Thermostat or radiator

Asked by Phillip Apr 30, 2020 at 10:08 PM about the 2008 Lexus RX 350 AWD

Question type: Maintenance & Repair

When driving I just notice the thermostat
needle go up to the red when I accelerate in
go down to the midpoint ont the reader when I
take my foot of the gas need to know is this a
thermostat issue or radiator issue

2 Answers
70

Notasheep answered 4 years ago

Next time it does it ck the upper and lower radiator hoses. If one is hot and other is cooler, test the thermostat. Pull it out, boil some water, place it in and see if it opens and closes then when removed. If not, change it.

Mark helpful

GuruM9SS9 answered 3 years ago

are you sure that the radiator is full of fluid? dont just rely on the overflow bottle. with the engine cold, take off the radiator cap and make sure.

Mark helpful

Your Answer:

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