BEFORE getting involved in the major project of replacing the heater core, check the hose connections at the inlet and outlet hose connector tubes into and from the core. If these connections are the source of the leak, then it will not be necessary to replace the core. If there are signs of hose leakage, drain the coolant, disassemble the connections, clean the hoses and tubes well, and reassemble. Refill with coolant, run engine until it comes up to full operating temperature, cycle the heater on and off, all the while visually checking for leaks. At the same time, observe the area beneath the plastic plenum chamber for continued leakage. IF the inlet and outlet hose/tube connections are not leaking, but the leak continues, then the CORE IS LEAKING, and will have to be replaced.j3h.
probably just replace the coolant sensor
If it is noisy, leaking or not pumping sufficient coolant to cool the engine, replace it.
you have a coolant leak
Replace the engine coolant temperature sensor. Your car has two, replace the one with the 2 wire connector
You will have to replace the refrigerant, but not the engine coolant.
Replace your Engine Coolant Temperature Sensor. Your car has two, replace the one with the two wire connector
Engine coolant temperature switch/sensor
Replace your Engine Coolant Temperature Sensor. Visit Saturnfans.com for help in diagnosis
first, its not located in a conveinent loccation. It can only be accessed from underneath the car. And, because its on the bottom of the engine block, you will have to drain the coolant.
on the right side of the engine
No , the engine coolant will start flowing through the radiator when the engine coolant thermostat starts to open ( assuming everything is working properly ) Helpfull
Open the drain out valve at the bottom of the radiator to allow the coolant to run out. Replace the valve and add the fresh coolant.
The coolant temperature sensor can be found on the front of the engine, near the thermostat. Remove the coolant temperature sensor retaining nut, to replace it.
The radiator on a 1995 Saturn is flushed by draining the coolant, refilling the engine with water, and adding a flush. It is allowed to circulate and drain before refilling with coolant.
Start by replacing the Engine Coolant Temperature Sensor
Low engine coolant
Engine Coolant Temperature Sensor.
Dexcool, I just had to add coolant (reservoir was bone dry!) to a 2007 Aura
fill the coolant reserve and the light should go out
The 1999 Saturn engine uses dexcool type coolant. This coolant is different form other types and cannot me mixed with another type.
I believe it is on the block where your engine coolant runs into the block from the radiator. There should be two wires that run to a plastic-like sensor.
P0117 will set if the engine coolant temperature sensor (ECT) reads over 248F when the engine has been running for 10 seconds. replace your coolant temp sensor. the sensor is located in the drivers side of the cylinder head, just below the valve cover line, under the coolant hose.
If your heater core is LEAKING engine coolant so that your engine coolant level drops too low or the engine coolant is lost completely and causes your engine to overheat then your engine can be damaged beside the mess the leaking coolant makes inside your vehicle ( you might be able to just temporarily bypass the heater core so that no engine coolant is flowing through the heater core )
check/replace the engine coolant level sensor located in the engine coolant overflow reservior (located at the rear of the engine compartment pass. side)
The coolant temp sensor is located directly under the EGR valve, just in back of the upper radiator hose connection on the engine. The sensor has 2 wires and uses a 14mm socket to replace