LS1 coolant leak back of engine??

[samlicastro94]

Okay so I have an LS1 clubsport and had just finished changing the oil, taken it for a drive around the block park up and smell coolant so I popped the bonnet could hear a hissing coming from the back of the engine, not the heater pipes or heater tap and when looking underneath quite a large amount of coolant was coming out drivers side from the rear of the engine I am absolutely stumped as to what it could be?? Intake manifold gasket?? Surely not.
EDIT: Had depressurised the cooling system left it for 15 minutes and started it up again and nothing??

 

[rambunctious]

Any welsh plugs in that area ?

 

[Tonner Matt]

I'd be looking at the coolant crossover between the heads (if it has 1 fitted) or the coolant crossover block offs on the head
These are sealed by a small metal gasket with an integrated O'ring/seal that may be leaking whilst under pressure

 

[accentstencil]

There is a welch plug at the back of the heads.

 

[samlicastro94]

SOLVED GUYS: forgot to post that it was resolved however I ended up jacking up the car and it was in fact the heater hoses it had a pinhole leak which was caused by the corner of the cylinder head there was no way to tell from up above.

 

[accentstencil]

Glad you found the problem. Thanks for reporting back.