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Old 03-26-2007, 03:39 AM   #1 (permalink)
 
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Default basic Q reg multicab



i recently purchased multicab 12v 4x2 pickup. na notice whenever i start the engine, i can hear the fan on the front noticeble. is this normal?

saka where sa cebu ang recommended mechanic nio for multicab? mga bro ung hindi overkill mag presyo ha. if possible gusto ko sana ung freelance.
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Old 04-09-2007, 08:58 PM   #2 (permalink)
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Same set up with most multicabs in Cebu (as well as mine).
When you turn the key to ACC, the radiator fan will turn ON, so you will
definitely hear the sound.

In other set up, the radiator fan will not operate until the engine temp
reaches a certain point. (attached with a thermocouple).

Please attach some photos of your ride.

Have a good day.
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Old 04-24-2011, 10:49 AM   #3 (permalink)
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Is the fan turning on before starting a bad thing? or just normal?

The FB I have does the same thing.
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Old 04-24-2011, 06:05 PM   #4 (permalink)
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Greetings!

Somebody shorted out the thermostat / thermo sensor at the bottom of your radiator. They do that in case it fails so the engine will never overheat. it is a BAD thing because the engine was designed to operate at a temp at 100 C +. That is because any water that gets inside the engine can boil away, and the metal parts in the engine expand when heated, so it needs to be hot enough for proper clearances after warm-up.

Also if the fan is always running the engine will get too cold sometimes and the automatic choke will come on causing it to idle rough until it gets hot again. This will foul your spark plugs.

Warning: Do not do any electrical work on your car with the ignition on- ALWAYS have your ignition OFF to prevent accidental grounding of wires, fuses blowing, wires burning up etc

First, (with the ignition OFF) un-short the wires (most likely they twisted them together at the thermostat / thermo sensor). Make sure one wire is connected to each of the 2 terminals on the thermostat / sensor. Chances are, they did not disconnect the wires from the sensor- they only shorted them together. If they are not shorted or tied together at the sensor, then it is possible they tied the wires up near the fusebox or in between. Good luck finding out where they did that.. I would just run new wires if that is what they did.

Warning: Do not do any electrical work on your car with the ignition on- ALWAYS have your ignition OFF to prevent accidental grounding of wires, fuses blowing, wires burning up etc

If the wires are disconnected and twisted together, then (with the ignition OFF) just untwist them and connect one wire to each connection on the sensor. It does not matter which wire goes to which connector- it is only an insulated temperature-controlled switch, so neither connection is grounded so there is no chance you will blow any fuse or cause any short circuit.

Just don't let either of the wires touch any grounded metal parts. Use electrical tape if they stripped off any insulation from the wires hen they twisted them together. This will protect them from touching any grounded metal parts.

Start your engine and watch the temp gauge carefully. If the fan turns on when the temp is about in the middle to just above the middle of the gauge, then the thermostat / sensor is working. The fan should turn off after a few minutes when the temp drops a little bit. This should continue to repeat on/off/ etc... every few minutes. If you rev the engine a *little bit,* it will quicken the fan on/off time.

If the fan does NOT come on and the temp gauge keeps going up past the middle, shut off the engine immediately, go to a radiator shop and get a replacement sensor. If you drive your multicab there, just short the wires again to keep the fan running. Do not drive it with the fan disabled, it will overheat.

Let the radiator mechanic install the new (or used) sensor and connect it properly for you and test it right there, as above. BE SURE he uses teflon tape or other kind of heat-proof pipe sealant (like silicone sealant) on the sensor threads to seal it so it does not leak coolant! Make sure he insulates any exposed wires with electrical tape- not masking tape, not celephane tape- black electrical tape only.

Theres all different sizes of sensors, so you will need to match it up with the correct size. This is easy because all multicabs with the same size engine (that I have ever seen) use the same thermo sensor, but a sensor for a honda, Kia or toyota probably will not fit. In an emergency I have used pipe adapters (with teflon tape of silicone to seal the threads) to make the wrong size sensor fit, but I do not recommend that.

