I realized this weird noise the other day
When I do a cold start, I can clearly hear a water flowing sound. It does it immediately after the start for a couple of seconds then stops. After I try to move the car, it does it again for a another 3 4 seconds then you can't hear anything

btw, no it is not the washer fluid, it comes from the engine side of the car

sound is almost like this, only a faster and only for a couple of seconds. What might the problem be?
http://www.youtube.com/watch?v=rTN8frhWOlA

 

I have noticed my DD (Geo Prizm) does the same thing. I have only noticed it though when i turn the heater on after starting it - not sure of the cause though.

 

i'll be keeping an eye on this cause my car is doing the same thing, especially when its cold out.

 

It is just water flowing around in the heater core. when the car cools the coolant contracts and will make that noise. Since the water in the block and heater core circulates quickly and warms up fast it goes away rather quickly as well. I have the same noises when first starting the car. Some cars use a motor to open and close a valve to the heater core to keep water from circulating while it isnt on the heat setting but the evo does not.

 

from what you are saying, it sounds like it is a normal thing. but then every evo would be doing it. none of my friend's cars do that??

 

My car also does this. I always wondered what it was but I figured it wasn't anything too harmful so I never cared enough to look into it. Batty200's response makes a lot of sense though. Thank you!

 

+1 for Heater core