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Radiator cap is cool to touch after driving - Diamante Mitsubishi Cars & Trucks

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In the winter time thats is not uncommon,just be sure there is still plenty of coolant in the system.

Posted on Jan 06, 2013

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Posted on Jan 02, 2017

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SOURCE: Temp gauge goes into the red while driving then

your thermostat is not opening there for not allowing hot coolant to exchange into the radiator. replace thermostat.also causing you to overheat

Posted on Jan 17, 2010

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SOURCE: 1989 chevy 4.3 liter V6

Hi. A lot of work has been done with the engine. I guess all was left is the head gaskets. Try replacing the head gaskets. I provided you a link for better understanding. Please click here.

Posted on Sep 21, 2010

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My 2002 buick century overheats and has no heat

Possible trapped in system. Bleed system, should have two small screw bleeders, one in front of left valve cover on pipe behind water pump and the other on coolant pipe outlet as you follow upper rad. hose towards engine. Engine cool, remove rad cap, open both bleed screws and fill rad until coolant flows free out both bleed ports. close both bleed screws, rad cap off, start engine and let idle until upper hose is hot to touch , shut off, let it cool down for 20 minutes, top up rad and install cap. restart car ,drive and check.

Jan 02, 2014 | 2002 Buick Century

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2001 Chevy Lumina. Got hot, pulled over. Reservoir was boiling over but radiator cap was cool to the touch. Let it cool off. Check water in radiator and reservoir, needed very little. Started driving and...

Sounds like your thermostat is sticking closed at times, not allowing coolant to circulate through the radiator for proper cooling. Replace thermostat.

Mar 01, 2013 | 2001 Chevrolet Lumina

2 Answers

Fuel line burst causing fire ever since car keeps over heating and now its blown the head help please!!! I can fix the head but need any ideas on whym its overheating checked the thermostat it fine no...

Check that the fan is working properly, whether it is electric or a belt driven fan. A car will overheat if the fan doesn't function as originally designed.

Nov 04, 2011 | Cars & Trucks

1 Answer

Depressurize the radiator of a 2005 Buick LeSabre. I would like a detailed diagram of how to do it along with instructions. Thanks.

Simply shutting off the vehicle and waiting till the engine cools down will depressurize the cooling system once the engine has cooled for half an hour to an hour or so turn the radiator cap slowly till it releases any remaining pressure. If the cap is to hot to touch or you can not hold onto it for long enough to open it than the engine is too hot yet and needs to cool longer.

Jul 23, 2011 | 2005 Buick LeSabre

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Cooling system

You still have air trapped in your cooling system, turn the heat to full and remove the radiator cap with engine running, Make sure you remove the radiator cap before you start the engine, once the engine has reached it's operating temperature and there is heat coming from the vents. Top off radiator till full and place the radiator cap back on with engine still running only on the first click, make sure the coolant over flow tank is at proper level and go for a test drive with the heat still on hottest setting. (roll the windows down).
Ofter test drive 5 min to 10min, with engine still running close off the radiator cap to the second click. Tank note that the cap may be to hot so use a rag and caution not to burn your self.
This should get any air in the cooling system out, any air in the system may cause the system to burst since the air will try to escape any week spot. That's why we only close the radiator cap to the first click to prevent any additional pressure that can cause a leak from the hot air.
Thank you for using fixya and be safe.

May 13, 2010 | 2002 Chevrolet Blazer

1 Answer

The water boils over and the car overheats within 15 mins of driving it is a suzuki vitara i just want to know is it head gasket or is it thermostat?

Look at the coolant and the oil. If either one has the other mixed into it, it is probably the head gasket. If not, it mat still be the head gasket but try this first: Check the car visually for any cooling system leaks. Make sure that the overflow tank tube is not obstructed and the tank itself is not cracked or leaking and the that the cap is in good shape. With the radiator cap off, start the car and let it run, top off the radiator with coolant as necessary. Grab the upper radiator hose every minute or so while monitoring the cars temp. gauge also. The hose should warm up slowly if the thermostat is working and eventually become solid to the touch from pressure. Once it opens, bring up the rpm of the engine(1500 to 1800 rpm) while you top off the cooling system, install the rad. cap THEN let the idle drop down. Feel the upper hose for air bubbles. If they are present, shut the car off, let cool and repeat the process. You may have air bubbles in the system, test and/or replace the radiator cap before you test the system. I hope that works for you.

Apr 27, 2010 | 1999 Suzuki Vitara

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Temp gauge goes into the red while driving then back down to normal levels. Pulled over and checked the coolant level. Overflow was half full and the radiator cap was cool to the touch.

your thermostat is not opening there for not allowing hot coolant to exchange into the radiator. replace thermostat.also causing you to overheat

Jan 17, 2010 | 2002 Pontiac Montana

1 Answer

Air in cooling system

Make sure the engine is cold and and remove the radiator cap. Top off the radiator and coolant recovery tank. Put the cap on the recovery tank but leave the radiator cap off. Start the engine. Monitor the temp. gauge about every 20 seconds. Carefully grab the upper radiator hose in 90 second intervals and very gently squeeze it a few times to help release the trapped air.The coolant level should drop visibly into the radiator as the thermostat opens. Now bring the rpm up to about 1800 and HOLD it there while you top off the system and then tighten down the radiator cap completely before you drop the engine rpm. I recommend using a friend to help with this procedure. Then let the car run as you check for the upper hose to feel warm and solid to the touch. Watch the gauge. The reading should be steady. If it starts to overheat, shut off the engine and wait for it to cool down. Repeat the procedure if necessary

Jul 01, 2009 | 1994 Mitsubishi Diamante

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