Question about Cars & Trucks
Shortly after blue water temp light goes out and engine beginds to warm up, red blinking low coolant level light comes on. Shortly thereafter coolant expands and over flows from expansion tank. Does not show overheat light. Changed thermostat,coolant expansion tank, and coolant temp sensor. Added compatible coolant. Still have blinking low coolant level light. What next, water pump even though it shows flow from the top hose of the expansion tank????
Not the pump but air in the system or a broken wire to the coolant level sensor
that sensor at the top of the radiator tank has to be completely immersed in coolant or the circuit is broken and the light comes on
same effect id the wire to that sensor is broken in the insulation
Posted on Jun 16, 2017
SOURCE: overheating problem
water pump. water pump. water pump. i am a vw dealer tech and on 2.0 and 1.8t beetles the water pump impeller is plastic, and what happens is usually another component, fans, fan control module (under battery tray), thermostat, fails and because the impeller is plastic with just one overheat the plastic becomes brittle and shatters, pull the water pump out and you will see the impeller in 3 or 4 pieces. replace water pump and make sure t stat opens, fans come on (a/c off) and proper water pump flow.
Posted on Nov 10, 2008
SOURCE: OVER HEATING
In the fan circuit...You have a temp switch screwed on the radiator, a fuze and a relay in the fuze box plus a fan. Swap the relay with another relay, replace the fuze. The other fan should come on when the a/c is turned on. If you fix the fans and it still overheats, you may have a BLOWN HEAD GASKET. ALSO ARE YOU BLEEDING THE AIR FROM THE SYSTEM? DO YOU SMELL EXHAUST IN THE COOLANT?
Posted on Mar 12, 2009
SOURCE: overheating problem
looks like you have done everything but the problem with your car is that the cylider head gasket has gone have a look at the dipstick or remove the oil filler cap if it looks like mayo then 100% head gasket has failed you said no water on the floor so it must have gone into engine only way this can happen is head gasket failing, if you have put lot of water in to the cooling system then your sump will be full of oil water mix.
let us know your findings so we can help you more if you need it
Posted on Apr 22, 2009
Manual states that when the fluid is cold it will show up blue then as it wanrms up it goes away. a normal function. It's in the owner manual somewhere.
Posted on Aug 12, 2009
The hose is an over flow drain. If you've seen no signs of leaks then most likely your radiator cap is bad. The cap helps to pressurize the cooling system, if it is bad it allows to much coolant out to the over flow tank and the extra is dumped while your driving. When you turn off your engine the fluid is drawn back into the radiator and your coolant mysteriously disappears.
Posted on Jun 26, 2010
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