Updated Thermal Control Valve

[GranPrix]

Why don't you guys just do the free mod... ZERO dollars...

 

[Sparksalot]

Thought I would increase our knowledge base by closing this out. I did purchase the 86774933 for my truck. Mounts to the transmission fine, but body of the unit has a slightly different angle where the lines mate with the unit, and it did not want to seal properly. My solution was to swap the new thermostat into the old housing.

I bought this one also, from one of the big online GM sources. I even did the VIN verification. Nope, wrong part for a 15 with quick connect lines. I ended up swapping the guts as well. At least this way if I feel the desire to flip the pill later, it has a fresh spring in it.

 

[GranPrix]

So I just eliminated the spring and pill and I’m still getting 190+. Am I missing something??

 

[Rygrego]

So I just eliminated the spring and pill and I’m still getting 190+. Am I missing something??

You don't delete the spring and pill, you flip the pill.

 

[GranPrix]

You don't delete the spring and pill, you flip the pill.

Whether you just flip it or delete it it doesn’t make a difference. They both allow the fluid to free flow regardless of temperature… Correct??

 

[Sparksalot]

Whether you just flip it or delete it it doesn’t make a difference. They both allow the fluid to free flow regardless of temperature… Correct??

Without the pill, the body short circuits the flow. Nothing will go to the external cooler.

I did see one video where the guy tapped and plugged the port between the inlet and outlet. That way it always flows to the cooler.

 

[Doubeleive]

When I did mine I tapped it and put a screw in it this keeps it open, just taking the pill and spring out is not the complete process as far as I remember

 

[Rygrego]

Whether you just flip it or delete it it doesn’t make a difference. They both allow the fluid to free flow regardless of temperature… Correct??

No, it then allows the fluid to still bypass the cooler. You flip the pill and spring so the valve cannot bypass. Put the stem of the pill in opposite of original position and the spring in the thermostat housing to hold the pill in place. It will then be in cooling mode continually.

 

[GranPrix]

So I put the pill back in and flipped it. Highest it got was 176. Better than the 190 I was getting but still seems a bit high

 

[Sparksalot]

So I put the pill back in and flipped it. Highest it got was 176. Better than the 190 I was getting but still seems a bit high

That’s about where mine has settled with the new tstat guts. It was routinely 198 before.