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Thermostat

Tiny
JC-842
  • MEMBER
  • 2007 DODGE CALIBER
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 142,000 MILES
Okay, my problem is thermostats trying to order my therm. For car listed above SE model. The problem is there's some confusion about where this second thermostat is located and the part number. I'm trying to purchase a new thermostat housing which comes with only one thermostat. Now the photo display of the thermostat housing sent by 2CarPros does not match my vehicle. Mine is also plastic the one sent is metal or aluminum. Please check and verify second therm location.
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Tuesday, July 27th, 2021 AT 7:25 PM

8 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,288 POSTS
The primary thermostat is located on the front of the water plenum in the thermostat housing/coolant inlet. (See pic 1) The secondary thermostat is located in the water pump inlet tube. (See pic 3)

The OEM part numbers are listed below and indicate they are the same part for both applications.

Primary
55111016AB

Secondary
55111016AB

I hope this helps. Let me know if you have other questions.

Take care,

Joe

See pics below.
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Tuesday, July 27th, 2021 AT 9:32 PM
Tiny
JC-842
  • MEMBER
  • 181 POSTS
Thank you just what I needed perfect.
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Tuesday, July 27th, 2021 AT 11:14 PM
Tiny
JC-842
  • MEMBER
  • 181 POSTS
  • 2007 DODGE CALIBER
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 142,000 MILES
I need to know if these thermostats open at different temperatures from each other. In ordering I see the primary showing 170F and the secondary at 203F. Also these part numbers are different than what was sent to me. I'm seeing a part number of 55111017AD-001 your number was 55111016AB. And the numbers between the primary and the secondary are different. But if they open at the same temperature say 170F couldn't I just use two thermostats of the same part number? Thanks. JC
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Wednesday, July 28th, 2021 AT 11:14 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,288 POSTS
Hi JC,

I rechecked the manual, and it shows the same part number, which is wrong. Ugh!

First, if you look at the first pic below, it shows the temperatures for opening that you questioned. Once I determined there was a difference, I went to AutoZone's website and found the two different one for you. (See pic 2). You can use their part numbers and cross them for different brands. Also, I highlighted information on both pics to help you determine which is primary and secondary.

Sorry about the confusion. The manual provided the description of two different ones (pic 1) but when I looked up parts and labor, the parts are listed the same for both.

Let me know if this helps.

Take care,

Joe

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Wednesday, July 28th, 2021 AT 8:54 PM
Tiny
JC-842
  • MEMBER
  • 181 POSTS
Thanks Joe, so glad you caught that. I've been trying to buy my therms. Online to save money but all the confusion it's not worth it so I'm going to AutoZone and use this chart to get the right ones. After reading maybe this explains why my gas mileage is so bad. Joe I just need to clear up one thing. Because when I got this car it leaked coolant so I removed the whole housing and found only one thermostat. Now my question is this:
Where is the primary thermostat located is it inside the plastic inlet housing that the top radiator hose connects to? The housing is crazy the way it's made it has all these compartments and then rubber O ring in the back where it slips over a pipe. And then two heater hoses connect at the back of it. So I've never actually seen two thermostats in this engine.
The first guy that sent a diagram to me it was not the right diagram it was totally different. So I'm looking in the wrong area for the inlet tube. And I knew it all along it should be behind the top radiator hose inlet. Is that correct? Thanks, JC
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Wednesday, July 28th, 2021 AT 10:22 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,288 POSTS
Yes, you are correct. I have no idea who designed this system. It looks like someone got confused and then just kept adding parts.

Just a note for you. When you install the new thermostat, align the air bleed with the location notch on inlet housing. The air bleed (also called a jiggle valve) needs to be in the right position for bleeding the system. If it's not, you will go crazy trying to get air out.

I attached the AutoZone pic below showing the location notch and air bleed.

I hope this helps.

Take care,

Joe

See pic.
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Wednesday, July 28th, 2021 AT 10:41 PM
Tiny
JC-842
  • MEMBER
  • 181 POSTS
Amen to that brother. I think the little part on the therm your referring to should be pointing upward or at the top? I think. But I will study the photos and thanks again. You've been able to clear up a lot of confusion. Thanks you're the best. JC
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Wednesday, July 28th, 2021 AT 10:53 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,288 POSTS
You're welcome. And yes, I believe that points at 12 oclock.

Take care and feel free to come back anytime in the future.

Joe
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Thursday, July 29th, 2021 AT 1:16 PM

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