Question about Lexus ES 300
How was this radiator cleaned? The only way to really clean a radiator is to get the end pans off, which on an aluminium radiator such as yours is nigh on impossible to get it sealed properly again. Did you flush the engine as well? Get the thermostat out(again) leaving the housing open. Both radiator hoses disconnected. Stick a hosepipe in there and let rip. Run the water till clear. Now stick the hosepipe in the other opening and repeat. Do this until there's no mre shale and rusty water exiting the engine.
Now : Do the fans start when the engine is idling(and hot) and the vehicle stationary? If not. Make sure the fan is working. You can do this by connecting 2 wires straight from the battery + and - to the fan(Dont worry about which way round. This is a DC motor. It will just turn in the wrong direction with polarity reversed). If not, replace fan.(again, yes I saw you'd replaced it already, bummer) If it works proceed to the next step.
Locate the fan thermo switch. It sits low down on the radiator on the end pan. Looks like a large brass(sometimes aluminium) nut with 2 wires connected to it. If you short out(connect to each other) these 2 wires(ignition on) the fan should come on. If not, replace the thermo switch. If after replacement the fans still do not come on(engine hot, vehicle stationary) the wiring may be faulty. Run a wire from battery + to one tab on the thermo switch. Another wire from the other tab on the thermo switch to the fan and yet another from the fan to the battery - or other suitable earth point on the bodywork of the car. To be safe wire a 15A fuse between the battery and thermo switch. Solved? No ? Move on
Remove the thermostat altogether. Solved? Yes? Thermostat is faulty. Replace(Again) No?Move on.
Replace your radiator. It is still clogged. You may try to flush it again but once pieces of shale have lodged themselves in the little pipes in the radiator theyre there for good.
Posted on Jul 27, 2010
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
Jul 19, 2012 | 1988 Mazda B2200
Aug 06, 2011 | 1997 Honda Civic
Mar 01, 2011 | 2001 Pontiac Firebird
Oct 14, 2010 | 1994 Saturn Sc
Jul 09, 2010 | 1992 Lexus Es 300
May 19, 2010 | 1992 Lexus Es 300
May 05, 2010 | 1999 Oldsmobile Alero
Jan 30, 2010 | 1997 Chevrolet Cavalier
Jun 10, 2009 | 1991 Lexus ES 250
Jun 02, 2009 | 1994 Chevrolet Silverado 2500
113 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: