Strange Thermostat Behavior |
Post Reply |
Author | |
John Cotner
Member Joined: 11 Sep. 2014 Location: New Ulm, MN Status: Offline Points: 355 |
Post Options
Thanks(0)
Posted: 03 June 2018 at 11:16am |
When I start the Willys after sitting overnight, the thermostat runs up to about 215 degrees, then after the thermostat opens up the temp gauge drops and it runs consistently between 160 and 170 degrees for the rest of the day. It did this on the old thermostat as well as the new one. It sits at 215 degrees for only a moment but this seems pretty hot for the motor. Any ideas on why this happens and how to fix it?
|
|
Thanks,
John Cotner New Ulm, Minnesota |
|
JohnB
Member Sponsor Member Joined: 01 June 2014 Location: Saint Louis, MO Status: Offline Points: 393 |
Post Options
Thanks(0)
|
Do you have the 1/8" relief hole drilled in the base of the thermostat? Could you have the thermostat installed backwards?
|
|
shadow
Member Joined: 08 Nov. 2015 Location: Maple Ridge B.C Status: Offline Points: 626 |
Post Options
Thanks(0)
|
yes sounds like its in backwards or its sticky but if your previous thermostat did the same thing i would suspect backwards
|
|
lets go for a rip eh bud
Andy |
|
John Cotner
Member Joined: 11 Sep. 2014 Location: New Ulm, MN Status: Offline Points: 355 |
Post Options
Thanks(0)
|
It does have the relief hole. I'll check on orientation later today.
|
|
Thanks,
John Cotner New Ulm, Minnesota |
|
John Cotner
Member Joined: 11 Sep. 2014 Location: New Ulm, MN Status: Offline Points: 355 |
Post Options
Thanks(0)
|
Checked out the thermostat and it is installed pointy side up, flat side (with temp rating on brass plunger) pointing down. However I did not see the 1/8" relief hole in the base. Whereabouts should it be located?
|
|
Thanks,
John Cotner New Ulm, Minnesota |
|
Rus Curtis
Member Joined: 25 Mar. 2010 Location: Alabama Status: Offline Points: 1733 |
Post Options
Thanks(0)
|
If you've got the housing open and have access to the thermostat, it may be a good idea to test the opening temp to see if its sticking.
|
|
Rus Curtis
Alabama 1954 CJ3B Bantam T3-C |
|
John Cotner
Member Joined: 11 Sep. 2014 Location: New Ulm, MN Status: Offline Points: 355 |
Post Options
Thanks(0)
|
Thanks. I'll check the opening temp later. I was looking at some thermostat photos and noticed that some have the base of the thermostat on top of the metal sleeve inside the cast housing. My thermostat base was sitting on the block. But I also saw some photos with the thermostat the way I had it installed. Which is correct?
|
|
Thanks,
John Cotner New Ulm, Minnesota |
|
John Cotner
Member Joined: 11 Sep. 2014 Location: New Ulm, MN Status: Offline Points: 355 |
Post Options
Thanks(0)
|
Tested the thermostat and it began to open at 170 degrees, fully open at 190 degrees. Seems high for a 160 degree thermostat.
|
|
Thanks,
John Cotner New Ulm, Minnesota |
|
JeepSaffer
Member Joined: 26 Sep. 2014 Location: South Africa Status: Offline Points: 1181 |
Post Options
Thanks(0)
|
John, it sounds like you have it upside down. So the temperature sensing part of the thermostat would be above the opening valve, and therefore isolated from the hot water. This would cause the water to get way too hot before the valve opens.
Turn it other way round and you should be good. The brass flange with the flap valve in it should be at the top, with the retainer underneath, holding the assembly up in position.
|
|
1948 CJ2A #204853 in South Africa
|
|
John Cotner
Member Joined: 11 Sep. 2014 Location: New Ulm, MN Status: Offline Points: 355 |
Post Options
Thanks(0)
|
Just to be clear, the thermostat sits on top of the metal sleeve inside the cast iron cover. The brass plunger with the temperature stamped into it should be pointed toward the block.
|
|
Thanks,
John Cotner New Ulm, Minnesota |
|
Post Reply | |
Tweet |
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |