Question about Cars & Trucks
No coolant makes it to the expansion tank - no obvious leaks - relatively new radiator & cap - didn't work before either
Check the hose going to the expansion tank, That it is not pluged up.
Posted on Nov 04, 2012
The tank should have a full cold mark and a full hot mark. When checking the coolant, always fill the recovery tank to at least the full cold mark- the lower marking on the tank. As engine coolant gets hot it expands and should transfer into the overflow tank. Then when the engine and coolant starts to cool down, the radiator should siphon the coolant back into the radiator to keep it full. Check for restrictions in the hose from the radiator to the tank. When engine is cool, top up the radiator and the recovery tank.
Posted on Nov 04, 2012
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
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
when you say left side are we talking passanger side or drivers side if drivers side which is my guess most likely your waterpump seal is leaking
Posted on Mar 22, 2009
The water (coolant) in the expansion tank will rise and fall with the engine temperature. What the expansion tank does is collect and return coolant to and from the engine. When the engine warms up the coolant gets hot, builds up pressure and opens up the radiator cap. The coolant then goes into the expansion tank. Now when the engine cools down the pressure drops in the cooling system and the pressure drop (vacuum) pulls the coolant back into the engine via the radiator cap. The radiator cap allows the cooling system to build up pressure and by doing so increases the boiling point of the coolant, but when that pressure exceeds the caps rating the cap opens and the coolant goes to the expansion valve. The cap has another part to it that when the engine cools down and a partial vacuum is created in the cooling system a "valve" in the radiator cap opens and allows the coolant to be drawn back into the engine. I would look at your radiator cap to see if any gunk or build up is on it, and check the rubber gaskets for cracks. It's easiest just to replace the cap because they are inexpensive and easy to replace (2-10 dollars). The expansion tank should have two hoses on it. The one on the bottom comes from the radiator and the one on the top (possibly part of filler cap) runs down and is open to the ground. That way if it is overfilled or becomes overfilled it will slowly leak onto the ground. When and if you change your radiator cap, make sure the engine is cooled down, remove cap and start engine and turn heater to full blast, full heat. Leave the cap off and let it run until engine warmed up. This should burp out any air pockets that may have happened when coolant was changed. Also top off the coolant in the radiator while it is running. Hope this helps and good luck
Posted on Apr 03, 2009
SOURCE: Expansion tank
Yes these can become distorted or malformed through repetitive overheating. They are made of rather thick plastic so it does make them resilient to warping but not impervious. I can not say that it can weaken the cap, but I can say that constant boil over can not be good for it.
Posted on Jun 06, 2009
Tips for a great answer:
Oct 30, 2011 | Cars & Trucks
Jun 10, 2011 | 2001 Cadillac DeVille
May 09, 2011 | Oldsmobile Alero Cars & Trucks
Jul 05, 2010 | 1985 Mazda RX-7
Jan 30, 2010 | BMW 330 Cars & Trucks
Oct 20, 2009 | 1996 Volvo 960
Sep 01, 2009 | Mitsubishi Passenger Cars & Trucks
Jul 08, 2009 | 1995 Lincoln Continental
Apr 03, 2009 | 1992 BMW 3 Series
211 people viewed this question
Usually answered in minutes!