pressireized air

[thebigbr]

hi, have a 1990 laraedo
recently i chaged the spark plugs and cables. after i did that i fired up her up, and now i get this pulsating sound comeing from the front passenger side of the engine. it sounds like bursts of pressurized air. kinda like the sound an air compressor makes when its filling up a tank. a buddy of mine said its probably coming from the A/C but i dont think so, it seeems like its more the front of the block. while i was changeing the plugs i did have to kinda push aside a couple Rad hoses to get to where the sound is comeing from. also, just before that i noticed some rad fluid comeing out of under my Resivoir, maybe they are related maybe not. im just wondering if anyone knows what it might be.
thanx again

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