The alcohol would boil away at temps higher than 160 degrees. I dont have any holes drilled in mine , but it sounds like it might be a good idea.
« Last Edit: 06/15/13 at 19:26:59 by gmcjr »  
Gary in N. Texas
51 CJ-3A (old Trusty)
52 Ford 8n (ugly duckling)
46Farmall B (old Rusty)
18 Wrangler Jk
Back to top
 
IP Logged
 
1955CJ-5
Flatfender Master
2013 Sponsor Member
2016 Sponsor Member
2015 Sponsor Member
*****
Offline


It wasn't always green....

Posts: 2338
Location: Boise, idaho
Joined: 12/18/12
Gender: Male
Re: Thermostat installation?
Reply #6 - 06/15/13 at 20:17:25
Print Post  
A 180 with holes sounds like the way to go..

The machinist recommended running the engine initially without a thermostat at all, just so the first warm up or two would be at a constant rate and there would be no trapped air bubbles...no anti freeze either at first..just in case there is a leak there wouldn't be quite as big a mess....
  
1955 CJ-5, A friend for 55 years....1951 CJ-3A, a new addition. 1929 Model A Ford Closed Cab Pickup...
Back to top
 
IP Logged
 
1955CJ-5
Flatfender Master
2013 Sponsor Member
2016 Sponsor Member
2015 Sponsor Member
*****
Offline


It wasn't always green....

Posts: 2338
Location: Boise, idaho
Joined: 12/18/12
Gender: Male
Re: Thermostat installation?
Reply #7 - 06/18/13 at 03:04:47
Print Post  
We were able to get the sleeve out of the housing without too much trouble. It appears to be made of brass.

This sleeve was installed with the tapered end towards the head and there is no flange on the opposite end. Is that correct?

The above drawing shows it installed differently....
  
1955 CJ-5, A friend for 55 years....1951 CJ-3A, a new addition. 1929 Model A Ford Closed Cab Pickup...
Back to top
 
IP Logged
 
Page Index Toggle Pages: 1
Print
‹ Previous Topic | Next Topic ›
Bookmarks: Facebook Google Google+ Linked in Twitter Yahoo
 
  « Board Index ‹ Board Top  

The CJ3A Page Forum » Powered by YaBB 2.6.11!
YaBB Forum Software © 2000-2026. All Rights Reserved.

Valid RSS Valid XHTML Valid CSS Powered by Perl Source Forge