Did you torque the head bolts in the proper pattern? Sounds like your head gasket is leaking.
SOURCE: I have a 1993 Lexus ES 300 that has overheated and
Bad news, I had this happen once to my daughters Volkswagen Jetta, I replaced the head gasket and had the same symptoms you describe. i wound up having to take the head back off and took the gasket back to where I bought it and compared it to a new one and discovered that the holes in the one I had put on didn't match up with the new head gasket. The auto parts store gave me the new Head gasket at no charge because the other one was defective.
However hopefully this isn't your problem, it could be something as simple as a defective thermostat that just isn't opening after the engine reaches the correct tenperature. Check this first before tearing back into the engine.
SOURCE: my 95 es300 got overheat
Hi. If your getten warm heat but not hot, ITs most likely your thermostat which can cause your car to overheat.
SOURCE: Can you please tell me where the thermostat is
This is the most likely place as this is the case for most cars.....
SOURCE: 1993 lexus es300 over heating,
First of all, if your head is cracked or a gasket is blown, the car will run very poorly. But you can check for this by changing your oil and looking for any signs of anti-freeze in the old oil. You caould also rent a compression tester from your parts storeand use this to test for proper compression in each cylinder. Accomplish this by taking out your spark plugs one at a time, screwing the tester into the hole, and turning the engine over to get a reading. If one cylinder reads substantially lower than the others, you have a bad head gasket or a cracked head. If you go this route, be sure to disconnect your coil or all of the plug wires to prevent the car from actually starting. If this is not the case, another possibility would be a leaking freeze plug. These are steel disc-like plugs placed in the head and block to prevent them from cracking in the event your coolant freezes in the car. Since they are made of steel and are usually fairly thin, they tend to corrode from the inside and rupture under pressure. Take a very close look around where the leak seems to be coming from, preferably with the car running and up to temperature so that the leaks will be easier to detect. You might want to pick up an inspection mirror from the parts store to faciliutate your hunt. These can be had for around $5 and are invaluable when trying to find leaks or lost parts. Hope you find what you are looking for and the problem is not too severe.
SOURCE: 1994 Lexus ES300 overheats after a few miles and
a cracked block or bad gasket can result in compression bleeding into your cooling jacket causing the symptom you describe. a good shop has a tester to determine if there is compression residue in your coolant. that would be a place to start.
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