Antifreeze is dump'n

[MtnDewd]

My 99 hoe has about 95k on it and I only drive it a few times a week. Over the past month or so I noticed that if it sat for several days there would be a small pool of antifreeze under the back side of the motor. If i drove it more frequently there was no leak at all. Today my son drove it to school and it over heated and I thought it blew a hose. I filled the radiator and drove it home with out a problem but then noticed antifreeze coming down from the back side of the block.
Tonight just went out and filled the radiator again with water try and locate the leak, but without even starting it up there is water coming down again form the back of the block.
Any thoughts on what the problem might be?
Thanks...

 

[clean454]

do u have a pressure tester? or know someone that has one u can use?

 

[tahoe 5.7 ss]

sounds like your intake -manifold gasket ,,try to reach towards the back off your intake manifold feel if its wet ,,

 

[JKmotorsports]

^^^ I'd have to agree and say intake manifold gasket.

 

[01yukonslt]

id agree with both of them above me especially since it ran out of there even without the engine running

 

[MtnDewd]

it doesnt look or feel wet on th back of the manifold and there is no sign that antifreeze was spraying on the firewall. It's just strange that I add water and it runs down the back of the block. Is there a freeze plug on the upper part of the block?

 

[MtnDewd]

yep...it's the manifold gasket. I guess I will be busy this weekend.
Thanks for the input gents...
Cheers!