No thermostat

[crashtestdummy]

Found and article, might help

There is a mistaken belief by some people that if they remove the thermostat, they will be able to solve hard to find overheating problems. This couldn't be further from the truth.

Removing the thermostat will allow uncontrolled circulation of the coolant throughout the system. It is possible for the coolant to move so fast, that it will not be properly cooled as it races through the radiator, so the engine can run even hotter than before under certain conditions. Other times, the engine will never reach its operating temperature.

On computer controlled vehicles, the computer monitors engine temperatures and regulates fuel usage based on that temperature. If the engine never reaches operating temperatures, fuel economy and performance will suffer considerably.

Thermostats have been calibrated to keep the temperature of the coolant above 192 to 195 degrees. It was found that if the engine is allowed to run at these temperatures, emissions are reduced, moisture condensation inside the engine is quickly burned off extending engine life, and combustion is more complete which improves fuel economy.

[arnarn]

how do i check if my thermostat is working or not? sorry noob question..

[kinyo]

^ quick test - immerse it in boiling water, see if it opens

long test - use a thermometer, slowly heat the water, and check if it opens at its rated temperature

[jick.cejoco]

Found and article, might help

removing a thermostat thinking it will solve some cooling problems anly lead to multiple problems as a result of overcooling. imagine yourself complaining of the heat in manila, but you go inside a meat locker at -15 degrees celsius, did it solve the problem? or did it create another but worse problem? the thermostat had been installed by the factory for a couple of reasons. they were mandated by around 400 or so engineers who designed that particular engine. who is juan who did not even finish high school telling you to remove the thermostat because "pampagulo lang yan" mentality. to give you some effects of overcooled engines:
1. the engine is inefficient, low power because you cooled off the heat given off by the fuel(cook rice and use a lot of firewood and raise the pot way lot higher away from the fire analogy),
2. the engine's pistons were machined with a clearance between it and the cylinder bore for aluminum piston expansion to better fit the cylinder bore- loose compression syndrome,
3. since the pistons are loose, there is a lot of blowby gases leaking unburnt fuel to the crankcase-crankcase emissions forming gum and varnish in the oil, demonstrated readily by the brown evidence on the oil dipstick end
4. shortens the service life of the oil because of contamination by unburnt fuel and of course acid formation,
5. sludge buildup because the oil is unable to get hot enought to expel the moisture it absorbed from the ambient air
6. the engine requires more fuel for the same power output, remember, you wasted the heat by overcooling,
7. since the piston is not allowed to fit properly into the cylinder walls by expansion from heat, the piston slaps and makes more noise,
8. removing the thermostat makes cooling imbalanced- the cylinder closest to the water pump is cooler than the cylinder farthest away, resulting in uneven heat distribution and dissipation causing the cylinder head or the engine block to warp,
9. since the combustion chambers are not hot enough, they tend to build up carbon requiring premature cylindr head servicing,
10. too cold of an engine results in increased HC (unburnt fuel) emissions, more CO(incompletely burnt fuel) emissions
11. for electronically controlled transmissions, they will never go to O/D (overdrive) because one of the parameters to overdrive is that the coolant temperature msut be around 190-240 degrees fahrenheit to enable the powertrain control module to engage the O/D mode in conjunction with the throttle sensor and vehicle speed sensor signals
12. it is just plain stupid to assume we know more than the engineers who burnt the midnight candle studying and figuring this s--t out
jick

[rion]

you can drill a hole on your thermostat if you like (for oldschool cars only). but never run without a thermostat...

[aga_cruz]

sir may dalwang hose yun kapain mo pag pareho ng init it means wla ng termostat pero pag yung isa mainit yung isa malamig it means meron pa naka install

[mark_t]

minsan sa sobrang init ng panahon parang gusto ko na din tanggalin thermostat ng 99 civic ko eh. naranasan ko na ito sa 96 lxi ko, naka recta yung fan no thermostat. parang mas malamig at maayos sya tumakbo although yung fact na lagi naka-on yung rad fan nakakatakot baka masunog agad yung motor. mahal ang bago/surplus na rad fan motor.

i may investigate the possibility of removing the thermostat sa civic ko ngayon and then using a timed switch mechanism to control the radiatior fan. that, or the aircon thermostat switch na ginagamit pag kino-convert yung aircon to automatic. i'm sure it can also control a fan.

from the dash, i can then select low, normal, high to control fan activation. pag low setting, maybe 1 activation every 2 minutes, and so on and so forth... selecting high will of course trigger full time fan operation.

matanda na kasi yung engine, at mapapadalas na magluko yung thrmostat at thermoswitch (its what turns on the fan. its a sensor). 700 yung thermostat, at 1200 yung thermoswitch sa casa. the problem is that these components become less reliable when the other parts like radiator, fans start breaking down one at a time.

at dito rin kasi normal operating temp is reached faster than in the temperate countries due to high ambient air temp (even if cold season dito). the engine cooling system will pressurise din naman even without thermostat, and i can do away with the thermoswitch.

what do you guys think?

Why not change to a bigger radiator?

But first ikaw ba naiinitan or yon engine ang nag overheat?
Magkaiba kasi yon.

[mark_t]

Another thermostat debate?

The only time removing the thermostat becomes a solution is when it gets stuck in the closed position. Contrary to popular belief, the thermostat increases the cooling system's efficiency aside from getting the engine up to operating temperature faster and keeping it there. So the whole argument that we don't need it because we're in a warm country is purely fiction.

Very smart! You can be my mechanic anytime.

[mark_t]

Found and article, might help

we just bought a 2nd hand honda lxi 1996. npansin namin wla na xang thermostat. ano kya posibleng reason nun? sabi kasi nung my ari di nya daw alam.

possible kayang nagoverheat na yun makina kya tinanggal?


help nmn po.. thx

Dinala yan car na iyan sa Siraniko.

Huwag mo ibabalik doon, sa iba naman. Doon sa makakatulong
talaga.

[mark_t]

sa tingin ko sa sobrang init ngayon kailangan na din tangalin ang thermostat lahat ng van ko diesel naka alis na lahat ang thermostat sa radiator pati rekta na din ang aux fan halos 4 year na ganun wala naman bad reaction na nangyayari

Nagka problema ka ba ng meron pa sila thermostat?