The Great Thermostat Debate [Merged]

[ezgrand]

After buying a used Prado I checked if the thermostat was taken out. True enough, tinanggal nga ng mekaniko! Hanggang ngayon madami pa rin naniniwal na dapat kalasin ang thermostat pag nasa Pinas! Comments please!

Ako, I installed an original Toyota stat immediately. Ung pagtanggal ng stat magiging 1/8 nga lagi ang reading sa temp gauge pero mainit na pala ang takbo ng makina!

[20vanda01]

My friend's 96 LXi Civic, did not removed his thermostat, pero for sure palyado na, and what he did is wire his auxilliary fan in such a way that it is always on. After two months of usage, LXi is still running good, and he haven't added water at the reservoir.

[mark_t]

My friend's 96 LXi Civic, did not removed his thermostat, pero for sure palyado na, and what he did is wire his auxilliary fan in such a way that it is always on. After two months of usage, LXi is still running good, and he haven't added water at the reservoir.

Huwag ka sasakay sa sasakyan ng kaibigan mo kung mahal mo pamilya
mo. Nakita mo naman kung paano nya alagaan sasakyan nya.

Ang tanong isasakay mo ba ang pamilya mo sa kotse nya?

[BlueBimmer]

advisable kaya 2 remove thermostat on my 320i? straight sixes are very HOT kasi....

[vinj]

If you ask my opinion, its there for a reason... the thermostat makes sure the engine works within a certain temp range... it regulates the temperature by adjusting the coolant/water flow into the engine.

When the engine is old, it doesnt work to spec anymore so peeps remove it... I still prefer to replace it. Soemtimes, the engine may take longer to run to temp also durin cold days and in the mornings, thus affecting efficiency.

[OTEP]

There is no debate - KEEP THE THERMOSTATS!

Kung saan saan kami nakarating makahanap lang ng thermostat for our Toyota 22R engine.

[frt]

I must agree...i removed the thermostat of my Gen 1 PAJ. Consumption increased...vehicle became a bit sluggish.

[ebbfolls]

Allow me to share my web-derived knowledge:

Removing the thermostat speeds the flow of the coolant through engine and the radiator, and the effect can be somewhat complex. First of all, the engine will have more coolant to heat up during startup, which extends the warmup period, consequently increasing fuel consumption and wear and tear (especially in cold climates) of the engine. Then, as the coolant finally warms up it will have less time to spend in the radiator, thereby decreasing the amount of heat transferred to the radiator fins. The result is that the water returns to the engine hotter than usual. The overall effect would then be extended warmup and a hotter engine coolant temperature, both of which do not really help in prolonging engine life.

[speedyfix]

removing the thermostat isn't advisable. just replace it with one of a lower temp para mas maaga bumukas yung fan. if you remove it completely i'm positive iikli yung life ng rad fan mo kasi lagi nga nakabukas.

[ebbfolls]

Actually, the radiator fan is switched on and off from the E.C.T. sending unit via a relay. You can remove the thermostat and the fan is still going to turn on and off depending on the temperature of the engine coolant.

[jeff]

may thermostat ba yung mga hyundai H100? saan ba makikita yung thermostat?

[ebbfolls]

Lahat ng liquid-cooled engines ay may thermostat. Almost 100% of the time nasa upper hose naka connect yung thermostat. Subaybayan mo lang yung hose papunta sa engine side. Yung flange na saan naka connect yung hose ay syang housing ng thermostat. Tanggalin mo lang ang flange na yun (held down by 2 or 3 bolts). Expect about 1/4 of the engine coolant to escape when you remove the hose.

[afrasay]

Keep the thermostat. Other things that needs thermostat: aircon,
ref, flat iron, oven, range, freezer...it's there for a purpose.

[jason7100]

hey guys! i read all the threads and I think dapat nga yata talaga andun yung thermostat. I had that problem with my honda vti... sabi nung mekaniko, wala na daw yung thermostat so ang tagal bago magbukas ng fan... sobrang init na talaga ng radiator before it turns on (pero di ba dapat hindi na sya mag-on kasi nga wala yung thermostat?). now I have to buy a new one... meron kaya nyan sa mga surplus shops dyan sa evanghelista? or if new, magkano kaya yun sa casa... (tragis gastos na naman...)

[jason7100]

Originally posted by ebbfolls
Actually, the radiator fan is switched on and off from the E.C.T. sending unit via a relay. You can remove the thermostat and the fan is still going to turn on and off depending on the temperature of the engine coolant.

if this is the case... what is the function of the thermostat? isnt this the one which turns on the fan? thanks!

[joey]

if this is the case... what is the function of the thermostat? isnt this the one which turns on the fan? thanks!

nope! thermoswitch un the one that controls the fan. ang thermostat works as temperature controled valve, sa right temperature magoopen cya para pumasok cool water sa engine at same time pagbumaba na temp ng engine nag cclose naman cya nireregulate lang nya na dapat na nsa certain level ang temperature ng engine, wlang pnagkaiba yan sa trabaho ng fuel regulator ng fuel rail ng mga efi engne ngayn cya nman minimaintain nya ung psi level sa fuel rail pra sa pagbukas ng injectors.
sa mga diesel or carby engine masmagandang wala ng thermostat sa hot climate na lugar like d2 hindi mo kylangan pinitin pa mainit na d2 e hehehe at same time dpa kagad andar ng andar radiator fan maslalo na pag rekta takbo mo.
may problema nga lang pag sa EFI engine pagwlang thermostat ung temperature controled na idle up ang tagal mag automatic kc hinihintay pa ng cmpter box thru temperature sensor na magnormalize sa tamang heat ang engine kaya ang taas ng idling, bad trip yan pagmatic ang tranny mo at mlakas kpa sa gas sir.

[moe]

doc otep, did you notice a dramatic change in your car's performance when you put in a new thermostat? my car hasn't had a thermostat the past 5 years and i haven't noticed anything wrong however your arguments are both valid and sound so I am seriously considering putting in a new one.

[joey]

ang nagging problema nga lang sa mga old cars pagmay thermostat by the time na nalaman mo na sira na ang thermostat ay nagoverheat kna sa highway, nagstockup yan ng close or minsan halfway kya dmo alam ngooverheat kna pla ng dahan2

[OTEP]

I recorded improved mileage on the Land Cruiser (from around 4-5km/L went to around 6++). This was based on real world driving and not a lab experiment so other external factors could have been involved. As for performance, I couldn't discern much difference. Still felt like the slow 100hp truck it used to be. hehehe.

[joey]

I recorded improved mileage on the Land Cruiser (from around 4-5km/L went to around 6++). This was based on real world driving and not a lab experiment so other external factors could have been involved. As for performance, I couldn't discern much difference. Still felt like the slow 100hp truck it used to be. hehehe.

agree ako jan, mkktipid ka sa 1st 10-20mins lang mula nung nagstart engine ka, with thermostat by 3mins nsa normal operating temperature na ang engine while without thermostat it will take 10-25mins pra mrating nya ang normal operating temperature kaya mataas idling, depende pa yan sa laki ng radiator masmalaki masmatagal