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1

For cars of this vintage, there were two different coolant overflow designs in place. One design used a simple system, with an overflow bottle. There was a single hose that ran from the top of the radiator to a catch bottle. For this system the radiator cap has a fancy double seal system. One seal holds pressure to 13psi. Above that anything else goes ...


1

Perhaps there is some air in the system that is caused by a leak. Or something. I would take the radiator cap off, run at idle and watch the level there. Add coolant at the proper mix so that the top of the core is always covered. After a while the air should be removed. But if there is a leak, you must fix this. Watch for bubbles. When the bubbles ...


2

As a first step to helping you answer your question it will be helpful to familiarize yourself with the cooling system. I would recommend this video as a short introduction. https://www.youtube.com/watch?v=J48JLu_L5cY There are several components that may fail in the cooling system. Here is a list of places where leaks can typically occur. A cracked ...


3

You can't have a leak in your cooling system, period. You need to get the car back to the mechanic if you have a coolant leak (albeit a small one). Over time you'll continue to lose coolant when the system pressurises and this is unacceptable as the car won't be reliable. Eeventually the coolant will boil and the engine overheat when enough coolant has ...


1

I suspect that you've filled the system correctly but that the additional stress places on the seals which were perhaps old, perished and slightly seeping have now, with the added pressure, failed completely and that the cloud you saw was the gas escaping at speed.


8

The coolant capacity of the 2004 TOYOTA COROLLA 1.8L 4-cyl Engine Code [R] 1ZZ-FE is 6.9 quarts. To accurately ensure you have a 50/50 mix in your system after a flush (assuming you actually flush it until you have clear liquid draining out), is to add 1/2 of the coolant as straight coolant (not 50/50 mix), then fill the rest as distilled water. For ...


5

You can use a coolant mixture tester to test the coolant to water ratio. Any auto parts store should carry them.


9

Yes what you presume is correct. Depending on total volume of coolant (different for each vehicle) how much pure AF I put in, anywhere from 1/2 to 1 gallon, then top off with 50/50 mix. It is better to be over the 50% mix than under, you can go as high as 70%, so don't worry about putting a little too much pure AF after flushing the cooling system with ...


2

Either the starter is bad, or the engine overheated severely and has galded the pistons causing it to resist being turned by the starter. Try a new starter, if symptoms are the same, see how hard it is to turn the engine over using a breaker bar and socket, use the front crankshaft damper bolt to turn the engine clockwise, can you turn it fairly easily? If ...


2

I'm going to post this answer as preliminary and will update when more information is available. If there is water visibly leaking from an engine, there are a few major culprits: hose connections, the water pump, and freeze plugs. Since the water is coming from a "hole in the engine", I think we can cross off water hose connections. If the water is ...


5

There are three places I can think the water would be flowing out of from the back area of the engine. The engine in your Yukon should be the GenI Small Block Chevrolet (SBC) engine (I believe they started putting LSx motors in them in 1999). The SBC has water passages through the intake manifold at the front and back of the engine. If one of these passages ...


1

You need to get this car to a Mechanic ASAP. Even though you keep an eye on the gauge. By the time the gauge is in the danger zone the damage has already been done. Spent the bucks now to fix it and save a bundle on the chance that thing Blows a gasket..........



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