Thermostat

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.

Thank you just what I needed perfect.

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

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

See pics below.

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

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.

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

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