Direct connection radiator fan is harmful

[faziljaved]

To be honest i am afraid of adding expensive coolant just because I can't detect why the radiator is reducing water even though my radiator and all hose pipes are new.

either your radiator cap is loose or has worn washer or your reserve bottle is empty thats why when you put water in it the water goes into reserve bottle as soon as the engine runs and it gets hot. as you said your hose pipes were in perfect condition. another thing is a bad head gasket. it can also cause the water from water jacket around the cylinders to escape out. but thats i hope is not the case cuz you can see bubbles coming out in the radiator.

[shqamar]

if direct fan has so many disadvantages then why so many mechanics suggest that and so many cars running with direct fan

its easy to guide people wrong way rather than fulfulling all needs of a old car in which half of things are missing , half of the things our desi mechanics dont even know how to test , so its better to just cut one wire and run the fan direct , and funny enough they say on automatic fan your gaskit is always on high risk

[whiteangel]

its easy to guide people wrong way rather than fulfulling all needs of a old car in which half of things are missing , half of the things our desi mechanics dont even know how to test , so its better to just cut one wire and run the fan direct , and funny enough they say on automatic fan your gaskit is always on high risk

If some people are happy visiting our desi mechanics and have little knowledge about how to maintain a car then it is better that they keep sticking their head in the sand and listening to what our desi mechanics say.

I drive a 17 year old car. The radiator fan has always been on auto, the thermostat has not been removed. The original engine has done more than 235,000km and it is still in perfect running condition. The reason for that is that I do not blindly follow what our desi mechanics have to say.

[Xulfiqar]

Sir jee, wiring scheme to samj aa gayee, magar switch kahan lagay ga? jis ko ap fan switch keh rahay thay (diagram may wo to sensor hai). aik or hole hai wahan magr usko kisi nay block kya hoa hai. muje yeh confirm karna hai k fan switch wahan lagay ga ya nahi.

on the old 2A the coolant temp sensor and the radiator thermoswitch are nearby close together, the fan switch is usually before the thermostat housing which will actually be an entire separate box, And for clarity please post a picture of your engine.

[afarooqi]

on the old 2A the coolant temp sensor and the radiator thermoswitch are nearby close together, the fan switch is usually before the thermostat housing which will actually be an entire separate box, And for clarity please post a picture of your engine.

Ok Xulfiqar bhai i will post it by tomorrow.

[qadir12345]

I have installed thermostat valve and the temperature is almost midway on my mitsubishi lancer 92. As per original configuration fan switch (Sensor) should be installed in radiator. But as the radiator is not original mitsubishi radiator but Denso radiator (Japan Made) so there is no provision to install fan switch in it. I want to know where else can i place the switch apart from radiator...?

[Xulfiqar]

you would need to take a brass pipe piece and make two barbed lips on them for the pipe clamp to fit correctly. make a hole and solder a nut on it with the exact threads of the sensor.

Get a thermoswitch that has 2 wires on it, install this on the the pipe fitting you made, put the pipe fitting on the lower radiator pipe.

[qadir12345]

you would need to take a brass pipe piece and make two barbed lips on them for the pipe clamp to fit correctly. make a hole and solder a nut on it with the exact threads of the sensor.

Get a thermoswitch that has 2 wires on it, install this on the the pipe fitting you made, put the pipe fitting on the lower radiator pipe.

Thnx Xulfiqar for the advise. I really appreciate the suggestions from u as they r based on very realistic solutions. On the other hand i am still waiting from u the solution to my problem regarding my carby. I sent u mails too but still no response. This carby is marked as 32H 1. Need advise regarding it.

[Xulfiqar]

oh - sorry bout that.

Anyways about the carby - I would suggest that you inspect the sliding piston carefully then go for the repairing, the metering pin would be OK, it almost never wears out, Does your carburettor have a glass window on its side to see the fuel level in it? The float is to be adjusted to the middle of it. If not then you should need to open up the carb and bend/adjust the float lever or even replace the needle valve in some cases.

But even before anything you need to make absolutely sure about the vacuum connections to the carb and proper working of the distributor advance system along with correct valve clearances. This carburettor relies on engine vacuum for correct mixture pull.

[qadir12345]

oh - sorry bout that.

Anyways about the carby - I would suggest that you inspect the sliding piston carefully then go for the repairing, the metering pin would be OK, it almost never wears out, Does your carburettor have a glass window on its side to see the fuel level in it? The float is to be adjusted to the middle of it. If not then you should need to open up the carb and bend/adjust the float lever or even replace the needle valve in some cases.

