thermostat causing bad mpgs... - Toyota FJ Cruiser Forum
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#1 (permalink) Old 01-05-2011, 12:25 PM
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thermostat causing bad mpgs...

so i just finished reading about the t-stat causing horrible mpg's... i am on my way to purchase a new one and i need to know if i can get away with buying only the t-stat or do i have to get the t-stat/ neck combo that is $40 more?

marc
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#2 (permalink) Old 01-05-2011, 12:45 PM
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Re: thermostat causing bad mpgs...

ande,
You won't need the housing unless there is something wrong with it, like it's leaking (cracked) or corroded badly. Make sure you find out if the T-stat comes with a new gasket.

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#3 (permalink) Old 01-05-2011, 01:06 PM
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Re: thermostat causing bad mpgs...

You definitely need the housing as the thermostat is molded to it, its plastic. I just did this and even after calling the thermostat manufacturer who said that I could just replace the thermostat once I got it apart they were wrong! I got the complete housing with thermostat and gasket from my local dealer for $43. Waiting to check my mileage but I never got the mileage reported, 300 mpg a tank, anyway.
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#4 (permalink) Old 01-05-2011, 01:55 PM
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Re: thermostat causing bad mpgs...

Quote:
ande3528 previously said: View Post
so i just finished reading about the t-stat causing horrible mpg's... i am on my way to purchase a new one and i need to know if i can get away with buying only the t-stat or do i have to get the t-stat/ neck combo that is $40 more?

marc
I am pretty sure you are referring to the thread that the guy that has the supercharger made.

First off, what MPGs are you getting and what mods do you have.

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#5 (permalink) Old 01-05-2011, 05:06 PM
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Re: thermostat causing bad mpgs...

I see now that it says to install the thermostat WITH inlet housing. Well that makes the decision a lot easier.

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#6 (permalink) Old 01-05-2011, 07:17 PM
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Re: thermostat causing bad mpgs...

are you switching to a lower temp stat, or are these stats known for seizing up?
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#7 (permalink) Old 01-05-2011, 07:41 PM
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Re: thermostat causing bad mpgs...

My dealer raped me for $57.28 for the thermostat (#16031-0P010) and $26.49 for 1 gal of the special pink Toyota coolant mix (#00272-SLLC2).

I tried to order through Lexuspartsdude(Chris), but he doesn't answer his PM's... at least not mine.

Cris
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#8 (permalink) Old 01-05-2011, 07:43 PM
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Re: thermostat causing bad mpgs...

Chris is away and should be back by the end of the month or beginning of the next month.

To OP, can you borrow scan gauge from someone and see if thermostat is the issue? It is a solution for those who has the problem, but maybe you don`t. Just saying

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#9 (permalink) Old 01-05-2011, 07:44 PM
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Re: thermostat causing bad mpgs...

Great. Oh well, I couldn't wait.

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Chris is away and should be back by the end of the month or beginning of the next month.

Cris
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#10 (permalink) Old 01-06-2011, 09:43 PM
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Re: thermostat causing bad mpgs...

Quote:
g0lden previously said: View Post
are you switching to a lower temp stat, or are these stats known for seizing up?
No, stock temp, only one available that I know of. They don't seize up, but they don't maintain a high enough temp. They keep the engine cool and the ECM in enrichment mode leading to poor mpgs.

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