Question about 1999 Chevrolet Corvette

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I have a coolant leak, but the hoses and frost plug are dry. could it be the water pump, where I see dripping from the bottom of the pump?

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Pressure test the system and see where its leaking from. To verify a water pump remove the belt and with one hand see if pulley is loose.
With regards to the leak you saw if its more than a drip comming from the weep hole of the pump when pressure tested than its the pump.

Posted on Jul 19, 2010

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My car is leaking coolant into spots what do you think it could be


water pumps start to leak when they are failing. Look for coolant leaking from a small home on bottom of pump. Could also be bad rad hoses, bad heater hoses, leaks around hoses and rad or hose and thermostat housing. And in the brutally cold weather worse case scenario could be corroded or blown frost plugs. Regardless, get it checked out and fixed, don't just drive it and hope it stops, it won't.

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My coolant level is dropping about two cup fulls every couple of months,there is no coolant on ground just a small water drip on garage floor after about middleways underneath engine after driving it.


There are only a few ways coolant can get out of the cooling system.
First check where the hoses connect to the radiator to make sure they are completely dry. Then check directly under radiator to make sure it isn't damp. Sometimes the radiator cap will go bad and allow some coolant to leave. You can replace the radiator cap relatively cheap. The very worst way you can be loosing coolant is thru a blown head gasket. The coolant slowly leaks into the cylinder and is burned. You would have to go to a mechanic to have this verified.

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Is what the liquid plain water or coolant (water mixed with antifreeze). touch and smell the liquid, no smell = water, antifreeze smell and oily feel = coolant.
If plain water, could be Air Condition condensation dripping from condensation drain which is normal. (this drain is usually located near the center of the vehicle).
If coolant, could be leak(s) from: radiator, radiator hose, heater hose, water pump, engine freeze plug. A coolant system pressure test should show what is leaking.

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from what you describe I am sure it is the water pump that is leaking, check the pump bearing for play to confirm

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A lot of suburus have a horizontal engine configuration. This leak could be from a number of places. I would dry all the coolant off that you can see, then let it sit for a while and try to trace it back to it's origin. Driving it will blow the coolant all over, so ideally letting it run for a while in the driveway, or garage after cleaning it will be better than driving it around town. Once you have an origin, such as a hose, a frost plug, from between the head and the block, etc. Then we can help you get if narrowed down further.

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Your problem is something like either a hose clip loose /biting into a hose and split it/a metal hose rusted and has a pin hole or a welsh plug (core plug) leaking. or a water plate gasket IE W/Pump/Manifold etc
Because it drips of the centre of engine dosenot mean it coming from the bottom of engine...

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Engine is pouring antifreeze all over the ground and over heats?


Start the vehicle. Check the radiator, hoses, and water pump for leaks. Look at the location of the leak. Is it under the radiator or further back under the water pump? If coolant is leaking from vent or "weep" hole on the water pump, then the pump is defective. If you can find no leaks, then it is most likely a faulty thermostat. Hope this helped and best wishes.

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My daughter's 1997 Saturn is leaking coolant and overheating..


Coolant leaks can occur anywhere in the cooling system. Nine out of ten times, coolant leaks are easy to find because the coolant can be seen dripping, spraying, seeping or bubbling from the leaky component. So open the hood and visually inspect the engine and cooling system for any sign of liquid leaking from the engine, radiator or hoses. The color of the coolant may be green, orange or yellow depending on the type of antifreeze in the system. The most common places where coolant may be leaking are:Water pump. A bead 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, as is the area where the cooling tubes in the core are connected or soldered to the core headers. The core itself is also vulnerable to stone damage. But a major factor in many radiator leaks is internal corrosion that eats away from the inside out. That's why regular coolant flushes and replacing the antifreeze is so important.
oses. 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. Freeze plugs (casting plugs or expansion plugs in the sides of the engine block and/or cylinder head). The flat steel plugs corroded from the inside out, and eventually eat through allowing coolant to leak from the engine. The plugs may be hard to see because they are behind the exhaust manifold, engine mount or other engine accessories. On V6 and V8 blocks, the plugs are most easily inspected from underneath the vehicle.
Heater Core. The heater core is located inside the heating ventilation and air conditioning (HVAC) unit under the dash. It is out of sight so you can�t see a leak directly. But if the heater core is leaking (or a hose connection to the heater core is leaking), coolant will be seeping out of the bottom of the HVAC unit and dripping on the carpet. Look for stains or wet spots on the bottom of the plastic HVAC case, or on the passenger side floor.
Intake Manifold gasket. The gasket that seals the intake manifold to the cylinder heads may leak and allow coolant to enter the intake port, crankcase or dribble down the outside of the engine. Some engines such as General Motors 3.1L and 3.4L V6 engines as well as 4.3L, 5.0L and 5.7L V8s are notorious for leaky intake manifold gaskets. The intake manifold gaskets on these engines are plastic and often fail at 30,000 to 80,000 miles. Other troublesome applications include the intake manifold gaskets on Buick 3800 V6 and Ford 4.0L V6 engines.
INTERNAL COOLANT LEAKS
There are the worst kind of coolant leaks for two reasons. One is that they are impossible to see because they are hidden inside the engine. The other is that internal coolant leaks can be very expensive to repair.


visit for more info:

http://www.aa1car.com/library/coolant_leaks.htm

Nov 24, 2008 | 1996 Saturn SL

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