Should you remover thermostat?

[Smoked2020]

correction:
the engine runs on open loop when you first start it and remains in open loop until the coolant temperature signal reaches about 170 degrees fahrenheit. if the CTS is bad (high resistance), the controls remain in open loop regardless you have been driving all day. it also remains in open loop if the engine is overcooled. when you press the throttle above 40% it goes to open loop from closed loop. the closed loop happens when the parameters such as warm engine, throttle not above 40% and there are no problems that would affect the controls to go on limp mode

Wow, this is too deep for me. If this is just a medical jargon, i would easily get it but no, i dont understand it at all. hehehe peace! sensya na talga mga boss. so basically, if i am still consuming too much fuel after putting back the thermostat, there must be something wrong with the CTS, tama po ba? how would i know if the CTS has gone bad?

[kotiko]

I've just refitted my thermostat and I feel much more comfortable about it. The car heats up faster, hopefully that will partially solve my high fuel consumption. I only do short trips and my engine temp only reaches normal operating or mid level when I'm already close to my destination. Still gonna observe.

If you have a busted Coolant Temperature Sensor, my experience with this is that the engine will have hard re-starting especially on the same day after a bit of traveling. The reason for this is the sensor is giving a low temp reading so there's overfueling happening sa mixture when starting.

You can usually check the reading of the CTS using a OBDII scanner.

[isa1023]

I see, thanks for the correction sir jick!



I'm currently using a low temperature thermostat that opens at 160 degrees Fahrenheit.

Does that mean that under normal driving conditions (no throttling above 40%, only low-rpm range til 3000 rpm), my ECU will run open loop and consequently maintain the fuel-rich mix throughout?

[jick.cejoco]

I see, thanks for the correction sir jick!



I'm currently using a low temperature thermostat that opens at 160 degrees Fahrenheit.

Does that mean that under normal driving conditions (no throttling above 40%, only low-rpm range til 3000 rpm), my ECU will run open loop and consequently maintain the fuel-rich mix throughout?

the opening temperature of the thermostat does not mean it stops a rise in temperature. the fan thermoswitch does not kick on until around 212 degrees fahrenheit and is controlled to about 235 degrees inside the pressurized cooling system. sure the thermostat may be open, but the heat output of the combustion does not stop there, that's why you control the coolant temperature by means of the radiator fan cycling.

[kompressor]

Upon removing the thermostat, we assume that the engine will never reach ideal operating temperature in ideal time on normal driving conditions.

On EFI systems, the ECU will run rich mixture on "closed loop" after cold starts.

Does that mean it will always run "closed loop", ie not all sensor signals considered, when you remove the thermostat?

it will eventually reach the ideal operating temperature on normal driving conditions but on a way longer interval since the engine will heat the coolant anyway until the thermoswitch kicks in to drive the cooling fans, which regulate the optimal temp (turns on and off depending on temp reading).

the ECU will eventually compensate with the fuel delivery once the temp sending unit sends the correct reading but take note that on highway driving, some vehicles with big radiators will cool the engine down even without the fans operating unless there's a thermostat present.

[duskylim]

Dear Sirs:

Several of the things that the thermostat does (aside) from speeding up the warm-up - is:

1) making the engine's warm-up even - removing the thermostat and its slight restriction to flow means that the water circulation speed in the block and head are faster - which tends to result in UNEVEN cooling within them - especially during cold warm-ups.

Cooling water will flow faster through the larger passages and slower through the smaller ones - making some areas over-cooled and some hotter - ultimately resulting in thermal distortion of those parts.

2) By separating both block and radiator water - it keeps the water in the block hotter - and conversely water in the radiator cooler - thus makes the cooling MORE EFFICIENT - as the hotter block water flows into the radiator, its higher temperature difference will allow it to lose heat faster to the ambient air while similarly the cooler radiator water entering will more rapidly cool the block.

Note that all thermostats do in fact include some sort of relief or hole - not just to allow small flows but mainly to allow the system to fill up in the 1st place - it serves to vent and release the air or steam trapped in the block.

Best Regards,

Dusky Lim

[iceman_uel]

I recently installed a thermostat rated at 170 deg. to our Nissan Vanette 2.0 Gas Engine (Local Version).
But before we got our Vanette (second hand) wala na siyang thermostat and it takes a very long time for it to reach normal operating temp.
My query, is the 170 deg. thermostat too cold because it can only manage to raise the engine temperature to 1/4.

