itgrowsind

My car is a 1992 es300. Its been overheating lately and was recently told by a mechanic that it was because of my power steering hose. Which had a Leak. They said the problem was because I have a hydraulic fan and the hose from the p/s runs into it, and becuase i had a leak was causing it not to work properly and at full capacity. So i had it fixed yesterday and my car still started to overheat. I dont know what the problem is but id really like to does anyone have any suggestions what might be causing my vehicle to overheat? I only run the a/c at the lowest level, as soon as i turn it off the overheating still persist jsut not as quick.

CUMan

I recently had a similar problem with my 94 ES, which has the same hydraulically-operated cooling fan. My car would stay cool as long as it was moving; however, when it was stopped in traffic, it would overheat.

The problem turned out to involve the cooling fan solenoid, which is a part of the power steering pump. This solenoid has an electrical connector which signals the solenoid when the coolant temperature reaches a certain level. The solenoid then causes the power steering pump to increase the power steering fluid flow, which, in turn, speeds up the cooling fan.

There are several things to check. First, make sure the electrical connection is plugged into the solenoid. Second, the solenoid condition can be checked with a multi-meter by bridging connections 2 and 3 in the connector which attaches to the cooling fan computer. This computer is located under the glovebox. You have to pull back the plastic panel underneath the glove box to see it. When you bridge these two connections, you should get a resistance value of 7.6-8.0 ohms when the car is cold.

If the solenoid check gives a different reading, it is probably defective. The solenoid is Lexus and Toyota part number 16929-62020. It costs $101.72 at www.newlexusparts.com. This includes shipping. This same part is used on 92-95 Camry v-6 models, and you might find it cheaper at Toyota dealers. The price was $91.91 at www.toyotaworld.com; however, shipping charges are extra.

3000

Did the mechanic state whether it was the power steering hose, or the HIGH PRESSURE power steering hose?

Pheonix

Werd. Just bridging OP1 & E1 can tell you alot about the hydraulic fan.

spooksh13

I have the sameproblem with my 93 and because i could not figure out what it was on time my head gasket blew . now i have to take my heads out have them redone and get a new gasket and put them back on. Which still doesnt solve my over heating problem.But a few days b 4 my head gasket went out me and some of my buddies at work figured out that the motorin the fan wasnt running as fast as it should.hydraulic fans are supposed to run faster when u hit the gas but when we pulled the throddle the fan did not spin any faster . soi pretti much think it might be a relay or something. so u migh want that checked out.

Pheonix

The throttle has nothing to do with how fast the hydraulic fan spins.