1994 Lexus ES 300 Overheating!

MAGANAIVAN

MEMBER
1994 LEXUS ES 300
V6
AUTOMATIC
216,000 MILES

I have a 94 Lexus Es300 that over heats in about roughly 10 to 20 minutes. I've noticed my hydraulic fan dosen't run at all! I gave it a spin by hand see if it was free well it felt fine. I thought it was the pressure line house which runs from the power steering pump to the radiator. I replaced it nothing still. I replaced the the thermostat nothing either. Although when I took out the thermostat it had like trash on it. I flushed out my coolant truly enough it was dirty. Still nothing. My radiator starts right up when I turn the engine, but slowly comes to a stop and never runs again even if the temperature gets HOT! PLEASE HELP ME IT'S DRIVING ME NUTS

5 Replies

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

Are the fans you are referring to electric and not hydraulic? Also, if you are at highway speed, does it over heat?

Was this

answer

helpful?

Yes

No

Tuesday, August 12th, 2014 AT 4:18 PM

MAGANAIVAN

MEMBER
3 POSTS

@Jacobandnickolas My fan is hydraulic. I run it on the local streets for about 10 to 20 mins. The fan starts up but very slowly then starts to fade out, slowly until it comes to a complete stop never runs again even if the tempature is starting to rise.

SPONSORED LINKS

Was this

answer

helpful?

Yes

No

Tuesday, August 12th, 2014 AT 4:34 PM

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

Most likely the coolant temp sensor is bad. Although the fan is hydraulic, it is actuated electrically.

Was this

answer

helpful?

Yes

No

Tuesday, August 12th, 2014 AT 5:26 PM

MAGANAIVAN

MEMBER
3 POSTS

I forgot to add that I changed that also it looks like a bolt that goes underneath the radiater cap well near it. It didn't change anything either dude! I think it's the engine computer. What else could it be?

Was this

answer

helpful?

Yes

No

Tuesday, August 12th, 2014 AT 5:35 PM

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

Take a look at this:

file:///C:/Users/Joe/Downloads/94%20cooling. Pdf

There should also be a solenoid mounted on the side of the PS pump. The solenoid mounted on the steering pump controls how much hydraulic fluid gets to the fan motor. Check that too.