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Daaaan

hissing sound with the radiator...

6 posts in this topic

Is it because i have a very small crack in the radiator that i hear a rythmic hissing sound, about every 1/3 of a second? I have to mention that i loose about a tablespoon of coolant every day i go out, so it's not that big a crack...

Or is it something with the radiator cap, maybe it can't hold the pressure properly?

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the cap may be a different issue. to fix a small leak I would pick up some Bars Leak from the auto parts store and use as directed.

They maybe able to test your cap too.

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the cap may be a different issue. to fix a small leak I would pick up some Bars Leak from the auto parts store and use as directed.

They maybe able to test your cap too.

I suppose "Bars Leak" is some sort of high-temperature adhesive used to fix holes in aluminium? Sorry, i am from Romania...we don't have that brand of adhesive here.

Regarding your suggestion that they may be able to test the cap...well...I think mentioning my location is enough :busted::banana:

So...the cap can be an issue if it doesn't seal the radiator properly? Can that valve on top be damaged?

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Some high temperature silicone should be able to plug up the small leak.

Because it is a continual, rhythmic sound, I would guess it is just the pressure put out by the water pump as the vanes on the impeller spin, creating a tiny surge in pressure, causing a bit to squirt out of the crack and vaporize on hot metal.

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Some high temperature silicone should be able to plug up the small leak.

Because it is a continual, rhythmic sound, I would guess it is just the pressure put out by the water pump as the vanes on the impeller spin, creating a tiny surge in pressure, causing a bit to squirt out of the crack and vaporize on hot metal.

Best answer so far, in my oppinion... :busted:

Would there be any damage to the water pump or to anything else if i run the engine like this, or is the adhesive / silicone mandatory? The water loss after 2-3 hours of engine running is about 1 tablespoon...

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You need to find an additive for your radiator to stop leaks (auto parts store), you just pour it in, but you probably only need to add a little of it? You are not leaking very much fluid, drive it like it is, but pay close attention to it. Remember a bad crash can take out a rad, wait untill you really need to have it fixed or replaced!! Take the plastic shrouds off and go for a ride and see if you can find where the leak is?

http://www.barsproducts.com/C16_R6.htm

http://www.amazon.com/gp/product/B000AME522

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