But even before anything you need to make absolutely sure about the vacuum connections to the carb and proper working of the distributor advance system along with correct valve clearances. This carburettor relies on engine vacuum for correct mixture pull.

Thnx again Xulfiqar for a prompt response. I know that this carby works on engine vacuum. The issue is that more i am going into the systems of this car i see a lot lot of mess created by our professional mistrees... but anyway i intend to reverse their job. although its gonna be hectic but still i intend to go ahead with this. i know that for good tuning engine has to go on its nominal temp so i went to install T-valve and fan sensor. but i see follwing too:

1. heating pipes are not going to carby, hope it would affect later while tuning and to get best juice out of it.
2. To confirm correct vacuum do i hav to check engine compression?
3. is there any good mechanic in karachi whom u recommend to put hand on SU 32H1 carby ? or should i start playing with it myself? this carby is not having side glass to see fuel level.
4. After a lot of hard work on net i have digged out repair manual for this car. hope it will help me a lot in days to come but so far i am unable to get any help from this manual regarding specific carby. to overcome that I have also digged out the relevant documents for SU carbies and can take their help to tune this beauty.

Need ur advise for way forward.

[furri]

I really miss the old pw days when there were such informative threads !
nowadays noobs roaming on pw ....who just know 3 words intake,exhaust and iridium plugs !

[imran2d]

Sorry! I could not get the meaning of "noobs" can you please explain me. 2nd thing people can only speak what they know but they like to speak.

but I like all the people who write here on Pak Wheels as they want to know the things and they are interested to learn so it is good but everybody is careful when he is going to implement the advise given by others.

[MoizIrfan]

either your radiator cap is loose or has worn washer or your reserve bottle is empty thats why when you put water in it the water goes into reserve bottle as soon as the engine runs and it gets hot. as you said your hose pipes were in perfect condition. another thing is a bad head gasket. it can also cause the water from water jacket around the cylinders to escape out. but thats i hope is not the case cuz you can see bubbles coming out in the radiator.

gasket is fine, radiator cap was installed recently bought for rs 100.almost one glass of water reduces in radiator every day and reserve bottle also becomes empty everyday

[Xulfiqar]

Thnx again Xulfiqar for a prompt response. I know that this carby works on engine vacuum. The issue is that more i am going into the systems of this car i see a lot lot of mess created by our professional mistrees... but anyway i intend to reverse their job. although its gonna be hectic but still i intend to go ahead with this. i know that for good tuning engine has to go on its nominal temp so i went to install T-valve and fan sensor. but i see follwing too:

1. heating pipes are not going to carby, hope it would affect later while tuning and to get best juice out of it.
2. To confirm correct vacuum do i hav to check engine compression?
3. is there any good mechanic in karachi whom u recommend to put hand on SU 32H1 carby ? or should i start playing with it myself? this carby is not having side glass to see fuel level.
4. After a lot of hard work on net i have digged out repair manual for this car. hope it will help me a lot in days to come but so far i am unable to get any help from this manual regarding specific carby. to overcome that I have also digged out the relevant documents for SU carbies and can take their help to tune this beauty.

Need ur advise for way forward.

Mods, please move these carby posts to this users other thread inquiring the carburettor of his car.

now back to business - the heating pipes are for the automatic choke plate operation and also engine idle speed control when the engine is very cold, If that is jammed shut with rust - I would suggest you find a carburettor whose heated choke mechanism works. The old market would have plenty Im sure. This carb came in many makes.

[qadir12345]

Mods, please move these carby posts to this users other thread inquiring the carburettor of his car.

now back to business - the heating pipes are for the automatic choke plate operation and also engine idle speed control when the engine is very cold, If that is jammed shut with rust - I would suggest you find a carburettor whose heated choke mechanism works. The old market would have plenty Im sure. This carb came in many makes.

Xulfiqar thnx. plz reply to point 2 and 3 as well.

[Xulfiqar]

yes do check compression and you would need to consult with a few sports bike mechanics for a suggestion, but a few pointers first.

if the piston spring is cut or the piston is loose or the needle is scratched you need a new carb as its impossible to find a rebuild kit in Karachi

[afarooqi]

Ok Xulfiqar bhai i will post it by tomorrow.

Xulfiqar please see the attached images.

[Xulfiqar]

By the pictures you are showing, the part you are calling the temperature sensor is actually the fan switch and the socket you are showing with your hand is the A/C high pressure switch socket

The circuit is wired up as

relay - 2 pin A/C switch - single pin fan switch.

