hissing from the back of the engine with engine off headgasket???

[thrdtryGSX]

I am trying to get basetuned for my dsmlink. I warmed up the car took it for a drive and came back to get LTFT working and after I had made adjustments and turned off the engine to go inside I could hear a hissing sound. I popped the hood and pinpointed it to the backside under the intake. I put my hand under there (no a/c) and reached around to feel for air or water but I could not feel any obvious leakage. It kept hissing for 5 minutes or so then it stopped. I hope this is not a headgasket issue. I searched but the "hissing" sounds were for radiators and boost leaks. Please help. Thanks, DAN

 

[95TalonOwner]

It could be your intake gasket.

 

[spinz4]

Check the heater core lines for a coolant leak.

 

[92awddsm]

Check the brakebooster, hose, and the checkvalve inside the hose for leaks.

 

[92awddsm]

It could be your intake gasket.

The intake will not hold enough pressure or vacuum to leak for 5 minutes after the car is shut off. It actually goes to atmospheric pressure when the engine is turned off.

 

[thrdtryGSX]

I went for another drive came home and wiggled the booster lines it got louder so I went and picked up new hoses and clamps from napa. I hope that cures it. I didnt know the brake booster held pressure till now.