1998deville Coolent Leak

When I Fill The Reservoir With Coolent It Leaks Out On The Driver Side. I Know The Water Pump Is On That Side ,but Would The Water Pump Leak With The Car Not Running?? ALSO CAN WATER GET INTO THE OIL FROM A BAD PUMP???

I'd look futher into where exactly the leak is. Usually the waterpump leaks on the Northstars start out very small. It could be a hose, or gasket for the thermostat housing.
And no, a bad waterpump won't cause water to get into the oil. Do you have that problem now? Is the oil milky, or does it look like oil should?

I'd look futher into where exactly the leak is. Usually the waterpump leaks on the Northstars start out very small. It could be a hose, or gasket for the thermostat housing.
And no, a bad waterpump won't cause water to get into the oil. Do you have that problem now? Is the oil milky, or does it look like oil should?

The oil is milky... ALSO WHITE SMOKE WAS COMMING FROM THE EXHAUST I PUT A SEALENT IN THE RESERVOIR AND THE SMOKE IS ALMOST GONE. I NEED TO KEEP A WATER HOSE IN THE RESERVOIR BECAUSE OF THE LEAK...
THANK YOU..

The oil is milky...

I would have a cylinder pressure test done to see if it is a headgasket failure, and which one it is.

Thank You

If Headgasket Is Blowen Will Water Leak When Engin Is Off And I Fill The Reservoir. The Water Leaks Out Near Water Pump.area..but I Can T See Exactly Were....

If Headgasket Is Blown Will Water Leak Out When I Fill The Reservoir With Engin Is Off.. The Water Leaks Out Around The Water Pump Area But I Can T See Exactly Were..

If Headgasket Is Blowen Will Water Leak When Engin Is Off And I Fill The Reservoir. The Water Leaks Out Near Water Pump.area..but I Can T See Exactly Were....

I doubt it would leak out of the engine if it was blown. That would be a real serious failure, and I don't think the engine would run very well.
It sounds like you have a bad waterpump, if you can't find any other source of the leak. They are easy to change, but you need a special wrench to change it out.

I doubt it would leak out of the engine if it was blown. That would be a real serious failure, and I don't think the engine would run very well.
It sounds like you have a bad waterpump, if you can't find any other source of the leak. They are easy to change, but you need a special wrench to change it out.

THANKS AGAIN, I LL TRY CHANGING THE WATERPUMP...

My Check Engine Lite Is Always On. I Had It Check And They Said It Was A Knock Sensor.where Is The Knock Sensor. Is It Ez To Change?? Here Are Active Codes,pc325,pc1602,ac1347,pc1571,pz2042.
Can Anyone Help????? THIS IS ON A 1996 DEVILLE...