Its done this way because the toyota switches work in reverse - if the A/C high pressure switch opens up the fans will turn on, If you are not using A/C the switch remains shorted connecting the fan switch to ground and the circuit only opens when the single wire fan thermoswitch breaks ground connection hence running the cooling fans

The gauge temperature sensor is before the thermostat not after it. It would be near the water pump, look at the back of the engine for a single wire sensor.

Take a multimeter or line tester and trace the wires, one wire from this socket should be leading to the fan switch, and one wire should be leading to the relay in the fuse box. It would confirm this is the A/C high pressure switch.

Does your car have 1 or 3 fan relays? - 1 relay is for single speed fan and 3 relays are for dual speed fans, they work on low speed (in series) with A/C function and only switch to high (parallel) when the A/C pressure switch or engine thermoswitch opens up taking the fans to full speed.

here is a general diagram to make it simple

[faziljaved]

Thnx again Xulfiqar for a prompt response. I know that this carby works on engine vacuum. The issue is that more i am going into the systems of this car i see a lot lot of mess created by our professional mistrees... but anyway i intend to reverse their job. although its gonna be hectic but still i intend to go ahead with this. i know that for good tuning engine has to go on its nominal temp so i went to install T-valve and fan sensor. but i see follwing too:

1. heating pipes are not going to carby, hope it would affect later while tuning and to get best juice out of it.
2. To confirm correct vacuum do i hav to check engine compression?
3. is there any good mechanic in karachi whom u recommend to put hand on SU 32H1 carby ? or should i start playing with it myself? this carby is not having side glass to see fuel level.
4. After a lot of hard work on net i have digged out repair manual for this car. hope it will help me a lot in days to come but so far i am unable to get any help from this manual regarding specific carby. to overcome that I have also digged out the relevant documents for SU carbies and can take their help to tune this beauty.

Need ur advise for way forward.

i dont know what problem you are having with your carb but i just read this post of yours and just wanna add a few things.
engine vacuum and carb vacuum are two different things.
if your engine is weak i mean when you see smoke coming out of your exhaust pipe then your gasoline engine is weak and it will effect engine vacuum. not carb vacuum.
carb vacuum is in the venturi to bring the feul as the air passes through the tighter part and produces vacuum which causes the feul to be succed in. and the more the throtle is opened the more vacuum is created and more feul is succed in. this is opposite to manifold. at higher throtle the engine inlet manifold vacuum is zero but the carb vacuum is maximum.
engine vacuum is produced in the inlet manifold and not in the carb and if the engine vcuum is leaking from somewhere it will effect the idling of your car. vacuum is created only when the car is idling and there is no vacuum when the throtle plate is open and engine is running at higher rpms.
you should check your engine vacuum by checking your vacuum pipes coming out of your inlet manifold. if you find any leaks then thats the problem that needs to be fixed.
if your carb is giving you problems like the mixture is not balanced then your engine is not running properly. either the mixture is too rich or lean. this can also be noticed by the smell of exhaust gas. as for the correct level of feul in the carb you just need to check the float inside the carb. this is very easy. just a few small bolts in the bottom and you can get the float out. if it is leaky then you cant have right level of feul.

[qadir12345]

i dont know what problem you are having with your carb but i just read this post of yours and just wanna add a few things.
engine vacuum and carb vacuum are two different things.
if your engine is weak i mean when you see smoke coming out of your exhaust pipe then your gasoline engine is weak and it will effect engine vacuum. not carb vacuum.
carb vacuum is in the venturi to bring the feul as the air passes through the tighter part and produces vacuum which causes the feul to be succed in. and the more the throtle is opened the more vacuum is created and more feul is succed in. this is opposite to manifold. at higher throtle the engine inlet manifold vacuum is zero but the carb vacuum is maximum.
engine vacuum is produced in the inlet manifold and not in the carb and if the engine vcuum is leaking from somewhere it will effect the idling of your car. vacuum is created only when the car is idling and there is no vacuum when the throtle plate is open and engine is running at higher rpms.
you should check your engine vacuum by checking your vacuum pipes coming out of your inlet manifold. if you find any leaks then thats the problem that needs to be fixed.
if your carb is giving you problems like the mixture is not balanced then your engine is not running properly. either the mixture is too rich or lean. this can also be noticed by the smell of exhaust gas. as for the correct level of feul in the carb you just need to check the float inside the carb. this is very easy. just a few small bolts in the bottom and you can get the float out. if it is leaky then you cant have right level of feul.

Thnx Faziljaved for clearing my concepts. Plz check ur inbox.