Water pump replaced on my Lexus RX 400h ...and a few days later radiator died

Asked by Aug 11, 2015 at 02:24 PM about the 2006 Lexus RX 400h AWD

Question type: Maintenance & Repair

I had the water pump replaced on the hybrid engine as part of a routine 90Kservice and
within a few days my radiator was gone. Service center says they are not related!!! Please
advise.

2 Answers

104,055

They are related in the sense that there in the same system, they are both parts help keep the car from over heating. If you are asking if the pump caused the radiator to go, then the answer would be no. I think it was on its way out, that's why you were having the 90k service done. I think it should have been replace then...

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395

Lmost same thing happened to my lexus 400H. After they changed the timing belt and water pump, I discovered a hairline crack on the upper side of the radiator. Whenever I filled the radiator it leaked out.Finally I decided not to fill it anymore. So I kept it the way it is, but kept a gallon of anti freeze in the car. It has been 5 years. It has not over heated even in the hottest summer with a/c on and plenty of heat in the winter. But I think it had a tow package which means bigger radiator? At 151K it is still running like a champ. What I am wondering when the Hybreed battery dies, will it run on its own gasoline engine? Common sense says it should. Does anybody has any idea?

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