TRU5hot

iTrader: (1)

So I live in FL and its kinda hot most of the time. I have a scan gauge II that's giving me readings of my engine temp being around 198-210F. I was looking into a aftermarket thermostat that opens up sooner, any advice?

Thanks!

RX8Soldier

iTrader: (24)

mazmart.com

Arca_ex

iTrader: (10)

Why do people think that getting a lower temp thermostat will lower coolant temps? Once they're open they're all the same...

RX8Soldier

iTrader: (24)

I also don't understand why people think 198-210* is bad? After 220*F, then I'd start to worry

Chino_rx3

iTrader: (1)

I've read stock Oem works great in Florida that's what I'm getting soon when I start putting my engine together ,

olddragger

iTrader: (3)

no dont run the oem thermostat--but dont run any other thermostat than mazmarts--it seals the bypass very very well. others dont.
if you want your car to run cooler--you will have to get better control of the fans.

DarkBrew

+1
The lower fan turn on controlled by the Access Port lowers my operating temp significantly.

Without the AP mod installed my temp in 33C weather was hitting 100C with no AC... typical was 95C. Coolant temp was always above oil temp.

With the mod in 33C weather the coolant temp hit 95C Max even with AC on. Typical was 87C. Coolant temp was very close to oil temp.

I will look into the Mazmart Thermostat.

Chino_rx3

iTrader: (1)

Let me know on the thermostat if it makes a difference , my car ran fine with stock , but always looking into improving cooling , im not going to purchase cobb to much money for me,

Sephitrask

I might get flamed a bit for this, but whatever. There is a shop called rx8performance (formerly mazsport) that sells a kit for $100 that turns the fans on at 185. I and several other people that I know in Florida have this mod and it works great. My temps only get into the 190's if I am sitting in traffic, and never break 200.

Chino_rx3

iTrader: (1)

^ is that with stock thermostat ?

HiFlite999

iTrader: (2)

^ yes. I've tried the mazmart thermostat and went back to stock. Also, make sure the basics are covered: undertray intact, radiator edges sealed with foam, etc.

Sephitrask

Yes.

Chino_rx3

iTrader: (1)

Thanks will look into getting this now . I think the OEM thermostat works great and with this mod I think it will work great. And what you mean foam edges ?

olddragger

iTrader: (3)

an earlier opening thermostat will only help if you have the coolant system capacity to keep the engine at that temperature. If you only change the thermostat it will do very little addressing overal temps. NEVER use an aftermarket thermostat unless it is Mazmarts. I have seen some bought in various autopart stores that do not seal the bypass well and that needs total sealing brothers.

Sephitrask

Around the radiator is foam strips that seal up the front of the car, forcing the air coming in through the radiator instead of around it. A lot of people add additional foam to better seal the area.

Shoreguy926

Ok,I've done this in my Jeep before off Roading.. How About removing the Thermostat all together,Atleast for the WARM/HOT months.. What would be the Consequence?

olddragger

iTrader: (3)

sure would---it would kill your engine. You need to do some research brother, before you start messing with your engine. There is a lot of info concerning cooling in this forum--just search

Sephitrask

ok, I am going to explain this before the rest tear you to pieces on it.

How your cooling system works:
coolant stays in engine held there by the thermostat, a spring loaded valve that stays shut until the coolant reaches a certain temperature. Once that temperature is reached, the valve (thermostat) opens, and the water pump pushes the coolant out of the engine into the radiator. This in turn pushes the coolant in the radiator into the engine. Once this cool fluid hits the valve, it closes. While this fresh coolant is being heated in the engine, the hot fluid is in the radiator being cooled. This process happens continuously through operation of the car.

Now lets take out the thermostat.
There is now no valve holding the coolant in the engine till it reaches a certain temperature. Instead, the water pump moves it continuously through the system. It no longer stays in the radiator to cool down, but just keeps flowing. The temps will continue to rise until you overheat.

Shoreguy926

It was just a thought.. I was goin with the fact that as long as your not in stop an go traffic..Fresh air movin through the Rad would keep Temps way lower.. Like when it stuck open in the winter..You never have heat unless your sittin at a light.. Then once u move it drops.. But thanks for not Ripping me..

Sephitrask

This is a big misconception that is done by many people. Just because the car doesnt overheat based on the dash guage doesnt mean it is working right. A good example is the stock temp gauge on the 8. by the time that guage moves past center your screwed.

billjoebob

I hate to start an old thread.

With the reman engine, I think you still have a chance with an overheat. I overheated pretty bad when the radiator busted on my reman. Almost 10k miles later, it's still pretty darn awesome.

Also, it is very bad to not have a thermostat. The car would never reach it's operating temps and run like it is supposed to. Coolant would just keep passing through. We experimented by removing the thermostat and doing a six hour drive through Florida without it. Car never had gotten warm and the ecu wouldn't allow the revs to go all the way up because it didn't get to op temps. Removed the limiters and the car still sucked and no heat, but the temps were a little higher since no rev limit. I'm sure the oil also didn't like it. Put that sucker back in and it was normal. Removing the thermostat will not overheat your engine but it is retarded and is worse for productivity.

stinksause

iTrader: (5)

Get the mazmart one - I was an idiot who got one that didnt fit well cause it opened at 140 and almost overheated at the track cause it didnt open far enough to seal the bypass