Direct connection radiator fan is harmful

[ToxicDevil]

DUH!

I found out where it is located. Where the lower pipe of radiator gets in.

[Xulfiqar]

yep - on some cars its on the upper pipe, (mehran etc)

[MoizIrfan]

How to identify if radiator fan is sucking air from the sides of shrouds not through it. should there be any gap between radiator and shrouds or it should be sealed with some rubber type material????

[NoWorNeVeR]

one question bros !

I own hondas for last like 7-8 years. currently have civic Vti 98. Its thermostat valve is removed but its temperature after 5 min reaches to 50% and stays there with or without AC, on long and local.

Similar behaviors was with my 90 civic with d-15B engine.

Whats this system that keeps temo to 50% without thermostat valve.

[Proverbial_Slang]

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...?

As per my knowledge, the 92 Lancer should have a radiator fan switch with a temperature sensor near the thermostats on the upper coolant pipe which goes towards the radiator. The radiator switch should not be an issue to find. If you are not able to find the Lancer switch, find one which will screw in to the thread as the standard temperature setting on thos switches is around 82.5 C. Should not be an issue.

I would advise against fabricating a new location for the temp sensor.

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.

Xulfiqar bhai your advice is spot on but I would suggest that he shouldn't mess with the float himself. All carby engine's manuals come with detailed diagrams with float level adjustment etc but should be done by someone who knows what they are doing.

[usman_haider84]

i have a cultus 06,its engine is not in perfect condition,engine blowing oil in air filter.i asked mechanic to turn fan automatic but he refused to do so by saying that u dont have cent percent engine and oil seals so dont make it automatic as it would turn into heats up problem.should i go for automatic in ds case?

[crazy_rider]

one question bros !

I own hondas for last like 7-8 years. currently have civic Vti 98. Its thermostat valve is removed but its temperature after 5 min reaches to 50% and stays there with or without AC, on long and local.

Similar behaviors was with my 90 civic with d-15B engine.

Whats this system that keeps temo to 50% without thermostat valve.

bro thermostat valve helps engine to warm up early especially in winters but radiator fans should always be auto whether summer or winter in winters when u crank ur engine the whole cold water revoles in th eengine which keeps engine cooler for a long time by applying valve u just restrict the water flow and only water in the engine gets warm until the valve reaches the desired heat

[shereabdullah]

what if tvalve fails to open n car gets overheated??
what is denaturation temp for gaskit??
is it safe to use tvalve and auto connection in a car which had overheating issue in past,(although no more)?

[engr.naveed]

same question. direct fan and no thermostat valve (Cultus VXR)

one question bros !

I own hondas for last like 7-8 years. currently have civic Vti 98. Its thermostat valve is removed but its temperature after 5 min reaches to 50% and stays there with or without AC, on long and local.

Similar behaviors was with my 90 civic with d-15B engine.

Whats this system that keeps temo to 50% without thermostat valve.

[Xulfiqar]

what if tvalve fails to open n car gets overheated??
what is denaturation temp for gaskit??
is it safe to use tvalve and auto connection in a car which had overheating issue in past,(although no more)?

by this rationale I can also say - what if you have a heart attack while driving? Or what if your oil pump gears break while driving - it wont cause heatup but will fully sieze the engine to the point of it becoming scrap metal.

This what if is a notion already undertook when you buy a car

[umarkhan1]

by this rationale I can also say - what if you have a heart attack while driving? Or what if your oil pump gears break while driving - it wont cause heatup but will fully sieze the engine to the point of it becoming scrap metal.

This what if is a notion already undertook when you buy a car

question:
why jap cars are fitted with 88 deg t-valve??
they become fully opened at 100 deg,while the radi fan kicks in at 98 deg and switches off within a minute.
it means that the t-valve never fully opens??

[engr.naveed]

@umarkhan1 plz answr my query

[shereabdullah]

by this rationale I can also say - what if you have a heart attack while driving? Or what if your oil pump gears break while driving - it wont cause heatup but will fully sieze the engine to the point of it becoming scrap metal.

This what if is a notion already undertook when you buy a car

last year, when head gaskit blow up, car was equiped with t valve and auto connection, n temp needle did not show more than half deflection,, what should be remedy for this??

[Xulfiqar]

question:
why jap cars are fitted with 88 deg t-valve??
they become fully opened at 100 deg,while the radi fan kicks in at 98 deg and switches off within a minute.
it means that the t-valve never fully opens??

the thermostat valve placement is also very important, in some engines its placed where the tail is the hottest part while the nose is the coldest part - for such systems the valve should have high hysterisis (slow reaction) to prevent rapid to and fro movement. The cooling efficiency of the radiator is pretty high for the engine and a valve is required for this function to keep a good temperature all over the system. The valve housing itself can be of regular open/close or even bypass type, bypass type has three modes

1 - closed
2 - mixed
3 - full open

regular type has just two modes - closed and open, there is no dedicated bypass blockoff.

all in all - the regulation temperature of the valve is highly dependant on where its placed in the system

now for the fan switching on and off within a minute - that is dependant on the fan cut in and cut out temperature - if either is reached and the function is called for and is actually executing then all is good as designed.

[usman_arooq2]

direct fan and removing t.stat valve does not remove the risk of overheating, actually the chances of engine damage are doubled cause if something is causing it to overheat than it'd overheat eventually no matter what but it the overheating problem just wont show up in short trips(during which engine is facing heavy wear n tear being operated bellow optimal operating temp) and during a long trip u'll see that it overheats but u could be long way from ur trusted mechanic / help if u blow a head gaskit or some cooling system pipes leak due to heat n pressure(happened to me once in a mehran).

[umarkhan1]

@umarkhan1 plz answr my query

with no t-valve and auto fan the temp needle should be near the C mark,(without ac)
your issue seems to be clogged radiator.get it serviced

[engr.naveed]

radiator was serviced last month but no effect...needle remains at mid throughout in local(after 5 km) or on long drive (once 400 km non stop)

with no t-valve and auto fan the temp needle should be near the C mark,(without ac)
your issue seems to be clogged radiator.get it serviced

[umarkhan1]

radiator was serviced last month but no effect...needle remains at mid throughout in local(after 5 km) or on long drive (once 400 km non stop)

are you sure that t-valve is not installed??

[engr.naveed]

yes 100 %.confirmed from mechanic.

are you sure that t-valve is not installed??

[syncview]

yes 100 %.confirmed from mechanic.

that is impossible if the system isn't clogged