wth happened?

cre · 12-22-2009, 02:00 AM

Waterfall is indicative of air in the coolant system; It does not in any way tell you where it is coming from.

The decrease or absence of the waterfall sounds once the car is warm is either due to the coolant expanding to the point that the air can be and is pushed out of the system via the radiator cap or it is being whipped into the coolant and as such simply doesn't exists in large enough pockets for you to hear the coolant trying to push past it.

If you don't trust the radiator cap, get it tested.

If you replace it, test the new one. Toyota only sells two different types of cap for the MKIII, they work a little differently but the both behave the same way. The only other difference is the mount and sealing area.

TurboSupera · 12-23-2009, 07:05 PM

Quote:

Originally Posted by cre

Waterfall is indicative of air in the coolant system; It does not in any way tell you where it is coming from.

The decrease or absence of the waterfall sounds once the car is warm is either due to the coolant expanding to the point that the air can be and is pushed out of the system via the radiator cap or it is being whipped into the coolant and as such simply doesn't exists in large enough pockets for you to hear the coolant trying to push past it.

If you don't trust the radiator cap, get it tested.

If you replace it, test the new one. Toyota only sells two different types of cap for the MKIII, they work a little differently but the both behave the same way. The only other difference is the mount and sealing area.

So should I be concerned about the waterfall thing? I have that noise too at start-up and then I believe it's usually gone. Everything works fine, the car runs and boosts like it should, I do notice that I have to fill up the coolant reservoir about once a month or so. I do notice a couple of drops of what appears to be coolant after I turn off the car, just haven't had time to see where that is coming from. Thanks for the info.

cre · 12-23-2009, 07:51 PM

If there's a leak find it and fix it.

12-22-2009, 02:00 AM	#1
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Waterfall is indicative of air in the coolant system; It does not in any way tell you where it is coming from. The decrease or absence of the waterfall sounds once the car is warm is either due to the coolant expanding to the point that the air can be and is pushed out of the system via the radiator cap or it is being whipped into the coolant and as such simply doesn't exists in large enough pockets for you to hear the coolant trying to push past it. If you don't trust the radiator cap, get it tested. If you replace it, test the new one. Toyota only sells two different types of cap for the MKIII, they work a little differently but the both behave the same way. The only other difference is the mount and sealing area. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

12-23-2009, 07:51 PM	#3
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	If there's a leak find it and fix it. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

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