Wife said no heat on her side of floor. Yes heater core plugged. Drained antifreeze replaced with distilled water and drove 12 miles. repeated this 7 times and 10 gal distilled water. had heater core replaced and new antifreeze G13 filled. This was at 77,000 miles. Renewed heat on pass side. all ok. We took 3,000 mile trip to Mt. with no problems. Ran great. Had good heat. Until this weekend. I started out to drive and in 5 miles the temp gauge start climbing and did not stop until red line, The red lamp light on temp gauge was on. I stopped, engine of, rad fan was running on high. I checked coolant level, it was at max mark on expansion tank. Both heater hoses were cold. Top Radiator hose RH and LH hoses was cold. Drove in lower gear engine at 4,000 rpm. Had no heat from heater. After 4 miles heat returned from heater outlets. The temp gauge came down with no AC & no load on engine. Put in Drive and temp came back up. Only Red light was in temp gauge. No Check Engine Light. Returned home. Changed to different car.
Question can the engine get air lock? I have no loss of coolant. No heat from heater core outlets until I ran in lower gear at 4,000 rpm.???
Q Did the antifreeze crystallized and plugged heater core, also plug the EGR cooler, and Oil Cooler?
Q Do I need to replace EGR Cooler and Oil Cooler?
Q Is the water pump impeller plastic ? How do I test any of these?
Q Do the water pump have a problem?
Thanks for your help. Lloyd T
Question can the engine get air lock? I have no loss of coolant. No heat from heater core outlets until I ran in lower gear at 4,000 rpm.???
Q Did the antifreeze crystallized and plugged heater core, also plug the EGR cooler, and Oil Cooler?
Q Do I need to replace EGR Cooler and Oil Cooler?
Q Is the water pump impeller plastic ? How do I test any of these?
Q Do the water pump have a problem?
Thanks for your help. Lloyd T
