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?
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).
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.
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?
'88 Samurai - Rust Belt survivor.
'00 Tacoma - Lots of miles and counting.
'68 Mustang - Gas-guzzling toy...fixing the gas-guzzling part.
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.
And make sure that the little air hole in the thermostat is facing the radiator.....If you do flush the system, make sure that you 'burp' it - remove all the air in the system. An airlock anywhere can cause overheating as well.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.