My stock radiator has been cracking at the plastic top so im gonna toss it and get a full aluminum one. I figure i should change the thermostat as well and i was wondering what you guys suggest i go with.
elsyd
When I change mine I will go for this. :: Crucial Racing Systems - The parts you need for the performance you want
Well basically any thermostat will stay open if the car is overheating, they are designed to open up when the car is hotter than whatever the temp rating of the thermostat is. A thermostat will usually fail when it doesn't open and it will be stuck shut. Locking into an open position when overheating doesn't prevent overheating at all unless the thermostat is the cause of overheating. As for the warranty, most thermostats you get from an auto parts store offer a warranty. If it fails you get a new one. And you can get them 10 degrees cooler if you want.
Actually they say it will lock open when an overheating condition occurs, which would mean the car is all ready over heating. It does not say they will not stick closed which is what happens when a thermostat fails. When a car if first started the thermostat is closed until it reaches the temperature of the thermostat. If a thermostat sticks, then it will not open. If this thermostat sticks it will not open either. It cannot lock open if it never opens.
Coolsafe 160* Thermostat
Subaru's turbocharged vehicles place a lot of stress on the cars' coolant sytems. Not only does the coolant have to do the normal job of keeping the engine itself at proper operating temperature, but Subaru has given it the additional duties of cooling the turbocharger and the engine oil! Cooler coolant plays a huge role in the safety and performance of your Subaru on multiple levels.
The Crucial Racing Systems Coolsafe 160 degree thermostat forces your cooling system to react quickly to manage and reduce coolant temperature overshoot under high loads - which is critical to protecting your engine from heat-induced detonation. Before-and-after data logging on a very hot California afternoon showed max coolant temps under full throttle load of 195* F pre-thermostat, and 174* F after the install of the Coolsafe thermostat. Ignition timing is affected by coolant temps, as is the car's oil temperature. The simple addition of a Crucial thermostat will increase power output, especially on a hot day where you will notice less of a performance loss due to the outdoor temperature.
A high performance radiator will lower the coolant temperature at the exit of the radiator as it is a larger heat sink and can dissipate more heat. The stock thermostat, which opens at 172 degrees, is located at the entry of the engine block immediately after the coolant exits the radiator. When installing a more efficient radiator before the stock thermostat, the stock thermostat is actually slower to open than normal because the coolant passing through the bleed hole is colder than normal. If you suddenly go to high boost, the thermostat will not react until the coolant flow and temperatures get high enough at the radiator discharge to open the thermostat allowing for significant coolant flow. As Subaru engine coolant temperature sensors are located on the top of the engine block, coolant temperature is measured as it leaves the engine, not at the thermostat, so coolant exiting the engine under high load could be 40 - 60 degrees warmer than the 172 degree stock thermostat temperature and heat-induced detonation can occur. When your engine management system senses detonation, ignition timing is retarded and your engine loses power.
However, the benefit of installing a Crucial Racing Systems Coolsafe Thermostat is definitely not limited to cars with high performance radiators! Subarus with stock radiators will see the same benefit of lower coolant temperatures, lower oil temperatures (high oil temps are a common problem among cars that see occasional track use), less coolant temp overrun, increased detonation protection, and more power.
SAFETY: Under normal conditions, the Coolsafe Thermostat will operate like any other thermostat. But, unlike standard thermostats, our Coolsafe thermostat automatically locks into an open position should an overheating or failure condition occur, protecting the engine from serious damage. Any normal thermostat will lock in the closed position; a sure way to serious engine failure! Although a thermostat cannot completely prevent cooling system failure, it can greatly improve operating reliability in emergency situations. It is a wonderful safety feature for your Subaru, and the added performance is a welcome plus.
!!!!!
i have one on my 05 wrx and i saw its average water temp drop 8 degrees. This thermostat works backwards in a way thats why it has a fail safe
Subaru's turbocharged vehicles place a lot of stress on the cars' coolant sytems. Not only does the coolant have to do the normal job of keeping the engine itself at proper operating temperature, but Subaru has given it the additional duties of cooling the turbocharger and the engine oil! Cooler coolant plays a huge role in the safety and performance of your Subaru on multiple levels.
The Crucial Racing Systems Coolsafe 160 degree thermostat forces your cooling system to react quickly to manage and reduce coolant temperature overshoot under high loads - which is critical to protecting your engine from heat-induced detonation. Before-and-after data logging on a very hot California afternoon showed max coolant temps under full throttle load of 195* F pre-thermostat, and 174* F after the install of the Coolsafe thermostat. Ignition timing is affected by coolant temps, as is the car's oil temperature. The simple addition of a Crucial thermostat will increase power output, especially on a hot day where you will notice less of a performance loss due to the outdoor temperature.
