Engine overheats

WHITING2416

MEMBER
2002 TOYOTA ECHO
1.5L
4 CYL
2WD
AUTOMATIC
280,000 MILES

Car overheats only when I turn on the A/C or driving on the interstate.

Monday, March 7th, 2022 AT 3:30 PM

3 Replies

JACOBANDNICKOLAS

MECHANIC
109,758 POSTS

Hi,

The idea that it overheats at highway speed is odd. Is the engine coolant full in both the overflow reservoir and radiator? Have you tried replacing the thermostat? Also, when you turn the A/C on, the cooling fan should turn on. Is that happening?

Let me know as much as you can. Also, take a look through this link. You may find it helpful.

https://www.2carpros.com/articles/engine-overheating-or-running-hot

Let me know.

Take care,

Joe

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Monday, March 7th, 2022 AT 7:13 PM

WHITING2416

MEMBER
22 POSTS

Sorry for the delay. I pulled the radiator cap. It's definitely low if not empty. Going to check that out next week when I return from my trip. I'll let you know if that's it. Thank you.

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Wednesday, March 9th, 2022 AT 7:32 PM

JACOBANDNICKOLAS

MECHANIC
109,758 POSTS

Hi,

I had a feeling that was the issue. Once you fill it, the overheating will likely stop. However, we will need to check if there is a leak.

Let me know if there is evidence of a leak, anything that appears to be mixing with the engine oil, or if there is excessive white smoke coming from the exhaust.

Take care of yourself,

Joe

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Thursday, March 10th, 2022 AT 4:51 PM