unknown coolant leak

[98NVS]

I don't know what the hell is going on but when I drive my car for approx 20minutes then stop my car leaks coolant. its not coming anywhere from the radiator or hoses its leaking down from the oil sump. which means its leaking from up top somewhere. I can't find where the leaks coming from. is there any common problems on where coolant leaks from

 

[vx_commodore]

Not the heater line's?

Or the bottom of the water pump?

 

[TI3VOM]

I was going to say water pump as well.

 

[GTP 85]

More than likely the water pump is dying. There is a hole for the pump bearing that leaks coolant when its rooted. Some pumps become noisey and flog out the bearing, others die a quiet death and simply spit coolant out.

My 5L's water pump is currently dying a slow death. and its leaking just as you describe. I even went in there and tightened all hose clamps and inspected the witness marks of the coolant. Its fine to drive, i just keep topping the coolant up lol. Got a new pump but cbf putting it in atm

 

[PanthaVS]

Grab your heater tap (Above the drivers side chassis rail) and give it a firm wiggle on all the hoses going to it (4 of them) .. its plastic and perishes after time... chances are, it's cracked and when you wiggle it, it will snap/disintegrate in your hand... (Better it happen in your hand, and not whilst driving)

Cheap to replace... bursons, autobahn, repco, supercheap....

That is... if its that..

Otherwise, have you checked your rear main housing?

 

[TI3VOM]

GTP 85 has hit the nail on the head, my water pump did exactly the same thing, started leaving pools of coolant under the car whenever I stopped anywhere. I could see it was leaking off of the sump but could not figure out where it was coming from.
Run your finger around the bottom of the water pump and look for coolant.

 

[ben315vz]

Could be water pump, or it could even be the valley cover gasket.

 

[Hangman]

Welsh plug?

Just another possibility.