I have a 1992 Mazda 626 4-door sedan automatic, I think it's a 2.0 liter. Anyway, my coolant (in the resivoire) will empty itself... I don't know where its going...I noticed this problem when I started my car one day to let it warm up. I stepped out of my car (while it was running in park) and I noticed that my rpms were going up and down rapidly. I then looked under the hood and noticed my coolant resivoire was empty... I checked for leaks....saw none, so I filled it back up, and was good for about a week.... then the rpms started acting up again, and what do you know, my coolant is EMPTY AGAIN!! What could be going on? Please help, I already replaced my thermostat!!
2007-02-27 09:31:35 · 12 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
You have a leak in either your head gasket or your intake manifold (some Mazdas have the coolant run through the manifold as well as the block and head.) The engine is sucking the coolant out into the cylinder and getting rid of it through the exhaust pipe as steam - if it isn't a real bad leak, the steam won't be enough to be visible. Once the coolant is gone, the leak becomes a vacuum leak, causing the engine to have trouble keeping a steady idle speed. I suspect that it's the manifold - a friend once had a late 80s Mazda 626 with the same problem, and it turned out to be the manifold on his car. Manifolds aren't real expensive, and not a real hard job to replace.
2007-02-27 09:56:51 · answer #1 · answered by Me 6 · 0⤊ 0⤋
The fluid is obviously going somewhere! Don't just fill the reservoir; ensure the radiatopr is also full. Then, check for leaks by parking the car, after it has been driven and is at operating temperature, on a piece of cardboard and check for drips or leaks. If there are any leaks, they will probably be at the hose, connections, radiator or water pump. The first two are easily repaired, the radiator and water pump will be much more expensive repairs.
If there are no evident external leaks and the coolant is still disappearing, it is indicative of a major engine problem. Either a cracked cylinder head or a cracked block are the most obvious places where coolant is being used. You don't mention if there are any other signs apparent. Is the exhaust smokier than normal (white smoke is coolant that's being burned in the engine, indicating a cracked head or blown head gasket)? Does the car overheat (which may mean that the water pump is going south)?
2007-02-27 09:42:30 · answer #2 · answered by Kiffin # 1 6 · 0⤊ 0⤋
this could be anything the rpms are reving to help run the cooling fans are the fans coming on as it goes down maybe its the cap on the radiator sometimes they go bad replace that to the proper PSI for your car and try this hillbilly cure add about two tablespoons of black pepper to the radiator when cold then replace the cap now the black pepper will go to any small hose or radiator leaks and swell and plug them this doesnt affect the car just acts as a bandadge for small leaks ,, does the engine smell like antifreeze or steam when hot or oil burning check the oil dip stick wipe it after looking at it for water droplets if the heads are cracked by you running the engine out of fluids like oil and water then the water in the cooling jacket enters the engine this is a complete rebuild try this go to autozone and ask them about this
2007-02-27 09:42:44 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Must be a slow leak somewhere,. If the car has been running hot, it might be the head gasket. Or if you get an odor similar to maple syrup in the cabin, it could be the heater core. Have a mechanic check it out before it causes some major damage.
2007-02-27 09:41:22 · answer #4 · answered by crazydave 7 · 0⤊ 0⤋
if you're sure its not leaking, the only other way its getting out is through a blown head gasket. my guess is its coming out a small hole in the side of the radiator and once the engine warms up and water starts flowing, it sprays out of the radiator and evaporates. thats why you cant find a leak.
thats my guess anyway.
good luck!
2007-02-27 09:39:52 · answer #5 · answered by monotonous_life7 3 · 0⤊ 0⤋
You won't like this...if there is never anything on the ground, then it is probably a leaking head gasket...have your cooling system pressure tested at a shop, it will show if pressure is leaking out, and where, if it isn't a head gasket...
Good luck, I got my fingers crossed for ya!
2007-02-27 09:42:57 · answer #6 · answered by Michael B 6 · 0⤊ 0⤋
If your not seeing any visible leaks in your hoses are around the radiator, youmay have a blown head gasket. Has it overheated lately? If so, the block could have been cracked.
2007-02-27 09:40:58 · answer #7 · answered by KATHY A 2 · 0⤊ 0⤋
Check ur intake manifold. This happen to me last month. See if ur coolant is mixing with oil. Under the oil cap it would be a milky light brown color.
2007-02-27 09:41:13 · answer #8 · answered by jayfrezzy 2 · 0⤊ 0⤋
here a trick you can do to find the leak,, take some food color add it to the water in the rad,, pick a color you can see good, thenin a few day look to see where the color is come from
2007-02-27 09:44:42 · answer #9 · answered by ghostwalker077 6 · 0⤊ 0⤋
you could have a leak in your water pump. but you have to have a leak some where.
2007-02-27 09:39:09 · answer #10 · answered by Guido 2 · 0⤊ 0⤋