Hot answers tagged

20

"Is it safe to continue driving with low coolant as long as I continue to watch the temperature gauge? " No, the temp sensor reads coolant temperature, if the coolant gets low enough to be below the temp sensor, now the sensor is reading metal temperature of the area it is screwed into (usually cylinder head), by the time it reads too hot on the gauge the ...


12

Number one answer is always Head Gasket. The reason is that there are oil and water passages in close proximity, being separated by a gasket (which might just be flimsy paper or rubber, but is often steel or copper) sandwiched between two pieces of metal with (usually) different thermal expansion rates. This means that any time your engine gets far enough ...


10

If you do not have any leaks, then your coolant is most likely getting burned and/or going into your oil. My guess is going to be a problem with your head gasket or some crack or warping in the head. I believe coolant in oil used to turn oil more brown and make it more foamy or milky. These days, the detergents and dispersants in modern oil can reduce ...


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 ...


8

Any car in good operating condition should be able to make the trip. My advice would be to: 1) Fix any known problems with the car. This includes making sure the spare tire is in good shape and fully inflated. 2) If your car consumes oil between changes, bring along a spare quart or two. A long road trip can cause an apparent increase in consumption as ...


8

First, you do need to find out where the coolant is going. There is UV dye that can help with this, and if your car is smoking, that could be a sign that the coolant is leaking into the engine rather than on the ground. For the main question, "Is it safe", as long as you keep an eye on the temperature and it's not getting too high, you should be OK in the ...


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 ...


7

If you can see and access the crack, a two-part epoxy or something like JB-Weld can be great for a temporary fix. This page shows the process on a metal radiator for a race car, but your fix would be similar. Clean the site of the repair, and rough up the surface with fine sand paper, especially if working on plastic. Mix the two-part epoxy and generously ...


7

I do not understand why the coolant system needs a bleed screw at all Because air pockets. Filling up coolant doesn't necessitate that the entire system will be filled with coolant. There are parts of your cooling system that will trap air when it is refilled. The bleed screw is a means to expel the trapped air from the system. I repeatedly fill ...


7

This particular bottle is knows as a degas bottle. The reason it has a strange shape is two fold. First, the bottle needs to fit somewhere and the shape helps that. Second and more important is that these degas bottles hold pressure. The shape reinforces the bottle so that it does not explode. In cooling systems with degas bottles the coolant does not ...


7

If your normal journeys get the car up to temperature and you have trusted it so far, then a long journey should make no difference, in fact cruising speeds should be easier on the car than constant stopping and starting. If you currently don't loose any fluids and there are are no strange noises, then I wouldn't worry. But if you really need confirmation, ...


6

Do not pour it down the drain, and do not pour it outside. Coolant is very sweet tasting to animals and they will "drink" it. It will affect both their kidneys and GI tract with potentially fatal consequences if not treated. Typical symptoms include vomiting, thirst, lack of appetite and unusual lethargy. If you pour it down the drain, it will pollute ...


6

Putty/epoxy works but here's a handy tip I picked up from my materials professor to ensure that the crack doesn't propagate: Drill small holes at the ends of the crack to arrest its growth before using metal putty/epoxy to seal the existing crack. My dad used to own a Maxima that developed a crack in the radiator's aluminum head. The mechanic he took ...


6

Simple And Technical Definition Of Coolant From a technician's standpoint "engine coolant" would be referring to the 50/50 mix of ethylene/polypropylene glycol and water. From an engineers standpoint engine coolant would TECHNICALLY be anything that assists the system in the cooling process. So, in this case you could refer to the fans, oil, and Anti-freeze ...


6

What is engine coolant? Engine coolant is a water and antifreeze solution. Because water has good properties as a coolant, antifreeze is used in internal combustion engines and other heat transfer applications, such as HVAC chillers and solar water heaters. The purpose of antifreeze is to prevent a rigid enclosure from bursting due to expansion when ...


6

I can see a few reasons to do this: The weather in some places will be so cold that even with the thermostat fully closed the cooling system isn't able to warm the engine up to operating temperatures. Inhibiting air flow through the radiator will reduce the amount of heat rejected to the surroundings, allowing the engine to get up to temperature. The cold ...


6

They may not have bled your cooling system properly As a possibility, if you had air trapped in your cooling system it would expand as the engine approached operating temperature. It would eventually, hopefully, make it's way into your radiator where the air would get released into the overflow tank by a valve that opens with higher pressures. As the ...


6

tl dr; Not directly, but yes. The purpose of a recovery or overflow tank is to allow for expansion of the coolant, then to recover it back into the radiator as things cool off. If the tank is not there (or it all leaks out), the radiator is pushing it out onto the ground without the ability to recover any of it. When things cool off, it sucks air back into ...


6

Its not good to run with low coolant, even worse to run with no coolant. Actually it can be quite disastrous (possibilities include blown head gaskets, seized pistons and a number of expensive repairs), but many times this is a result of a leaky radiator cap which is easy (and cheap) to replace. Someone already mentioned the dyes for detecting leaks, but ...


5

In answer to the question of how to test your coolant mix, you would use an antifreeze and coolant tester In answer to why, you would want to ensure that your coolant mixture is correct as this provides protection against icing in the winter, enhances the effectiveness of the system in the summer and provides some corrosion inhibitors to prevent your ...


5

There are only four places (in general) coolant can go missing: Out an external leak and onto the ground Out through the tail pipe getting burnt (turned into steam) because of an internal leak Into the oil through an internal leak A very small amount may evaporate from the system if it's not a closed system (ie: no overflow reservoir) ... this really isn't ...


5

If the thermostat is stuck open, you would get the symptoms you describe. A thermostat stuck closed will cause overheating.


5

The difference you observe is quite notable, so I wondered how reliable it is to just measure the density (which is what your hydrometer does). From the datasheet of your Ford antifreeze, the density is 1.10kg/l, while pure ethylen glycol has 1.10kg/l. Glysantin is another brand for antifreeze and states 1.122-1.125kg/l for its G48 (sorry, german) This ...


5

Here is a picture of your coolant recovery tank: If you look on the right side of it, you'll see the two lines there on the outside. Those are your min/max lines. Hopefully you can align this with what is in your vehicle to get a good understanding of where it should be.


5

You could have a head gasket leak into your cylinders If you do have that issue you would not see any coolant leaking from the motor. It would be going into your combustion chamber where the air and fuel are ignited thereby driving your piston down. You would troubleshoot this with a leakdown tester or a compression tester. Leakdown Tester Instructions ...


5

The first thing to check for when you have oil and coolant mixing is a blown head gasket. Check compression on all of your cylinders with a compression tester (you can borrow them from AutoZone or similar) and specifically look for one or two cylinders that have significantly lower compression than the others (in the range of 30+ psi difference). Another ...


5

Take it to a mechanic and have him/her do a bumper to bumper check. The mechanic will let you know if there is anything urgent. You can then choose to risk it or fix it. Good luck on your trip!


5

In addition to the others. Every time you stop to gas up or take a break, take a look around the car, check the fluids. Bring a decent set of tools in case something happens - sockets, breaker bar, screwdrivers, duct tape, zip ties, WD-40, flash light. Make sure your jack and spare are good and functioning.


5

If you can't see any obvious signs of leaks, or steam coming from anywhere if you run the engine, a likely cause is a cracked cylinder head gasket, which is letting the coolant into the cylinders and out of the tail pipe as steam. That could soon cause a lot more damage than the hassle carrying a water container in the car to top up the radiator. Personal ...


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 ...



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