No matter what solution makes the fan turn on/off, carefully watch the temp gauge the next few days to be sure it turns on/off faithfully, because it is possible a bad thermostat sensor can suddenly malfunction, but most often, if they are bad they do not work at all. If it starts to overheat suddenly, just turn off the engine, and short the wires again. Then go get a new or used sensor as soon as possible.

If you choose to leave the sensor shorted, it will be OK for awhile, but eventually you will have troubles like fouled spark plugs from the choke coming on during cold running, or damage to moving parts that are not at the correct operating temperature.

DO NOT let anybody convince you it's OK just to leave the sensor shorted and the fan running all the time. Mechanics always short those sensors out to "guarantee no overheating." They ALWAYS cheat like that. The Japanese are very good engineers- they put that temperature sensor in because there are good design reasons for doing so. If it was not needed they would not have put it in there to begin with!

They are very cheap- a used sensor will cost maybe p100. A brand new sensor (very hard to find) will cost about p300. Do not try to save money by just leaving it shorted even if your engine seems to run fine.

Mine was shorted when I first got my multicab, because it was not switching on the fan- it was defective. I changed the sensor with a used one. It ran better and sounded much smoother after I fixed it. It especially idled smoother when it was warmed up because the choke no longer was closing during running on cool nights. Better gas mileage too! The temperature gauge always stays right in the middle, not matter how hot or cold the weather.

Hope that helps
Craig in the mountains of Cebu
Where the Cebuana ladies outshine the orchid flowers by day, and the moon at nite!

Last edited by iesnes; 04-24-2011 at 06:45 PM.
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Old 04-25-2011, 05:07 AM   #5 (permalink)
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@iesnes, thanks very much...napag-isip ako dun...

wala pang one week ung unit sa akin, actually, papatignan ko ulit ung makina kasi although tahimik nmn kapag idling, na-bo-bother ako nung pag-on ng fan kahit nde pa actually ngsa-start...

tska gusto ko din palagyan ng aircon, na kasama ung mga passengers sa likod, nde lang sa driver's....paayos ko muna itong sa fan...

sa uulitin...thanks.
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Old 04-25-2011, 08:37 AM   #6 (permalink)
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how you will change the sensor? where is it located? do you have pix of it?
thanks.
my zuki attached
Attached Thumbnails
basic Q reg multicab-_mg_7240.jpg   basic Q reg multicab-_mg_7239.jpg  

Last edited by minimog; 04-25-2011 at 08:49 AM.
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Old 04-25-2011, 05:19 PM   #7 (permalink)
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nice. is your zuki amphibian? how deep in water can it go? looks real cool and 'macho' looking.
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Old 04-27-2011, 09:27 AM   #8 (permalink)
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Quote:
Originally Posted by archraymund View Post
nice. is your zuki amphibian? how deep in water can it go? looks real cool and 'macho' looking.
hohoho, got a little spin and swim at caliraya lake(laguna) it can go 2ft deep in the water. iam still working on the snorkle and sealed carb and distrib cap so i can go deeper.
cheers
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Old 05-06-2011, 08:13 PM   #9 (permalink)
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can you share how you did that, making your zuki run on water...im from cebu, its pretty cool to know that your ride can withstand water that deep...teach me and maybe upload some pix. if you dont mind
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Old 09-03-2011, 09:33 AM   #10 (permalink)
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Quote:
Originally Posted by iesnes View Post
Greetings!

Somebody shorted out the thermostat / thermo sensor at the bottom of your radiator. They do that in case it fails so the engine will never overheat. it is a BAD thing because the engine was designed to operate at a temp at 100 C +. That is because any water that gets inside the engine can boil away, and the metal parts in the engine expand when heated, so it needs to be hot enough for proper clearances after warm-up.

Also if the fan is always running the engine will get too cold sometimes and the automatic choke will come on causing it to idle rough until it gets hot again. This will foul your spark plugs.

