I'm looking to get a 180 degree thermostat for my 05 hemi. Does anybody know a good one to get and where. I can't seem to find one that fits my truck. Thanks.

 

well i dont know if the hemi stat is any different than my 4.7 stat. but i took the 180 stat from my 97 full size and installed it in my 05 4.7 and it was a dirrect fit. the numbers are for a napa 180 530080 for a auto zone it is gt 755 180 and the stant one is 65358. now these are for the 5.2/5.9/4.7 dont know if they fit the hemi. also the fails safe 180 stat is good but dont have that number.

 

whats the stock? 195?

 

I think stock is 205.

Thinking back to my Chevy days with a carb I know that changing thermostat temps had emissions implications. A lower degree thermostat would hurt your emissions test. Certain gases would burn off in the heads as long as you had a 195 thermostat or more. I don't know if this is relevant to a FI motor though.

 

I'm not so sure I would really want to change to a 180 deg stat for the 5.7. I do know that lean burn engines do require a certain temp and if the engine runs colder than that, it runs richer, often causing carboning in the chambers and catalytic converter.

I would pass the question by a Dodge tech, or someone with some design experience before I changed it, and see if it would actually be beneficial to the engine.

I just find it hard to believe that if the engine would run better or produce more power efficiently with a 180 stat versus the 195 stat, that D/M wouldn't use it. The cost to manufacture is essentially the same. If anything, I would be more inclined to bump up the temp to 200, but then I don't know if the engine would start pinging and the ignition would then retart.

I vote to change to the fail open 195 stat

I looked up the stat section in the FSM and going below 195 is not recommended because it can cause sludge formation. And the FSM stated that the stat is closed below 195, most likely opens at 200.

Hope this helps your decision.

 

i have found the 180 stat on another dodge web site that the guys are using. stant number is 35168 and the mr gasket is 5367. hope this help you guys out

 

2 cents here - but when I changed to 180 t-stat from stock on my supercharged grand prix, not only could I not "feel" ANY difference, but it just triggered random flashes of the check engine light - and when I had the car in for warrantee service for the heads up display, the service guys instantly saw the code for improper temp t-stat and promptly changed back to stock (under warrantee) - for me, I would just trust the engineers who built the awesome hemi that they know what they're doing and not mess with it. I just don't see any benefit, even with the fact that it's really inexpensive.

 

I think one of the reasons that DC does not use lower temp. stats is because of emissions. If the engine does not run at a certain temp then you are passing more unburned fuel through the exhaust. I want to say its "Nox" but that does not sound right. I remember I used a 160° stat in my neon, and with the stock PCM it kept throwing up "low temp" codes. After I installed my AF/X PCM that problem went away. I'm very much considering swapping my stock t-stat from my 2005 ram to a 180. Anyone with one on their hemi ram have any issues?

 

same here

I have a gtp superchagerd l67 180 tstat works well with kr

But with a 05 hemi does a 180tst help with power and mpg?

how about 1 stage colder plugs ?

 

I put a new 180 degreeMr Gasket into my 03 Hemi as part of a complete cooling system PM.
Bear in mind it was a bit cold here in the UK at about 1-5 deg Celcius when I did it.
I found that my truck took an age to heat up..........never going over 1/4 on the temp gauge.
Also, my cab heater wasn't toasty at all. My wife and I must say me as well, could feel the chill and missed the hot heater.
I was also getting between 2-3 MPG worse as the truck was definately running richer, I could smell it.
It was as though it was locked in the "cold start loop" all the time. Eventually, I threw several tstat low temp codes.
I changed out my 180 deg tstat and put backin a stock one.
My cab heater was back to normal, My MPG was better again and the temp was a solid one needle width below 1/2. Also the tuck didn't smell rich anymore.
There didn't appear to be any performance increase between the two tstats except for the stocker getting better MPG and quicker engine heat up times..
Please also bear in mind I ONLY have LPG instaledwitha drop in K&N filter and NGK iridium plugsplus an electriccutout.
So, no real performace upgrades......not even superchips.
For me, the stocker works best but I can see the 180 degree tstat working with a cam change and other high performance mods.
Hope this helps?
Al.