1994 Toyota Camry overheating

Tiny
PAULMOATS46
  • MEMBER
  • 1994 TOYOTA CAMRY
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 24,600 MILES
New water pump, new radiator, new temp. Sensor. I put the thermostat in water, heated it up several times. Seems to be opening ok but still runs hot. Sitting still it will heat up nomally, both fans will come on. After cycling on and off a few times. It starts spitting hot water out the over flow resevoir.I`ve unpluged the sensor in the bottom of the radiator so the fans run all the time but it still over heats. I took the top radiator hose off to check circulation, it doesn`t seem to be circulating. Do you gentlemen know what could be wrong? Any ideas, any advice
Tuesday, May 4th, 2010 AT 3:02 PM

42 Replies

Tiny
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Hi paulmoats46, Welcome to 2carpros and TY for the donation.

Brand new water pump, radiator and thermostat working okay-try bleeding the cooling system don't work get it block and pressure tested to rule out a blown headgasket, cracked head or block and intake manifold leak
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Tuesday, May 4th, 2010 AT 4:42 PM
Tiny
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That answer doesn`t help me.I checked compression, 155 on 3 cylinders.170 on 1
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Tuesday, May 4th, 2010 AT 8:25 PM
Tiny
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Your engine compression is good. Block testing is a liquid type tester that changes color if there's combustion gases in the cooling system. Pressure test is applying air pressure in the cooling system

Do this open up the radiator cap and start engine up if coolant spewing out -could mean your headgasket is blown-to verify again use a block tester.

Double check the water pump though its new and also the thermostat
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Wednesday, May 5th, 2010 AT 7:43 AM
Tiny
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Ok thanks, that answer helped a little. How do you check a water pump?I took the thermostat out, ran water throught it both ways, made sure it was full, started it up. No water came out top hose.
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Wednesday, May 5th, 2010 AT 1:39 PM
Tiny
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Water pump checking-remove rad cap, start the car up let it run for a few mins, coolant should be swirling around now pinch off the top hose for a few secs then let go the coolant flow should increase if the water pump is working
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Wednesday, May 5th, 2010 AT 4:29 PM
Tiny
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I did it like that both ways, with thermostat in. With thermostat out no flow either way
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Wednesday, May 5th, 2010 AT 6:10 PM
Tiny
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You need to open it back up and investigate the water pump
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Wednesday, May 5th, 2010 AT 11:08 PM
Tiny
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I looked real close at the impeller, housing, water inlet thermostat, hole going into head. There`s nothing visably wrong that I can tell
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Thursday, May 6th, 2010 AT 12:09 AM
Tiny
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Try putting the old water pump back on and see if it pushes coolant towards the radiator-
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Thursday, May 6th, 2010 AT 2:57 AM
Tiny
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Put the old water pump back on and see what happens
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Thursday, May 6th, 2010 AT 3:14 AM
Tiny
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I had to turn old water pump in I did all these checks before I changed the pump. Just supposing the water was going toward the raidator what would that tell you
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Thursday, May 6th, 2010 AT 12:20 PM
Tiny
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Its doing its job, you should see the coolant moving thru inside if its good if not could be a blockage in the head or block
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Thursday, May 6th, 2010 AT 4:00 PM
Tiny
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You need to go back and read my first post, i`ve told you I ran water through the head and water pump both ways, so there`s no blockage. I just drove the car about 5 miles and it over heated, when it spits out about a quart of water. The temp. Sensor won`t tell the fans to come on. But when you fill it back up with water it works fine until it over heats and the water gets low. What do you think about the possibility of a small crack in the head some where. Thank you for your help.
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Thursday, May 6th, 2010 AT 5:28 PM
Tiny
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1st respond:

try bleeding the cooling system don't work get it block and pressure tested to rule out a blown headgasket, cracked head or block and intake manifold leak.

Could be a leak thru the headgasket, cracked head or block or an intake leak-get it block and pressure tested to find out more
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Friday, May 7th, 2010 AT 3:26 PM
Tiny
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Ok thank you for the information, i`am trying to find a tester with a small radiator cap to pressure test it. Theres no bleeder fitting in the system.I just don`t understand why the water pump won`t move any water. Can you tell me why?
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Friday, May 7th, 2010 AT 11:23 PM
Tiny
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I put 18 pounds of pressure in the cooling system and it held it over night does that tell you anything?
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Monday, May 10th, 2010 AT 4:29 PM
Tiny
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No pressure loss- use a block tester, this is a kit that performs a chemical test on the vapors in the radiator. Blue tester fluid is added to the plastic container on the tester. If the fluid turns yellow during the test, then exhaust gasses are present in the radiator.

The most common causes for exhaust gasses to be present in the radiator is a blown head gasket. Replacing a bad head gasket requires a major disassembly of the engine and can be quite expensive. Other causes include a cracked head or a cracked block, both are even more undesirable than having to replace a head gasket.
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Monday, May 10th, 2010 AT 6:25 PM
Tiny
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That block tester cost 70 dollars and I don`t think it will pinpoint cracked head, cracked block or blown head gasket so I would have to pull the head, have it checked, repaired or replace it, buy gaskets for 120 dollars put it back togather and see if the water pump will move any water. Or if theres nothing wrong with the head and I can`t see anything visably wrong with the block, do I assume it was a headgasket and put it back togather?And hope for the best.I thank you for your help, I would still like to have your theory on why the water pump won`t pump any water
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Tuesday, May 11th, 2010 AT 1:02 AM
Tiny
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The idea of the block tester is find out if exhaust gases is making it into the cooling system thru a blown headgasket, cracked or block. It will change in color if there's a leakage.

To answer your Q on the water pump. If the thermostat is opening, and the radiator is not clogged-up and the water pump is not pumping coolant through out the engine. Did you position the jiggle valve correctly on the thermostat. And also the gaskets and oil rings are all in place and the water bypass pipe no clogged-Best check again the water pump in and out I know what you're going thru I've been there before with the oil pump and the water pump and I don't like it. Good Luck
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Tuesday, May 11th, 2010 AT 1:27 AM
Tiny
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That test is still not going to pin point the problem I would still have to do what I said. This thermostat doesn`t have a giggle pin and besides that, I took the thermostat out, it does the same either way, the water pump will not pump
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Tuesday, May 11th, 2010 AT 3:44 AM

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