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Changed water hose on my car losing a little water cant find a leak when i open the water cap seems a lot of pressure wnen i open the cap even when its cold

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It sounds like you have a Head gasket leak or a cracked Head or Block. Check your Sparkplugs for color and fouling. It can be in the early stages of failure and the Sparkplugs are holding up; or the leak is putting Antifreeze into the oilpan. Check the Dipstick. Somehow engine compression is getting into the water passages. Check exhaust for sweet smell while running and excess vapor which is actually steam.

There are several ways to find this type of leak. A Radiator pressure tester will show a drop in pressure. This will verify the problem. You will be able to find an external leak with this test. If you use a Chemical Tracer, the Pressure tester will force the Tracer into the crack. The Tracer is more reliable than depending on Antifreeze color to find the leak and will show up in the oil.

By checking the Sparkplugs for telltale signs first, on the V engines you may only have to remove 1 cylinder head instead of 2. This will save you time and money. If you have no luck in identifying which side is bad, both will have to be checked by removal.

There are products which claim to seal these leaks. The Radiator pressure can range from 14 to 21 PSI. Without engine compression of 140 to 180 PSI the sealers sometimes work. But if engine compression is getting into the Radiator you will be blowing out antifreeze through the overflow pipes.

You did nothing wrong in changing the Radiator hose. You just repaired the weakess link. Now that the hose is stronger the leak moved somewhere else. Good luck on this repair. The Tracer chemicals are available at Autozone, Oreillys and several other places.

Posted on Aug 03, 2010

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1 Answer

I keep losing water from the radiator feeder bottle.i have to top it up even on short journeys. what may be causing this problem


Check dipstick for cream like sludge=water in oil. Check tailpipe for white smoke = water into combustion chamber. If yes to any, leaking head gasket or cracked head. You can also get a radiator test pump from most loan-a-tool programs at parts stores. Pump up pressure and try to find leak as pressure drops. Seeping hose or small waterpump leaks can be hard to notice if they only happen while driving. Even bad radiator cap can do this.

Jun 24, 2015 | Cars & Trucks

1 Answer

Overheating


Doesn't sound like it ran hot enough or long enough to crack or warp the head. If there is a crack, the engine will continue to overheat. If a warped head, car would probably run rough, the affected cylinders would likely have little or no compression, there would be a noticeable miss, and overheating would continue.
Why the low coolant? It's a sealed system, so should never have to add coolant, other than a small loss from evaporation in the overflow tank. Monitor the level closely for the next few days. Note the level in the overflow tank to see if it drops over time. Leaks can be external anywhere in the coolant system-engine, radiator, hoses, heater core- or internal in the engine-head gasket failures can cause coolant in the cylinders (white smoke out the exhaust), or coolant in the oil (oil will have a milky brown look to it), or oil in the coolant (will see traces of oil in the radiator).
A couple of tests may be called for. A pressure test of the coolant system will check if the system holds pressure as it should-about 15 psi. If pressure does not hold, there is a leak somewhere. Water pumps usually leak through the weep hole when they fail. A radiator leak would show up when pressure is applied. If pressure does hold, check if you have a good radiator cap-the cap is what seals the system so pressure will maintain. Coolant under pressure raises it's boiling point by about 10 degrees, so is critical to keep the system under pressure.
If you suspect further problems-losing coolant or continued overheating-then have the chemical test done to check for exhaust gasses in the coolant. Basically a check if the head gasket is good, a simple test done at the radiator cap opening with a special fluid that changes color if hydrocarbons are present in the cooling system.
Or you could have a compression test of the cylinders to check the internal mechanical condition-not only tells you if head gasket is good, also tells you a lot about engine condition-even,. balanced, good compression in all cylinders translates into good power output-rings are good, valves are sealing good, all systems go.
The cooling system: water pump, thermostat, radiator, hoses, heater core and hoses, radiator cap, overflow tank, and the cooling fans and associated wiring. Make sure everything is working right and you'll be good to go.

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1 Answer

Loseing water and alot of pressure in hose 1997dodge dakota v6


Have you checked the thermostat to see if it opens at 195 degrees ?
Is the radiator cap working correctly ?

