Can't see a head gasket failure causing a visible water leak out of the engine. First thing is stop putting radweld in. It will bung up your system and increase the chance of internal blockages and extra damage internally.

Secondly if you're driving round knowing your head gasket is gone and low on water………. stop! You're going to warp the head, you may even have done so already!

I feel your pain at having to use the car but there are no short cuts here to fixing it, you'll just knacker your car to the point it becomes undriveable, and uneconomic to fix. You may already be there. Be realistic, you need to stop driving it?

Fill it with water from cold, hunt round the engine bay to see where it's coming out from, and check back here for more advice. If it's really pouring out, it's likely it could be something as simple as a clip undone, and it should be easily seen. However it's also possible you've done further damage to it, by continuing to drive it………………….

 

If it's running down the pulley/cambelt end of the block without any other evidence it is likely to be the pump. Ended up dripping off the offside end on the sump with mine.

The seal isn't always seated correctly when it's fitted. I fitted my water pump 3 years ago and used "rotation" to ensure the seal was OK. It was seated perfectly but still developed a full on leak.

I replaced the cambelt and pump again in January. Check everything else first though before jumping in...

 

I did stop driving it right away, forgot to mention that sorry, but i put radweld in it to see if it would stop, i needed it for the weekend just gone, but since the leak didn't stop i didn't drive it. I have a garage at the top of the road and didn't even drive it there, i pushed it, then pushed it back down again, then towed it to a friends house. Had a good long look around the engine bay when cold, with water in, and i cant see where exactly its coming from, i have checked all hoses and clips though, as that's what i was hoping it would be, tried looking from both underneath and on top, seems to be the very bottom pulley, as none of the engine seems wet apart from the very bottom near the sump. When i put radweld in though, i had to start the car, but kept the expansion tank full and kept a close eye on temperature, and noticed that water was flinging off the cam belt.

In terms of it being the pump, would that just go like it has, as in just not leaking, then an almighty leak?

Thanks

 

There's a pipe on my bora that went from the side of the thermostat around the block to near the turbo.... It's a metal pipe and mine had a pinhole leak... Check yours.. I'll post a pic of the pipe in a min

 

This is the pipe that I had to replace.. Not an easy job but it fixed the leak