Vy commodore

[Trevor loves holden.]

When you say past the sump doesn't say where, side front back? Usually when replacing radiator its a good time to replace your heater tap if it hasn't been done for some time, What about the bleed screw on top of the thermostat housing not leaking there.

 

[Aidan2611]

Yeah radiator has been replaced aswell as heater tap,
Themostat housing is looking fine.
Its dripping past the front of the sump when it leaks again ill send a picture through as its got me stumped haha

 

[krusing]

As a guesstimate, sounds like the O-rings at the front of the heater pipe extensions.
I did mine on my Super6 when I di the LIM Gaskets, as the rubber seals [O-rings] were perished,
I was surprised hadn't leaked earlier.

As mentioned , if you can, put some coolant in it temporarily, [preferably Red] so you can see the water leak trail,
Green is to hard to see,
Or
Put some food dye in the water if you don't have coolant.
Either way, you going have to flush it out anyway when you find the faulty and repair it.