Bad sound from the engine when it's cold, but what?, 3S-GE Options

[Iceman22]

Hello.
My 3s-ge engine makes a bad sound while it's cold, probably from the head (?). This only occur when it has not been in use for a day or more.
I'm not quite sure, but it looks like the sound is more noisy when rain enter the engine through the vents on the hood.
After 5min driving the sound disappears totally. The engine does NOT use any big amounts of oil, and I don't have any other problems with it, so I don't think it should be serious.

Anyway, here is a short video of the problem, hope someone know what the issue can be and help me (and maybe others)

http://www.youtube.com/watch?v=2N-8M2LIsfQ

[Rusty]

squeaky belt, most likely due to rain/water entering from your hood vents

[cax_11]

Hello.
My 3s-ge engine makes a bad sound while it's cold, probably from the head (?). This only occur when it has not been in use for a day or more.
I'm not quite sure, but it looks like the sound is more noisy when rain enter the engine through the vents on the hood.
After 5min driving the sound disappears totally. The engine does NOT use any big amounts of oil, and I don't have any other problems with it, so I don't think it should be serious.

Anyway, here is a short video of the problem, hope someone know what the issue can be and help me (and maybe others)

http://www.youtube.com/watch?v=2N-8M2LIsfQ

Squeaky belt, try testing the tightness by trying to rotate the belt with the fingers it should turn no more than 90degrees, if more, then adjust until it does. and when rain get on the belt it'll slip, thus squeaking. Your all good