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Go to a different make of radiator friend. That companies radiators that all leak is not a reputable company. Even of it's an OEM radiator. Or take it to a radiator shop and have them test, repair and re-install it. THEN you KNOW it's not going to leak.
On this one, You will need to know where the water is leaking from and oil as well. Sounds like a hose or Tstat gasket. The oil leak cud be the gasket on the oil filter.
Well there are only 3 things that could have gone wrong.
1. Radiator Leak - this means the radiator has developed a hole with via corrosion of the metal parts of simply integrity failure of the plastic parts of the radiator.
2. Hose leak - this could be a hole in 1 of 2 hoses that connects the engine to the radiator. Or it can also be a leak where the hose connects to the radiator (clamp Failure).
3. Water Pump breakdown - this is where the gasket in the water pump has failed and is leaking out the water rather than pumping it.
All the problems above has different ways of diagnosing. but we can probably narrow it down.
1. if the leak is near the radiator then it could be a hose connection, hose breakage or Radiator hole.
2. if the leak is nearer the engine then check the other end of the hose and if its not there then it could only be the water pump is leaking. You can check this if there are water stains on the water pump. The water pump on a 1990 corolla is mechanical turned also by a fan belt. Look for a pulley that has a hose connected to the radiator and that would be the water pump.
Assuming the following; The head gaskets were replaced properly The Water Pump was replaced properly The Thermostat was replaced properly
There are only a few other things to check. 1) if you you remove one of the heater hoses from the engine bib during a cold filling from the radiator - it will release trapped air until you see the coolant coming out the motor side - this works great to ensure the air is out. Hook hose back up before running.(or you could leave the hose off for a second and start it to see if water gushes out - water pump check - kinda messy though)
Remember that heater water will circulate even with the thermostat is closed.
if that does not work, then you need to ensure the top hose going to the radiator warms up indicating the thermostat is opening and hot engine water is starting to dump into the radiator.
2) the radiator more than likely is clogged and needs cleaning by a radiator shop, or replacement if it is not one that can be cleaned.
Ask your son if he remembers looking into the water ports where he took off the old water pump, sometimes of the system is not flushed at proper intervals, it will sludge up the water jackets and keep water from circulating through the motor.
one last thing (gulp) That CO check is pretty accurate - and cheap. You might want to have it checked again - because the heads should have been inspected for cracks as well as pressure checked before putting them back on - especially since the motor overheated. That alone will crack the heads beyond repair - more so than not.
It Depends on which engine you have, this is how it goes for both. I use a little RTV with a new ring as well.
THERMOSTAT REPLACEMENT (4.2L ENGINE)
Removal Procedure 1. Remove the necessary coolant from the radiator. 2. Remove the generator. 3. Loosen the outlet hose clamp at the thermostat housing. Remove the outlet hose from the thermostat housing. 4. Remove the thermostat housing bolts. 5. Remove the thermostat housing from the engine block. 6. Clean all of the surfaces of the thermostat housing. 7. Clean the sealing surface of the engine block. Installation Procedure
1. Install the thermostat housing to the engine block. 2. Install the thermostat housing bolts. Tighten: Tighten the bolts to 10 N.m (89 lb in). 3. Lubricate the inner diameter of the radiator hose with engine coolant. 4. Install the outlet hose to the thermostat housing. Secure the hose with the clamp. 5. Install the generator. 6. Fill the cooling system with specified coolant and concentration. Follow the correct cooling systen bleed procedure for your engine. 7. Inspect all sealing surfaces for leaks after starting the engine.
THERMOSTAT REPLACEMENT (5.3L ENGINE)
1. Drain Radiator and remove the radiator outlet hose. 2. Remove the water pump inlet bolts. 3. Remove the water pump inlet and thermostat from the water pump.
Installation Procedure IMPORTANT: The thermostat is not serviceable separately. The water pump inlet and thermostat must be replaced as an assembly.
1. Install the thermostat and thermostat housing to the water pump. 2. Install the thermostat housing bolts.15 N.m 3. Install the radiator outlet hose. 4. Fill the cooling system with specified coolant and concentration. Follow the correct cooling systen bleed procedure for your engine. 5. Inspect all sealing surfaces for leaks after starting the engine.
is it actually on the engine? I ask because you say it is to the passenger side and just behind the engine, that makes me think it is a heater hose, the heater hoses go from the water pump to the heater core which is located on the passenger side, the difference between heater hoses and radiator hoses is the size and of course location, heater hoses are generally about 1/2 inch to 1 inch, with radiator hoses being between 1 3/4 and 3 inches
OK no big deal you are not the first and you wont be the last.
First thing have you run the engine since putting it in the radiator if not good...iF YES then it will take a little longer. but dont worrie
Take the bottom hose off the radiator and turn the heater to hot let out all the water and some oil will come out but not much as it will stick to the sides of the engine and radiator etc .
Refit bottom hose and tighten up the clamp then remove the thermostat and refit the top hose Now fill with water to 3 " from the top Now add 2 egg cups of washing up soap suds to radiator refit cap and start and run till the temp gauge gets to 1/4 up and then turn off and let it cool down for 1/2 hr and drain again ,and do the same 2 more times .
them on the 3rd drain it should be clean water and refit hose and check all clamps and wash thermostat and refit (the same way it came out)
refill with either coolant or Antifreeze and with heater still on hot start and run and all will be OK..
Let me know how you get on RON
are you sure you bleeded the air out correctly. These are a pain sometimes. Water pump blades are know to fall apart and this could also clog up the system almost anywhere
the upper rad hose goes from the rad to the thermostate housing. this hose is @2-21/2" the lower hose same size goes from lower rad to water pump. There is a 5/8 hose from water pump to thermostate housing called bypass hose. and you have two hoses from water pump and intake to the heater core. hope this helps if not let me know thanks
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