Originally Posted by bindi
But wouldn't I notice it when I stop? I lift the bonnet - nothing that I can see.
'cept I did notice the SLIGHTEST leak near the convertor again, but nothing like what is going missing. I am paranoid though, if I fix it will I blow the head again???!!!
Coolant leaks can be frustrating.. and you won't necessarily see a leak when you stop and open the bonnet.
But don't get paranoid about fixing a leak.. Get paranoid if you dont (which is probably what you meant)
I pressure tested an EA a couple of weeks ago that was loosing coolant with no signs showing after being checked when driven and still hot.
The owner was worried about it being a head gasket.
A few minutes with a pressure tester on the system and a leak showed at the back of the water pump.
We changed the water pump and it's been ok since.
Some leaks can stop when the car stops, although a slight leak, as you mentioned at the converter, could be larger when the car is on the road.
Find a garage or radiator shop who can pressure test it while you wait and watch.
Watch under the car for anything tell-tale and trace it back to the source if it's a really tricky one.
Check inside in case it's a heater core.
Sometimes, with spark plugs out after half an hour can show if it's an internal leak into a combustion chamber, but it'll often show in the colour of the plugs as well.