1992 BMW 735 Repair Question
Asked on April 7, 2010
1992 BMW 735 ENGINE OVERHEATING AFTER REPLACING RADIATOR AN
Engine Cooling problem
1992 BMW 735 6 cyl Two Wheel Drive Automatic 210000 miles
THE ENGINE OVERHEATED WHILE DRIVING.INSPECTION REVEALED A LEAKY RADIATOR . IT AND THE THERMOSTAT WERE REPLACED. AFTER ADDING COOLANT THE ENGINE IS STILL OVERHEATING, IT APPEARS THERE IS AIR IN THE LINE. I OPENED THE BLEEDER SCREW TO ALLOW IT TO ESCAPE AND START A STEADY TRICKLE OF COOLANT. BUT I AM STILL GETTING AIR AND IT IS STILL OVERHEATING. HOW DO I GET THE AIR OUT OF THE SYSTEM ?THE COOLANT DOES NOT APPEAR TO BE CIRCULATING
1992 BMW 735 6 cyl Two Wheel Drive Automatic 210000 miles
THE ENGINE OVERHEATED WHILE DRIVING.INSPECTION REVEALED A LEAKY RADIATOR . IT AND THE THERMOSTAT WERE REPLACED. AFTER ADDING COOLANT THE ENGINE IS STILL OVERHEATING, IT APPEARS THERE IS AIR IN THE LINE. I OPENED THE BLEEDER SCREW TO ALLOW IT TO ESCAPE AND START A STEADY TRICKLE OF COOLANT. BUT I AM STILL GETTING AIR AND IT IS STILL OVERHEATING. HOW DO I GET THE AIR OUT OF THE SYSTEM ?THE COOLANT DOES NOT APPEAR TO BE CIRCULATING
Answer
Replied on April 7, 2010
There is a bypass hose from the radiator up to the expansion tank, if it is clogged, you will not get all the air out. Check this link, it's #5 : http://www.realoem.com/bmw/showparts.do?model=GB43&mospid=47359&btnr=17_0001&hg=17&fg=05