Feb 06, 2013 | 1997 Dodge Dakota

1 Answer

Losing a lot of coolant. I don't see a leak. I started to drain the system and it smells burnt to s**t. What might my problem and possible solutions be?


see this causes and fix it. God bless you
Water pump -- A bad shaft seal will allow coolant to dribble out of the vent hole just under the water pump pulley shaft. If the water pump is a two-piece unit with a backing plate, the gasket between the housing and back cover may be leaking. The gasket or o-ring that seals the pump to the engine front cover on cover-mounted water pumps can also leak coolant. Look for stains, discoloration or liquid coolant on the outside of the water pump or engine.
Radiator -- Radiators can develop leaks around upper or loser hose connections as a result of vibration. The seams where the core is mated to the end tanks is another place where leaks frequently develop, especially on aluminum radiators with plastic end tanks. On copper/brass radiators, leaks typically occur where the cooling tubes in the core are connected or soldered to the core headers. The core itself is also vulnerable to stone damage. Internal corrosion caused by old coolant that has never been changed can also eat through the metal in the radiator, causing it to leak.
Most cooling systems today are designed to operate at 8 to 14 psi. If the radiator can't hold pressure, your engine will overheat and lose coolant.
Hoses -- Cracks, pinholes or splits in a radiator hose or heater hose will leak coolant. A hose leak will usually send a stream of hot coolant spraying out of the hose. A corroded hose connection or a loose or damaged hose clamp may also allow coolant to leak from the end of a hose. Sometimes the leak may only occur once the hose gets hot and the pinhole or crack opens up.

Sep 28, 2012 | Cars & Trucks

1 Answer

What do i do to find a coolant leak?


If you are losing coolant first get a pressure tester and find out if your your system is losing pressure, if so look at your water pump to make sure it not leaking. it has a weap hole on it, you might check your heater core to make sure it not leaking, it will some times make a smell in your car if it leaks.Next check all your hoses and radiator cap. I hope maybe i helped you a little

Feb 04, 2011 | 1999 Chevrolet Malibu

1 Answer

My 2000 hyundai tiburon keeps overheating. I've


With the motor cold, I would remove the drive belt and try to turn the water pump pulley by hand. It should move freely and only make a gurgling noise like water moving inside the motor but should not make any metal on metal noise if it's working properly. This is likely your cause. The water will only weap out of the pump when the shaft of the pump is turning thus the intermmittent leak when you park.

Also the radiator cap was probably removed to perform the leak check but you have to inspect the radiator cap itself. If the o-rings in the cap are worn you could lose pressure in the system and even though you might not see the liquid coming from the cap it could be shooting out through a rubber hose near the cap. If the water pump checks out I would try a new radiator cap.

Jul 25, 2010 | Hyundai Motor 2000 Tiburon

1 Answer

Check engine on, coolant overheating, i already change water pump, but water hose is with a lot of pressure, do you think can be air on water system?


All car cooling systems have at least 10lb pressure, check with your manufacturer on your car's radiator pressure cap or local parts supplier. If pressure is alot more then I would suspect a leaking head gasket.

Easiest test for the obvious leaking head gasket is when the engineis cold / remove the radiator cap and fill right to the top with water and crank / start engine. If you see a mini "guyser" of water come out then head (S) need to come off.

You haven't mentioned whether its actually losing . using water??

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1 Answer

Excessive coolant/water


The only way to find out if it has a leak is to have it pressure tested. This will determine if it is holding up the pressure. If it can't hold the pressure then it has a leak somewhere that is not easily seen. Logic tells you that if its loosing coolant then it has to go somewhere. Sometimes the leaks are coming from a worn out cap. When the pressure inside increase, the water comes out slowly enough for you not to notice anything. Also check the small hoses that go to the throttle body. and the heater hoses. If the car has a tendency to run a little hot, don't take that for granted, because that could be the reason why you are loosing coolant. The sooner you find out the problem the better, because you know this is just the first stage, and if left alone will get worse over time untill it becaomes a major problem. Glad you posted it.

Nov 11, 2009 | 2000 Chevrolet Blazer

1 Answer

Overheating Problem


There are a lot of places it could be leaking from,it could be a head gasget, freeze plug, intake gasget, ect. best thing to do is pressureise the cooling system and look for a leak, and watch the pressure guage on tester. Do you have the right radiator cap? or at least the right # cap. That is something thats over looked a lot, and they go bad too.

May 30, 2009 | 1988 Ford Thunderbird

1 Answer

89 gmc 5.7 cooling problems


Hi! Screw-1
Some times I even get a little confused when the temperature gage in the cabs are not as accurate as we would expect. If you leave the radiator cap loose and put a thermometer in the coolant, or better yet ask around and find a infrared thermometer (you can leave the cap on). Check this reading at both ends of the radiator. Even if the water is at 210 degrees F, at the inlet from the top hose, as long as the coolant is at a lower temperature at the opposite end, this should be fine. If the radiator cap is leaking you may want to make sure the cap is ok.

If the gaskets are old, the pressure change with the breather off may indicate the PCV valve is not working properly. I believe the crankcase breather is still in the air breather. The combination of problems as well as excessive blow by will also cause leaks.

InMrFixIt

Sep 04, 2008 | 1989 GMC K2500

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