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Car Radiator

04/04/2010 2:30 PM

We have 800 cc car, and live in karachi Pakistan, here is traffic problem, means traffic jam often time, so my cars temperature nidle shows high...and the engine also hot...how we can improve my car cooling system..any body have a new idea,

I use water in radiator,

Munawer Hussain

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#1

Re: CAR RADIATOR

04/04/2010 2:45 PM

Install a coolant recovery system if your vehicle doesn't have one. This will remove any air that may be in your system. Air doesn't transfer heat well.

Use some type of additive in the radiator. If not pure, water will leave mineral deposits that don't conduct heat well. And cause rust. Antifreeze raises the boiling point of water, which helps to keep the radiator from boiling over and loosing coolant.

Maybe the cooling system needs to be flushed and serviced.

Get a higher capacity radiator.

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Anonymous Poster
#15
In reply to #1

Re: CAR RADIATOR

04/05/2010 10:03 AM

Fit a HOD system,run cooler and further with a cleaner engine from the inside

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#2

Re: CAR RADIATOR

04/04/2010 2:54 PM

check to see if cooling fan is working

if it has engine driven fan consider adding an electric fan as well.

blow out honey comb of radiator or wash it use hose pipe.

the grills become blocked with dust insects etc

adding a small amount of antifreeze will improve the waters ability to remove heat.

check the radiator cap is of the correct pressure

check thermostat

that lot should do it

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#3

Re: CAR RADIATOR

04/04/2010 2:55 PM

what is exact model of car ?

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#22
In reply to #3

Re: CAR RADIATOR

04/06/2010 2:03 AM

SUZUKI 1990, alto,

796CC

Manual

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#23
In reply to #22

Re: CAR RADIATOR

04/06/2010 3:58 AM

Munawer,

I know this car.

We've had one in the fleet.

For others: Its a transverse alloy head OHC with an electric fan. No A/C. ( Really. It's 800cc! The entire engine can be carried with one hand.)

Munawer,

You say you've been using water as the coolant. Wrong

It's an alloy cyl.head. Most important you use proper coolant mix.

Take off the radiator cap and look into the tank and under the cap. 1.Is the water rusty? 2. Is there a rusty sludge build up on the underside of the cap? Carefully fill the radiator to the very top, start the engine and let it idle. Whist looking into the full tank 'blip' the trottle at the carby. 3. Does it throw water out? 4.Are there any bubbles coming to the open top of the filler neck?

Let the engine warm to running temp. Does the fan start when the guage gets into the red sector? If it doesn't you should check first that the fan does run by applying positive current to the unclipped pos.lead, at the fan. Pull off the wire from the fan control temp switch and ground it to the engine. If the fan is good and still doesn't run it's a faulty switch.

If you get 'yes to numbers1,2,4, there is a better than average chance that you have a corroded cyl. head and it's leaking combustion gases into the coolant system. That's serious. Means large engine repair by experts.

If you get yes to 3, remove the thermostat and test/replace it. Try briefly running without the thermostat installed and see if you still get overheating.

My suggestion is that you remove the radiator and thoroughly clean it inside and out, make sure that the engine is flushed as well, and then after having resolved the fault you should be good to go. Using the proper mix of coolant and water

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#24
In reply to #23

Re: CAR RADIATOR

04/06/2010 4:33 AM

I am totally surprised to actually be the first one to give you a GA for your technically correct answer.....the OP should personally fly to where you live and thank you!!

(Maybe not exactly so!)

I would just like to add that as you say, correct antifreeze is even needed in countries where it does not freeze as its other (one of them anyway!) functions is to protect metal parts from corrosion.

The one bad part about antifreeze is that it actually slightly slows down the heat transfer a bit - that is an over strong solution (-30°C or more) in a warm country is also not correct. (Mitsubishi made such a mistake with Diesel Gallants delivered to Germany in 1983......many damaged the cylinder heads eventually by over heating! The cylinder head design was also not fully correct either which exacerbated the problem even more. I had one of these cars!!)

