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Old 09-02-2013, 08:26 AM   #1 (permalink)
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My 89 sidekick automatic 1.6 4wd in northern California. I'm having a problem with the temp is getting high, the hotter the day the hotter it gets quicker.
I like to see the gauge at the half way mark but it has gotten over 2/3 of the way and I want to know what I can do about it so I need some info.
I've replaced the thermostat but it still seems like the water boils over into the reservoir making it full decreasing the level in the radiator. If I don't add water or coolant every 3rd day time drive the overheating happen almost instantly when driving only 25-35 mph. I haven't found any leaks yet.
When I go from freeway speed 65 to 45 the needle will not move to anything cooler instead it moves hotter. To extreme temp when I have to idle at a stop light.
I have been trying to drive at night but I can't avoid the day time driving when dealing with business hours errands.
So with all that in mind, my question(s) are.....
Is the fan suppose to kick into a higher speed to help cool down the engine?
When you turn the car off, isn't the fan suppose to stay on for a short time, some sort of cool down cycle?
Can someone give me some good news?
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Old 09-02-2013, 09:28 AM   #2 (permalink)
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I don't know if yours has a fan clutch or not...my 98 does. If that clutch quits working the fan isn't driven anymore. It's temperature sensitive the hotter the fluid gets inside the clutch...the stiffer it gets and drives the fan harder.
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Old 09-02-2013, 10:04 AM   #3 (permalink)
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Quote:
When I go from freeway speed 65 to 45 the needle will not move to anything cooler instead it moves hotter
Any potential fan issues are negated at highway speed, as the vehicle movement is more than adequate to cool an otherwise proper cooling system.

Since you've replaced the thermostat, I'd suspect a fouled radiator. How old is it and what is the apparent internal condition as viewing through the fill opening?

New rads are rather inexpensive.
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Old 09-02-2013, 11:54 AM   #4 (permalink)
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No, the fan is not electric - it runs only when the car is running. Presumably you have checked to see that yours is on. And as Max says, when you are on the highway, the air from traveling should keep the car cool. You most probably should start by flushing the radiator and the cooling system to make sure that nothing is blocked up and that the coolant can move freely. The stock thermostat for the car is normally 180F or 195F - which did you put in? And you should confirm that your radiator cap is 0.9 bar (13 psi).
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Old 09-05-2013, 03:40 AM   #5 (permalink)
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To Max- I've had the truck since March 2011. So I don't know how old it is. Also I don't know if any work has been done on it since I've owned it because I wasn't the one working on it. When looking inside the coils have a rosey color if it has been driven a few hours prior but checking today 16 hours after driving it the coils have a greenish gray color. No rust or corosion.

To Bex- The cap says 13lbs and the thermostat was replaced with the 180.

If I maintain a speed of 40-45 mph on a hot day the flow of the air while driving does do the job if I don't have to stop at every block just as the light is turning red. But if I drive on the freeway even 2 miles at 65 mph and have to drop to 45 mph, during workday traffic conditions, the air flow does nothing. Even when I have the heat on high I can't stay moving long enough to bring the heat down.
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Old 09-05-2013, 04:53 AM   #6 (permalink)
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You should first try to flush your entire cooling system and radiator, to see if there is a blockage. Be very careful with overheating this engine - aluminum block warps and then you are into headgasket damage, which isn't pretty or cheap. Personally, I wouldn't drive the car until you resolve this issue.
Testing fan clutch here:
http://www.suzuki-forums.com/suzuki-...an-clutch.html
System flush here:
How to Flush Your Car's Radiator and Change the Antifreeze
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Old 09-05-2013, 07:59 PM   #7 (permalink)
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Thanks for the links and advice. Coming from people who know personally about these type of trucks is much better than getting the guesses from my friends. Thanks again.
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Old 09-05-2013, 08:13 PM   #8 (permalink)
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Wait. A lot of things still aren't clear.

1.) It overheats above 45mph?
2.) Does it cool down below 45mph?
3.) Does it cool down sitting stationary at idle?
4.) If there are any grades in your route, does the temperature drop when going downhill at all?
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Old 09-06-2013, 05:42 AM   #9 (permalink)
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Also check the radiator fins, make sure its not full of debri., must be clear for sufficient air flow. Also make sure the water pump is pumping, circulating the coolant,. Once the car is at temp, and thermostat should be open feel the upper hose it should feel soft, if hard coolant isn't circulating. Check weep hole on pump for any sign of weeping. If pump is weeping, need new pump.
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Old 09-06-2013, 08:19 AM   #10 (permalink)
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did you test the cap or just read what was stamped/painted on it? they do wear out over time...
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