Warning: Do not do any electrical work on your car with the ignition on- ALWAYS have your ignition OFF to prevent accidental grounding of wires, fuses blowing, wires burning up etc

First, (with the ignition OFF) un-short the wires (most likely they twisted them together at the thermostat / thermo sensor). Make sure one wire is connected to each of the 2 terminals on the thermostat / sensor. Chances are, they did not disconnect the wires from the sensor- they only shorted them together. If they are not shorted or tied together at the sensor, then it is possible they tied the wires up near the fusebox or in between. Good luck finding out where they did that.. I would just run new wires if that is what they did.

Warning: Do not do any electrical work on your car with the ignition on- ALWAYS have your ignition OFF to prevent accidental grounding of wires, fuses blowing, wires burning up etc

If the wires are disconnected and twisted together, then (with the ignition OFF) just untwist them and connect one wire to each connection on the sensor. It does not matter which wire goes to which connector- it is only an insulated temperature-controlled switch, so neither connection is grounded so there is no chance you will blow any fuse or cause any short circuit.

Just don't let either of the wires touch any grounded metal parts. Use electrical tape if they stripped off any insulation from the wires hen they twisted them together. This will protect them from touching any grounded metal parts.

Start your engine and watch the temp gauge carefully. If the fan turns on when the temp is about in the middle to just above the middle of the gauge, then the thermostat / sensor is working. The fan should turn off after a few minutes when the temp drops a little bit. This should continue to repeat on/off/ etc... every few minutes. If you rev the engine a *little bit,* it will quicken the fan on/off time.

If the fan does NOT come on and the temp gauge keeps going up past the middle, shut off the engine immediately, go to a radiator shop and get a replacement sensor. If you drive your multicab there, just short the wires again to keep the fan running. Do not drive it with the fan disabled, it will overheat.

Let the radiator mechanic install the new (or used) sensor and connect it properly for you and test it right there, as above. BE SURE he uses teflon tape or other kind of heat-proof pipe sealant (like silicone sealant) on the sensor threads to seal it so it does not leak coolant! Make sure he insulates any exposed wires with electrical tape- not masking tape, not celephane tape- black electrical tape only.

Theres all different sizes of sensors, so you will need to match it up with the correct size. This is easy because all multicabs with the same size engine (that I have ever seen) use the same thermo sensor, but a sensor for a honda, Kia or toyota probably will not fit. In an emergency I have used pipe adapters (with teflon tape of silicone to seal the threads) to make the wrong size sensor fit, but I do not recommend that.

No matter what solution makes the fan turn on/off, carefully watch the temp gauge the next few days to be sure it turns on/off faithfully, because it is possible a bad thermostat sensor can suddenly malfunction, but most often, if they are bad they do not work at all. If it starts to overheat suddenly, just turn off the engine, and short the wires again. Then go get a new or used sensor as soon as possible.

If you choose to leave the sensor shorted, it will be OK for awhile, but eventually you will have troubles like fouled spark plugs from the choke coming on during cold running, or damage to moving parts that are not at the correct operating temperature.

DO NOT let anybody convince you it's OK just to leave the sensor shorted and the fan running all the time. Mechanics always short those sensors out to "guarantee no overheating." They ALWAYS cheat like that. The Japanese are very good engineers- they put that temperature sensor in because there are good design reasons for doing so. If it was not needed they would not have put it in there to begin with!

They are very cheap- a used sensor will cost maybe p100. A brand new sensor (very hard to find) will cost about p300. Do not try to save money by just leaving it shorted even if your engine seems to run fine.

Mine was shorted when I first got my multicab, because it was not switching on the fan- it was defective. I changed the sensor with a used one. It ran better and sounded much smoother after I fixed it. It especially idled smoother when it was warmed up because the choke no longer was closing during running on cool nights. Better gas mileage too! The temperature gauge always stays right in the middle, not matter how hot or cold the weather.

Hope that helps
Craig in the mountains of Cebu
Where the Cebuana ladies outshine the orchid flowers by day, and the moon at nite!
sir i got a suzuki scrum 12 valve pick-up type but when i un shorted my sensor it feels hot inside the front seat, any suggestion what should i do? but the temp. gauge stays at the middle too
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