My best offer for countries where it never freezes is to either follow the makers recommendation or set for around -15°C or so. That should still protect metal and allow proper cooling....

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#25
In reply to #23

Re: CAR RADIATOR

04/08/2010 7:46 AM

Thank you for giveing me the brief infomation , which will help me for better, result.

Thanks once again

Munawer Hussain

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#5

Re: Car Radiator

04/04/2010 10:18 PM

Very simple: more water or more air to cool down the engine. Water?

Is the designed flow maintained? Water pump, hoses? You put enough water in it? Air?

If your engine has a radiator, keep it clean and make enough air flows through it.

When this doesn't help, CR4 will explain how to improve your car.

Considered walking too?

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#6

Re: Car Radiator

04/04/2010 10:30 PM

I forgot to mention the thermostat in the water circuit, that maybe doesn't open enough.

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#7

Re: Car Radiator

04/05/2010 12:03 AM

Peterg7lyq has given you a pretty complete of mostly maintenance items to look at. The fact that you use water and not engine coolant is not helpful because water boils at a lower temperature than engine coolant. Part of the same theme is that it is important to have a suitable radiator pressure cap as this also increases the fluid boiling temperature.

Heat transfer is very much function of the velocity of the cooling air, the surface area used to exchange the heat (and the cleanliness/efficiency of that surface) and the temperature difference between the hot liquid and the cooling air. Good maintenances will maximise heat transfer to the level that the basic vehicle design permits and after that all you can to is in increase any or all of the items I mentioned by something bigger and better - a larger radiator, a bigger/faster engine fan with perhaps better shrouding, or a higher boiling point fluid. there is nothing wrong with an engine running relatively hot as long as it does not start to boil.

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#8

Re: Car Radiator

04/05/2010 1:55 AM

Surprisingly, I was told to make sure there was a working thermostat in the system. With no thermostat, the water rushes around the circuit, and does not spend enough time in the radiator to get rid of the heat.

You can also look into finding a spare car heater. Install it on the heater hoses during the hot months, and have it somewhere it can get rid of some heat without bothering the people in the car.

Or you can rig up a duct to take the air from the heater that is already in the car and divert it away from the inside of the car. In the meantime, if the car overheats, just turn on the heater for a while to help the radiator.

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#16
In reply to #8

Re: Car Radiator

04/05/2010 1:18 PM

Mike, help me out here. I've heard the argument about the water moving too fast through the radiator before and still don't get it.

The original Ford V8 engine used from 1932 through 1953 and beyond, was often plagued with overheating. the same argument was offerred, to the point where some owners replaced the thermostat with large washers with various sized center holes in an attempt to restrict flow.

If the water moves too quickly to radiate heat from the radiator, would it not also move too quickly to absord heat from the block ?

Steve

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#17
In reply to #16

Re: Car Radiator

04/05/2010 3:38 PM

I think it's called 'contact time' or something like that. You would think the water moving slowly would have more time in the block to pick up more heat, probably does. I guess you would have to go through a thermodynamics class to get the real scoop. You have rate of change, temperature differential, and efficiency of exchange to consider. I just go on what the good mechanics tell me.

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#19
In reply to #16

Re: Car Radiator

04/05/2010 3:57 PM

The trick is, not to use washers, but to increase the volume dramatically of the radiator itself, that also slows the actual flow down through the radiator as well as cooling the water better.....

If a radiator is simply too small for the amount of engine heat produced, it will not/cannot cool the engine correctly.....it does not matter really how fast the water moves in such cases.....but with a large radiator, the higher water speed through the engine will cool better.....

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#9

Re: Car Radiator

04/05/2010 4:10 AM

Run your car heater on high. This will help cool the circulating coolant. Sorry about the excessive heat in the car.

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#10

Re: Car Radiator

04/05/2010 5:48 AM

A spray that blows clean water (distilled) over the radiator when temps are high.

Adding an extra radiator.

Adding extra/stronger 12 volt fans.

Turning off the motor when stuck in traffic, but leaving the electric fan on, this may need a larger battery (a good thing at any time) to work well.

