Running without a thermostat valve

[daimaoh]

my radiator cracked due to a faulty thermostat valve.

tinanggal na lang ng mechanic at hindi na pinalitan.

so far, same pa rin yung normal running temperature ko based on my gauge.

since we live in a tropical country, do i still need replace it?

thanks

[mazingerZ]

Yes. Why, because running without a thermostat means that you are running your engine cold every time you start it much longer than with a thermostat that closes and opens whenever your engine reaches its optimal temperature. In short, your engine would take a longer time to reach its optimal temperature. Better replace it bro, mura lang naman.

[daimaoh]

weird thing is mas mabili sya uminit to optimal temperature ngayon. or is that due to the faulty thermostat before? or maybe dahil summer ngayon?

Yes. Why, because running without a thermostat means that you are running your engine cold every time you start it much longer than with a thermostat that closes and opens whenever your engine reaches its optimal temperature. In short, your engine would take a longer time to reach its optimal temperature. Better replace it bro, mura lang naman.

[DonT]

weird thing is mas mabili sya uminit to optimal temperature ngayon. or is that due to the faulty thermostat before? or maybe dahil summer ngayon?

Most probably, you need to get teh radiator cleaned...assuming there is no change in the coolant level.

[mazingerZ]

Yup, tama si sir dont, baka barado ang radiator mo. With regards to radiator failure, I dont see any connection relating to the thermostat. Ang scenario kasi kung meron kang thermostat is that closed siya during initial startup, meron nang water sa loob ng water jackets ng engine mo, naturally iinit yung nasa water jackets, which causes the thermostat to open (gurus correct me if im wrong is it 110 degrees celcius?), then circulation of water will happen. Tama ba? Baka lalo ka lang nalito hehehe

[XTO]

mabilis mag-init? check your water pump and the radiator itself.... ilang years na po ba? you have the choice: replace it or have it overhauled then finally replace your thermostat- importante yun....on the part of the mech - madali kasing mag-alis kesa maghanap.

[DonT]

Yes, it is required to replace it for economical/ efficiency reasons.

However, whats the connection between the Radiator failure and the thermostat. I guess this is also one of the urban legends which must be busted.

[daimaoh]

not sure why the top of the radiator cracked. thought it was due to the closed thermostat. temp gauge went over the red line. kaka-overhaul lang ng radiator a few months ago. tumagas yung hose sa likod ng engine.

now, the top is replaced with a fabricated one after another overhaul. still no thermostat any everything still seems normal.

i'll probably replace the thermostat... just to be sure.

thanks

Yes, it is required to replace it for economical/ efficiency reasons.

However, whats the connection between the Radiator failure and the thermostat. I guess this is also one of the urban legends which must be busted.

[userfriendly]

The plastic top cracked bec the plastic is like a fuse for your radiator. Its designed to give incase of overheat to protect your head gasket.

[jaguarpw]

The plastic top cracked bec the plastic is like a fuse for your radiator. Its designed to give incase of overheat to protect your head gasket.

Upon reading this thread I can't help but reply because last Sunday, this is exactly wht happened to my car . I was navigating a winding uphill climb on a mountainous municipality - a route that i have never tried before. I could feel the strain on the engine as I sometimes downshift to 1st gear when i need all the torque i can get. I also shutoff the aircon. All the while, the temp gauge in the dash indicated normal, so there was no worry whatsoever on my mind.

Then i heard an explosion and steam was coming out of the hood. Upon opening the hood, i found the radiator plastic cover was broken; I picked up the broken piece few meters away. It was a classic example of overheat. Thank God my engine was okay.

So yesterday, I replaced my radiator. I also charged 2L coolant.

Now my question is: Why did my temperature gauge fail to indicate the hotness? Is my thermostat ok? So far, during cold start, the pointer is at "C" (cold), then after a while of driving, the pointer goes to around 25% to 40% mark but never from my experience did it exceed 40%. That's why nagulat nalang ako nang biglang sumabog.

My plan is to verify if my radiator fan does work. Am i right that it should start automatically once it senses the prescribed temperature?

Another concern is: once you experience an overheat, what should you be on lookout for? I was told that the cylinder head might have been damaged nd that one sign of this is bubbles in the radiator. So far naman, I couldn't see any bubbles when i cahrged water and let the engine run at idle. So does this mean, wla problema cylinder head and gaskets ko?

Thanks in advance for your ideas....

[17M]

Yes. Why, because running without a thermostat means that you are running your engine cold every time you start it much longer than with a thermostat that closes and opens whenever your engine reaches its optimal temperature. In short, your engine would take a longer time to reach its optimal temperature. Better replace it bro, mura lang naman.

The thermostat is an integral part of the any cooling system. Removing it will cause the car to run longer at sub normal operating temp. Running at sub normal temp is the worse torture you can do to your engine. That's why idling to warm-up is not good. It will take longer to reach normal operating temp. Upon starting just allow enough time for the oil to circulate & drive off slow. Notice that at about 1 km you have reached normal operating temp. That is if you still have your thermostat on. Removing the thermostat is a convenient shotgun solution to an overheating problem. If your car overheats with a good thermostat on just means there are other problems in your cooling system. "Hindi kailangan ang thermostat dito sa Pilipinas" is a old, old urban legend.

[daimaoh]

need help guys....

it's been around over a month and i still can't find a replacement for my thermostat. my car is a 1.3 b13 sentra.

what's available is slightly longer at the top from what i have. it might not fit properly.

any suggestions?

thanks

[niky]

Have you tried at Banawe? There are some Nissan specific stores that might have it. GA-block thermostats should be common parts, but from what I remember, the 1.3 - 1.4 blocks are a bit different from the 1.6, so that's where you might be having a problem.

[daimaoh]

Have you tried at Banawe? There are some Nissan specific stores that might have it. GA-block thermostats should be common parts, but from what I remember, the 1.3 - 1.4 blocks are a bit different from the 1.6, so that's where you might be having a problem.

i've already went to said shops. what there offered me is an original of the longer sized one. kasya daw. alam ko nga meron for 1.3 & for 1.5/1.6. wala akong makita ng for 1.3. same temp rating naman.

any thoughts kung kasya kaya talaga ito sa housing?

thanks

[jaguarpw]

Hi guys, it's been a month since I posted in this thread. Just want to update about my problem with the fan. turned out that the root cause is loose wiring that's why the AUX fan won't start. I had the wiring re-done and ensured that the splicing won't come off.
And it's also now that i have studied the fan operation. From cold start, the fan won't start with the engine - of course, because the engine needs to warm-up. Then when it's hot enough, the aux fan begins to spin. Then when the water cools, the fan stops. Therefore it is a start-stop-start-stop affair.
However, it's a different story when I switch on the aircon. Both fans will start at the same time. This is understandable since the A/C compressor is an additional load to the engine.
I'm happy it was only a small problem. No need for expensive parts replacement. Just gave a violet bill to the technician and that's it