It's obvious you have a beer-chugging owl in your engine bay.
marc780 said:Not enough info but i'll hazard a guess or two. If the chugging noise sounds like liquid, maybe there's air in your cooling system, leave the heater on all the time if you can and see if the noise changes. You can burp it by running it for 20 minutes with the radiator cap off.
Does the hoot noise happen all the time (in which case its gotta be in the engine or less likely, the transmission) or just when moving?. Does it vary with engine speed? The hoot noise sounds like it could be engine belts, clutch related (do you have a clutch), or maybe even a loose flywheel. Not enough info ------