water leak on ABF from rear of Engine!!

[Diluxe]

just started my mk2 ABF after 7-8 months, the harsh winter and now hot days have perished something, I seem to have a wate leak somwhere round the rear of the engine.

Its not coming from the flanges on the side, if i look from the top , i can see it gushing out from the rear but cant get a good enough view to see exactly from where.

any ideas?

[Adam]

Heater pipes runing to the heater matrix?

[danny_p]

core plug

[Diluxe]

defo not the matrix pipes, where is the Core situated?

[VW BUSH]

Is the throttle body cooled?

[danny_p]

core plugs theres 3 of them allong the back of the block

[Mikester]

Is the throttle body cooled?

I think so.