Question about Cars & Trucks
There are probably several possibilities:
- bad head gasket - this could pressurize the coolant system when the engine is hot.
- Bad radiator cap - if the rubber gasket is broken or the spring has failed, or even if the cap has not been tightened all the way, it could let coolant escape.
WORK SAFE - hot engine coolant can BURN. Only mess with the radiator cap when the engine is cold, and even then, it is a good idea to put an old towel over it when you remove it.
Posted on Mar 30, 2015
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Posted on Jan 02, 2017
SOURCE: Honda Civic LX 1995, replaced
First check for the rad fan working. It could be the Fan relay, bad ground connection or coolant temp sensor (commands the fan relay). If not, check for little tiny bubbles in the coolant. Do this by running the vehicle with the rad cap off. Make sure there is no pressure in the cooling system first or you will get burned (squeeze rad hose, should be cool and easy to squeeze). Look into the top of the rad and watch for these tiny little bubbles. If they are present, you will need a head gasket.
Posted on Jul 22, 2008
1997 Plymouth Neon, have replaced radiator, radiation cap, thermostate and hoses, still run hot. Fans do not seem to come on, where is the temperature sensor on this vehicle?
Posted on Sep 03, 2009
These fans should turn on at about 220 degrees, give or take a couple, and then turn back off at about 210 degrees.Fans should also come on when engine is idling with the a/c on [provided the a/c works of course] If the fan[s] isn't running and the gauge is over about 3/4 of the way or will go all the way to the end then odds are your fan's aren't capable of working for some reason. The classic symptoms of a cooling fan not working are what you are describing: Cools fine at highway speeds, overheats at slow speeds. I would start by checking the cooling fan fuses located in the underhood fuse panel. I believe they are marked Cooling fan 1 and Cooling fan 2 and both should both be 30 amp fuses. If the fuses are good then you might have problems with the fan motors themselves. Hope this helps you get it working again!
Posted on Jul 15, 2010
SOURCE: The cooling system in my
This sounds like a blown head gasket. You can purchase a kit that when used per the instructions you will know for sure
that it is a blown head gasket. You might try some of the sealers that are on the market but I do not back any of these half way fixes. I was a professional Cadilliac Technician for over 30 years. FIX IT RIGHT THE FIRST TIME
Posted on Sep 01, 2010
SOURCE: 2003 Lincoln LS V8 3.9.
I dont think the coolant is boiling, I think you have an air bubble in your system wich is causing a air lock and youll need it flushed out. Your reservior cap should be tight always.. never loose this is an air tight system and your allowing it to get air in it. I have a 2002 linc ls and just had to pay 1000.00 to replace the system because I let an air lock go for too long and had so much back pressure I blew up my reservior.
Posted on Sep 12, 2010
Testimonial: "Thanks a lot. I've changed the coolant reservoir and reservoir cap. now it seems everything is ok with my car. so, your advise was really helpful."
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