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Re: water pump seal leaking - engine temp normal
HI. you will need to replace the water pump asap. once the seal is breached its a done deal. Its only a matter of time when the seal completely fails, causing a very serious over heating situation that will damage this fragile engine.
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If your water pump is leaking from the water pump for sure that is causing your over heating problem. I am sure that most likely the seal is gone. There is a main seal in the pump, and those are normally the first to go, and you are better off replacing the whole pump, that trying to fix it. Once your water pump is replaced , the over heating problem should be fixed. If pump is leaking it does not have the pressure provided to have the antifreeze and water to flow correctly through engine block and radiator.
SMOKE UNDER HOOD COULD BE COOLANT LEAK FROM RADIATOR ITSELF OR CHECK FOR LEAKING TOP RADIATOR HOSE AND CHECK FOR LEAKING BOTTOM RADIATOR HOSE.LOOK UNDER THE HOOD IF COOLANT BOILING OUT COOLANT OVERFLOW JUG ENGINE OVERHEATING FROM BAD THERMOSTAT OR BAD WATER PUMP.CHECK FOR COOLANT LEAK AT WATER PUMP WEEP HOLE.IF SO WATER PUMP NEED REPLACING.ADD MORE COOLANT UNTIL LEVEL CORRECT.TRY LOCATE LEAK. IF CAR OVERHEATED AND BOILED IT OUT. SMOKE UNDER THE HOOD CAN ALSO BE CAUSED BY LEAKING VALVE COVERS WHICH CAN BE FIRE HAZARD IF OIL LEAKS ON HOT EXHAUST MANIFOLD.
It could be the water pump , or something else , like a faulty thermostat. Where is the coolant leaking from ? If it is leaking from the water pump , then yes , your pump might be toast.
If the thermostat is no good , the engine will warm up to normal temp , and then overheat quite quickly. As it overheats and the coolant expands and boils , it could back up into the overflow reservoir and leak out onto the ground. You need to get someone to diagnose the problem ASAP , running your engine in an overheat condition could very quickly blow your head gasket and/or warp a cylinder head. If you can , please post a bit more info. Does it run but at a higher than normal temp. Does it only overheat when stopped in traffic etc.
Could be water pump , or thermostat , or plugged up radiator , or nonfunctioning cooling fans.
There are products out there like stop leak that MIGHT stop the radiator leak. However... the only real repair is either to have it soldered (if the end caps are not plastic) or replace the radiator all together.
Adding a product like "Stop Leak" most often starts to introduce other problems to your vehicle like a future water pump seal failure or clogs in the smaller water passages in the engine block, heads and manifolds and the thermostat heater bypass hole. Anyone that has ever done any major engine repairs will know immediately if stop leak was used in a cooling system.
The best fix is to replace the radiator.
Many radiators today can not be repaired
Stop leak is in most any auto parts store. Just be advised of what you can expect down the road.
1. warmer than usual engine operating temps
2. water pump seal failure
3. heatrer core clog (no heat)
4. passenger heat control temp valve clog (no heat)
The choice is yours. Personally I would not do the "Stop Leak" treatment attempt. Sometimes it works other times it does not.
it's sounds like the water pump it only leaks when it's cold because when the engine is hot the seal in the water pump swells up to seal the leak then as the temperature cools off the seal goes back to normal and allows coolant to go by
If the water tends to keep going down then there has to be a leak somewhere. Try also looking at the hose coming from the overflow tank and see if the hose might be kinked. You might also be blowing antifreeze out the tailpipe. Take a look and if there is bluish white smoke then you have confirmed that theory,