ou sig

As the title states...I have been hearing this noise for a few months now. It sounds like a ping pong ball is in a plastic cup and bouncing around (sorry best I could do). or some sort of pressure release valve is engaging.

I have pinpointed the sound to the glovebox area and I now Know it only happens when the engine coolent is circulating - so when the engine is warming up and anytime after when the fan turns on and the coolent flows.

any idea what it could be? I can only figure there is something in the heater core that must be making this noise, because that is the only thing that I know of down there that has coolent in it.

SatinSilverTypS

iTrader: (1)

i wonder if it could be the blend door flapping shut on it's own. i'm looking at the diagram online and i don't see too much it could be. maybe the blend door motor is releasing intermittently and causing the door to flop shut. or maybe you have something caught in the blower motor. if it happens as soon as you turn the car on i would think to rule out coolant-related pipes because there isn't enough water pressure at startup to get adequate flow in the heater core. i think it's more a mechanical thing.

does it happen with the climate control off? (probably a dumb question)

anyone else have an idea?

SSTS

ou sig

ya it happens with the fan off also - that is what made me think it was something to do with the coolent. It doesnt do it right when I turn the car on, only after a minute or so when the coolent starts to circulate.

Ive heard the noise with and without the AC on, with or without the fan or heater on also...

fsttyms1

ive been having a intermittent problem like this also. i notice mine when the car is up to normal operating temp while driving. It comes and goes and is hard to pinpoint.

ou sig

ya thats how mine was for a while, but last night I noticed it when the car was still cool and the fan was even off...so I really think it has to do with the coolent - some sort of valve or something that is making that noise

fsttyms1

hummm mine isnt that bad and ive only heard it like twice in the last month (few times the month before) If i can catch it while in the city ill probably look into it further, problem is i usually hear it on the hwy and by time i get to where im going its stoped

ou sig

ya when I heard it last night I was about to go into the library to study...and it was cold outside so I didnt mess with it. I want to look into it further sometime soon though.