[CVT]

I recently installed a thermostat rated at 170 deg. to our Nissan Vanette 2.0 Gas Engine (Local Version).
But before we got our Vanette (second hand) wala na siyang thermostat and it takes a very long time for it to reach normal operating temp.
My query, is the 170 deg. thermostat too cold because it can only manage to raise the engine temperature to 1/4.

Bro., is that the original Vanette thermostat? I still own a Vanette, and I still keep its original thermostat, which I replaced some years ago.

I will check its trigger temperature, as you should only use one (third party) with the same trigger temperature.

17.0K:out:

[iceman_uel]

*CVT
I have asked Youngbros, Yen Commercial, Nissan Parts and Nis-Parts Banawe where I bought my thermostat and they all told me that it was the OEM for our Vanette. But it only reaches 1/4 temp even in a very hot day and in traffic with a/c on full.

I'll be glad to know if you can tell me its trigger temp.

[CVT]

*CVT
I have asked Youngbros, Yen Commercial, Nissan Parts and Nis-Parts Banawe where I bought my thermostat and they all told me that it was the OEM for our Vanette. But it only reaches 1/4 temp even in a very hot day and in traffic with a/c on full.

I'll be glad to know if you can tell me its trigger temp.

I will bro.,- just stay tuned to this thread. Most probably tonight. Or, I will PM you. I have already placed this action item in my personal calendar.

If you're at 1/4 temp and gas consumption is not really a big deal to you,- then honestly, you should be a happy camper.

A good number of Vanette owners complain about overheating.

Just being curious here,- was the radiator changed? Original was 2 rows and you can change that to 3 rows without so much alteration in the engine bay... *** Am still using the original radiator ***

Is it still fan clutch you're using? *** Am still fan clutch but have replaced the original ***

Have you relocated your second condenser or heat exchanger (the one that is in front of the radiator)? *** I did and placed it underneath the front passenger *** <<< resolved the issue of abnormal heating years ago. ***

How about the condenser, which is parallel to the ground (and is originally beneath the radiator)? Was this also relocated somewhere? *** I have not moved this condenser ***

TIA.

17.0K:out:

[iceman_uel]

*CVT
Will do Bro. Thanks a bunch!

OEM 2 Rows Radiator is still intact. (Newly Overhauled).
OEM Fan Clutch was nakaweld/rekta before But I also replaced it just recently with a repairable type (replacement only).
The second Condenser was already relocated in the front under the passenger side.
The other Condenser is still in it's original location which is as you said parallel to the ground.
And Am only using distilled water as a coolant.

[CVT]

*CVT
Will do Bro. Thanks a bunch!

OEM 2 Rows Radiator is still intact. (Newly Overhauled).
OEM Fan Clutch was nakaweld/rekta before But I also replaced it just recently with a repairable type (replacement only).
The second Condenser was already relocated in the front under the passenger side.
The other Condenser is still in it's original location which is as you said parallel to the ground.
And Am only using distilled water as a coolant.

Sorry mods,- OT - Bros,- if the radiator fan is welded on the shaft,- then, aren't you bothered when running at high revs?

Am using 50%coolant and 50%distilled H2O.... May Vanette Club dito sa tsikot

http://tsikot.com/forums/nissan-cars...1/index33.html

Last EB was two Saturdays ago was at Shell, Macapagal Ave.,- near MoA

17.0K:out:

[CVT]

Just checked the original Vanette thermostat.

It is marked 76.5C.

I will try to post a pic later.....

17.0K:out:

[CVT]

I recently installed a thermostat rated at 170 deg. to our Nissan Vanette 2.0 Gas Engine (Local Version).
But before we got our Vanette (second hand) wala na siyang thermostat and it takes a very long time for it to reach normal operating temp.
My query, is the 170 deg. thermostat too cold because it can only manage to raise the engine temperature to 1/4.

I assume it is in Fahrenheit, bro.

170F is equivalent to (170-32)*5/9 = 76.7C, and so is the same temp trip point as the OEM thermostat....

17.0K:out:

[iceman_uel]

Sorry mods,- OT - Bros,- if the radiator fan is welded on the shaft,- then, aren't you bothered when running at high revs?

