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did you instal the thermostat the right way
for the leaks pressure to 16psi again and start the engine
it could be a water pump seal which leaks with the pump running
check weep hole under poump
Check the thermostat. It keeps the cooling water in a small closed circuit till the engine is warm. Then it should open to send the water to the radiator and the heating system.
Fine the engine is heating and you say leak under van. What is the leak, is it water/ coolent/ oil or what?
is it possible to know where the leak is coming from?
It sounds like the heater matrix leaking,usually the dashboard has to come out to get to it.keep an eye on your engine water level too as its the same water and coolent that runs the a/c.if its leaking into the car then you risk over heating the engine.
REPLACE THERMOSTAT AND RADIATOR PRESSURE CAP.IF CAR OVER HEATING WHILE IN MOTION.MORE LIKELY ITS THE THERMOSTAT,LOW COOLANT IN RADIATOR OR COOLANT SYSTEM,BAD WATER PUMP,WATER PUMP WEEP HOLE IS LEAKING, WATER PUMP NEEDS REPLACING.CHECK ENGINE OIL,IF OIL LOOKS LIKE MILK SHAKE YOU HAVE LEAKING HEAD GASKET.IF CAR IN PARK AND OVER HEATS WHILE IN A LONG TRAFFIC LINE OR.BANK DRIVE THROUGH COOLANT FAN NOT TURNING ON, BECAUSE THE ENGINE COOLANT TEMPERATURE SENSOR FAULTY.CODE SCAN CAR FOR FAULTY COOLANT FAN RELAY OR FAULTY PCM. CHECK COOLANT FAN FUSE, AND HOT WIRE THE COOLANT FAN TO MAKE SURE ITS WORKING.IF COOLANT FAN DONT WORK WHEN HOT WIRED. COOLANT FAN NEEDS REPLACING. REPLACE BOTH RADIATOR HOSES, REPLACE THERMOSTAT AND RADIATOR PRESSURE CAP.BUY NEW COOLANT ADD 50/50 WATER AND COOLANT.IF ENGINE OIL HAS ANTIFREEZE IN IT.REPLACE ENGINE OIL AND OIL FILTER TO KEEP FROM LOCKING UP THE ENGINE.GET CAR FIX.DONT KEEP DRIVING IF IT KEEP OVER HEATING,ENGINE DAMAGE WILL OCCUR.I HOPE INFORMATION I GAVE YOU WILL FIX PROBLEM.PROBLEM COULD BE LEAKING RADIATOR HOSES BUT CHANGE THERMOSTAT THATS FIRST THING I WOULD CHANGE BECAUSE IF IT CLOSED, ENGINE WILL OVER HEAT AND CRACK CYLINDER HEAD OR CRACK PISTON, COOLANT NEED TO CIRCULATE THROUGH THE ENGINE TO TAKE AWAY THE HEAT FROM ENGINE.
if your car keeps over heating, then it means the fan blowing the radiator is weak or might not be working at all.
Also, your water pump might be damaged, which can cause it to leak water. Put water into the radiator and check under the car to observe if there would be any leak of water.
Make sure the above is checked and fixed because thing overheating problem can damage your gasket which can make your can engine to knock.
Water as to be leaking from somewhere which is making the car overhear frequently.
This could have several causes. Is the coolant tank full? Is the coolant relatively fresh and a 50/50 mix of water and antifreeze? Does the heat gauge jump up to hot and then fall back rapidly at some point or just rise and keep climbing? If so, it is the thermostat. Is there a leak evident under the car? If so, it could be a bad water pump. The water pump has a small weep hole and if there is water at that point the pump needs to be replaced. If none of this is the cause, then it could be a plugged radiator or a faulty cap located on the radiator or the coolant overflow tank.
DO NOT RUN THE CAR WITH NO WATER,water has to be present in the reservoir to enable the output of heat from the heaters. switch the engine off put water in the reservoir/antifreeze look at the bottom of your engine, see if there is a leak, ifnot fill water on to correct level, close cap, turn engine on, check for leak under the engine, if not when engine reaches optimum temperature, your car should give out heat. after an hour check level of water in reservoir. if it has totally depleted or decreased by a significant amount then, go straight to the mechanic and tell him your observations, it could be your HEAD GASKET, if it is then start saving
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