A high performance radiator will lower the coolant temperature at the exit of the radiator as it is a larger heat sink and can dissipate more heat. The stock thermostat, which opens at 172 degrees, is located at the entry of the engine block immediately after the coolant exits the radiator. When installing a more efficient radiator before the stock thermostat, the stock thermostat is actually slower to open than normal because the coolant passing through the bleed hole is colder than normal. If you suddenly go to high boost, the thermostat will not react until the coolant flow and temperatures get high enough at the radiator discharge to open the thermostat allowing for significant coolant flow. As Subaru engine coolant temperature sensors are located on the top of the engine block, coolant temperature is measured as it leaves the engine, not at the thermostat, so coolant exiting the engine under high load could be 40 - 60 degrees warmer than the 172 degree stock thermostat temperature and heat-induced detonation can occur. When your engine management system senses detonation, ignition timing is retarded and your engine loses power.
However, the benefit of installing a Crucial Racing Systems Coolsafe Thermostat is definitely not limited to cars with high performance radiators! Subarus with stock radiators will see the same benefit of lower coolant temperatures, lower oil temperatures (high oil temps are a common problem among cars that see occasional track use), less coolant temp overrun, increased detonation protection, and more power.
SAFETY: Under normal conditions, the Coolsafe Thermostat will operate like any other thermostat. But, unlike standard thermostats, our Coolsafe thermostat automatically locks into an open position should an overheating or failure condition occur, protecting the engine from serious damage. Any normal thermostat will lock in the closed position; a sure way to serious engine failure! Although a thermostat cannot completely prevent cooling system failure, it can greatly improve operating reliability in emergency situations. It is a wonderful safety feature for your Subaru, and the added performance is a welcome plus.
!!!!!
i have one on my 05 wrx and i saw its average water temp drop 8 degrees. This thermostat works backwards in a way thats why it has a fail safe
If you used another 160 degree thermostat it would do the same thing. Other than sticking open it is no different. The fact is that you can buy a $10 thermostat with a warranty that is 10 degrees cooler from any auto parts store. It will cool the car the same way this one will. But if you wanna spend and extra $40 on it, go for it. :screwy:
And as I said if the thermostat is stuck shut, which is what happens when they go bad, it will not be stuck open since it never opened, it would stay closed since it is stuck. When you start your car the thermostat is closed until it reaches 160 degrees. If the thermostat is stuck in that closed position it will not open when it reaches 160 degrees. It will not suddenly get stuck the whole way open either. All this thermostat will do is stay locked open if the car is already overheating from some other problem.
And you have no idea how a thermostat works. Explain to me how when a thermostat is stuck shut that is is going to suddenly open. It won't. If the spring breaks or car overheats do to another problem, sure it will lock itself open. But 99% of the time when a thermostat fails, it will never open. It will be stuck shut when the car is cold and when the car warms up, the thermostat stays closed. This thread is really a waste of time and starting to bore me.
I understand completely how it works. The spring has tension on the thermostat so it is pushing it open. This is called a failsafe thermostat. They are made by many different companies and available at your local autoparts store. They can and do fail. I have seen them get gaulded together and freeze shut. The spring is putting pressure on the thermostat to open it, but it is not strong enough. Now I will admit that this was not in a WRX, it was in my friends Camaro at the track. He was kinda pissed about it when he realized he could have got one at an autoparts cheaper and he could have returned it for another one. It was actually frozen due to iron from the water he used to dilute his antifreeze. Granted it did not fail do to thermostat itself, it still failed.
Honestly, there is not one coherent thought in this whole mangle of words. Just because you don't understand how it works does not imply that is doesn't. If/when a crucial thermostat breaks, it allows coolant to continue flowing through the radiator. Period.
G
sorry to jack an old thread...
...but anyone have any follow up on the Crucial? I'm considering picking one up... just flashed Cobb's Stage 1 the other day, and I noticed my needle went down a little from the normal dead center. Weird. Then again i was driving up and down the mountain passes here and it was snowing... so I don't know...
...but anyone have any follow up on the Crucial? I'm considering picking one up... just flashed Cobb's Stage 1 the other day, and I noticed my needle went down a little from the normal dead center. Weird. Then again i was driving up and down the mountain passes here and it was snowing... so I don't know...
crucial............eh $45?
no
autozone
Failsafe for $19.
AutoZone.com | | Thermostat | FAILSAFE THERMOSTAT
...........but really. i would put a $5 thermostat in. We aren't talking rocket science here. If you are really worried. Get this:
Water Outlet Restrictors - summitracing.com
but after reading all this, and being a prof. tech. for 15 years, i learned that thermostats are wax pellets. :eek3: you learn something new everyday
no
autozone
Failsafe for $19.
AutoZone.com | | Thermostat | FAILSAFE THERMOSTAT
...........but really. i would put a $5 thermostat in. We aren't talking rocket science here. If you are really worried. Get this:
Water Outlet Restrictors - summitracing.com
but after reading all this, and being a prof. tech. for 15 years, i learned that thermostats are wax pellets. :eek3: you learn something new everyday
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