Am using 50%coolant and 50%distilled H2O.... May Vanette Club dito sa tsikot

http://tsikot.com/forums/nissan-cars...1/index33.html

Last EB was two Saturdays ago was at Shell, Macapagal Ave.,- near MoA

17.0K:out:

Well bro the only advantage I can think of for having the fan clutch welded by the previous owner was to lessen the overheat issue because the radiator was clogged then and other than that wala na. Disadvantage is maingay/maugong on high rpms and a bit high on FC.

I didn't have the chance to go to the Last EB because of work constraints, though sayang kasi may inihandang hands on si bro macgyver.

[iceman_uel]

Just checked the original Vanette thermostat.

It is marked 76.5C.

I will try to post a pic later.....

17.0K:out:

Thanks a lot bro. CVT, at least now confident na ako sa ikinabit kong thermostat na tama ang temp rating niya.

[iceman_uel]

I assume it is in Fahrenheit, bro.

170F is equivalent to (170-32)*5/9 = 76.7C, and so is the same temp trip point as the OEM thermostat....

17.0K:out:

Yes Bro. 170 degrees Fahrenheit = 76.5C. Thanks a lot Bro.


Am a member of VCP (Vanette Club Of The Philippines) too.

[JapanABC]

Yes Bro. 170 degrees Fahrenheit = 76.5C. Thanks a lot Bro.


Am a member of VCP (Vanette Club Of The Philippines) too.

You can buy thermostats at banawe, for a cheaper price without the profit of the Car manufacturer and casa.
TAMA - Brand is made in Japan, It is a sales company of Nippon Thermostat Co. LTD which is the Original Equipment manufacturer of thermostat for major Car manufacturers. It is cheaper because the brand is direct from factory -distributor rather than going from factory - Car manufacturer - Casa.
（Domestic customers）
・AISAN INDUSTRY CO., LTD. ・NIKKI CO., LTD.
・AISIN SEIKI CO., LTD. ・NISSAN MOTOR CO., LTD.
・ISUZU MOTORS LIMITED ・WALBRO JAPAN LTD.
・CALSONIC KANSEI CORPORATION ・NIDEC CORPORATION
・KAWASAKI HEAVY INDUSTRIES, LTD. ・HITACHI AUTOMOTIVE SYSTEMS, LTD.
・KUBOTA CORPORATION ・FUJI HEAVY INDUSTRIES LTD.
・KEIHIN CORPORATION ・BOSCH CORPORATION
・SUZUKI MOTOR CORPORATION ・HONDA MOTOR CO., LTD.
・DAIHATSU MOTOR CO., LTD. ・MAZDA MOTOR CORPORATION
・TAMA ENTERPRISES CO., LTD. ・MIKUNI CORPORATION
・TK CARBURETTOR CO., LTD. ・MITSUBISHI MOTORS CORPORATION
・DENSO CORPORATION ・YAMAHA MOTOR CO., LTD.
・TOYOTA MOTOR CORPORATION ・YANMAR CO., LTD.

(Overseas customers）
・ASC INDUSTRIES, INC.　
・CHRYSLER GROUP LLC　
・DANA CORPORATION　
・GENERAL MOTORS CORPORATION
・HOCHENG CORPORATION
・KTM SPORTMORTORCYCLE AG
・KWANG YANG MOTOR CO., LTD.
・MAGNA POWERTRAIN INC.
・PIAGGIO C. S.P.A.
・POLARIS INDUSTRIES INC.
・SANYANG INDUSTRY CO., LTD.
・TAIWAN KEIHIN CARBURETOR CO., LTD.
・UNISIA MEXICANA, S.A. DE C.V.
・WP COMPONENTS GMBH

[gutz_3110]

I see sir, but I do not use radiator coolant anymore, distilled watar lang ang nilalagay ko, before I use coolant, yun nga lang hindi regular noon yung pag flushing ko ng coolant, kaya yun nga nabutas yung 2 tube ng radiator, also I have very bad experience sa thermostat ko noon, hindi nag open sa tamang temp running along SLEX, yung result biglang nag high temp yung gauge, wala pa ako idea noon kung anu ang naging cause, I'm thinking baka yung water pump na ang deffect, pero natrace ko din na yung cause ay sa deffective thermostat.

*kiantot,

distilled water, san nabibili? pwede ba yun nasa grocery?

[gutz_3110]

sabi nung gumawa ng radiator ko, ok lang walang t-stat. but then after backreading, dapat meron. yun current temperature ko siguro 2 increments below the middle. ano ba ideal temperature? i'm getting a thermostat this weekend.