sebring oil leak

[zeakieb1]

i replace head gasket on a 2.5 v6 engine is leaking oil from under the intake in the valley down the transmission i forgot to put a bolt in the exhaust manifold tube that goes to the intake which probably resulted in a vacuum leak and didn't tighten the other one my question is would that cause a serious oil leak[about a quart a day] or could the head be warped or cracked