Check motor timing carefully, a slightly over advanced ignition will dramatically increase the motor temperature, but "pinking" may still not be apparent....stuck weights on the advance and retard will give the same effect.....

Higher octane fuel.

Some of the suggestions are practical, some not!

Best of luck.

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#11

Re: Car Radiator

04/05/2010 8:12 AM

I suggest you to switch off engines during traffic jams, it will save fuel also keep your engine cool. I hope there is no starting engine again is problem in your car.

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#12

Re: Car Radiator

04/05/2010 9:18 AM

Peter asks what make and model of cars is it? Electric or mechanical fan?

I'd like to know too, so as to give you the best advice possible.

The other post are heading you in the right direction, but there might be something inherent in your machine that we're missing.

Cheers,

Stu.

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#13
In reply to #12

Re: Car Radiator

04/05/2010 9:29 AM

Yes it would be funny wouldnt it to discover he has an aircooled car, And the water he is topping up is from the windscreen washers

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#26
In reply to #13

Re: Car Radiator

04/08/2010 7:50 AM

sir , it is not air cooling system in my car,

It has a radiator.

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#14

Re: Car Radiator

04/05/2010 9:43 AM

Fit a HHF FUEL accelerator which makes any vehicle run cooler

Contact.

M.J.B.Miller

email

rellims44@gmail.com

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#18
In reply to #14

Re: Car Radiator

04/05/2010 3:51 PM

Don't bother advertising it here, the HHF FUEL accelerator has been proven to be a complete fake and the only real change it brings is that it empties your wallet quicker than it normally empties.

Nothing more, nothing less.

Its a 101 % con.....as all these fuel improvers are......but many (as the previous guest is for example), completely taken in......thats how con artists live, with money from suckers.

Whats the old saying? There's one born every minute!!!

How about "There's one born every second!!!" Thats probably even more true!!

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#20

Re: Car Radiator

04/05/2010 10:16 PM

Hi,

Probably all you need to do is keep the idle speed up. You may have to do that manually with your foot. As has been said, antifreeze will help. Another radiator the same size but with more sections could be a solution too.

-S

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#21

Re: Car Radiator

04/06/2010 1:05 AM

—Look up radiator cap and learn about the difference and complexities. Change your radiator cap every few years. (Also, before trying adding a reserve tank as suggested above, make sure your cooling system type (which essentially means the radiator cap type used) is compatible.

Secondly—and this is another thing overlooked by the majority of owners (and auto repair shops, too)—is to clean all debris (sand, dirt, dust, mud, insects...whatever) out of the radiator heat transfer fins (aka "coils") in order to allow the maximum air flow through the radiator—AC condensor fins and transmission cooler fins, too, if so equipped. Use compressed air and/or of water flush and direct flush both from grille side and engine side of radiator. While at it, straighten and open any bent/damaged fins. They make tools to do this very quickly (say, Harbor Freight) but a wee little flat blade screwdriver will work too, though not as quickly. How often ... depends on driving environment and habits. Typically one might check and maintiain the coils at least every 5 years, or at time of periodic flush and coolant renewal (2 - 3 years). With lots of stop-go driving in a congested, dusty place (?) like Pakistan it might be smart even more often. I would venture to guess that the greater majority of vehicles showing unexplainable loss of original cooling efficiencey (the gauge once showed normal or cool but now it shows extra warm to hot and sometimes with boil ups) will have cooling restored to "like now" simply by cleaning the cooling coils/fins. Many repair shops perform this service, but most will never mention it unless you the customer mentions it first. Car manufacturers count on neglect of radiator coils to elicit new car sales...so it's never in the owners manuals.

HOpe this helps.

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#27

Re: Car Radiator

09/20/2010 3:27 PM

MAKE IT INTO A BOMB, LIKE THE REST OF THE TOWEL HEADS.

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Andy Germany (3); Anonymous Poster (7); dvmdsc (2); lyn (1); mike k (2); Munawer Hussain (3); peterg7lyq (4); StandardsGuy (1); Stueywright (2); suresh sharma (1); TrevorM (1)

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