Overheating issue

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Dec 11, 2013 | 08:54 PM

alladien

Thread Starter

Driver School Candidate

Joined: Nov 2013

Posts: 16

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From: Texas

Overheating issue

I have a 1998 Lexus es300 and when I drive the temperature gauge is showing the needle in the middle which is good but when I come to a light I notice the needle rising to high but when I start driving again it goes back down to normal temperature. Also when I am parked and the car is running same thing, temperature starts rising. Any ideas on what it could be?

Thanks

Dec 12, 2013 | 05:39 AM

brucelee1

Racer

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Joined: Sep 2007

Posts: 1,416

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From: MA

Can you observe the fan running when the car is idling and starting to get hot? If should be and if not, that may be your issue, the fan is either dead or the sensor is.

If the fan is running, you then looking at the rest of the system. I assume you have checked the coolant level and quality? Dirty or low coolant is a real issue and needs to be addressed. Might be time for a flush.

After that, you are looking at radiator issues or the thermostat.

Good luck.

Dec 12, 2013 | 07:02 AM

BDSL

Lexus Test Driver

Joined: Sep 2007

Posts: 1,239

Likes: 15

From: Ontario

- faulty thermostat
- clogged plumbing
- faulty radiator

Dec 12, 2013 | 09:53 AM

PFB

Lexus Champion

Joined: Oct 2009

Posts: 1,841

Likes: 48

From: Montreal, Canada

Everything that was said so far, but could also be a faulty radiator cap.

Phil

Dec 12, 2013 | 12:18 PM

LeX2K

Lexus Fanatic

Joined: Sep 2010

Posts: 26,076

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From: Alberta

Yep check the basics and report back.

Dec 12, 2013 | 03:50 PM

moonphase

Driver

Joined: Jan 2013

Posts: 158

Likes: 2

From: NM

Also check for severe bug denting to the AC condenser fins in front of the radiator that would block air flow to the rad. Also shine a strong light through the rad and see if you can see the light from the front to check for bird feathers, etc that made it through the condenser and are blocking the radiator.

Dec 14, 2013 | 08:53 PM