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Old 05-12-2004, 02:57 PM
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antifreeze is foamy

what would cause antifreeze to be foamy?

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Old 05-12-2004, 03:23 PM
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Probably lack of pressure. Does this occur only when the radiator cap's off? The other thing is, is your radiator mounted lower than the engine heads? If it is then you may need to fit a surge tank to allow the air pockets to rise above the engine. I doubt you'd have a blown head gasket.
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Old 05-12-2004, 03:42 PM
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radiator is above motor. it is in a 72 chevy truck.
I was checking my antifreeze when I got home, and I noticed that when I lifted up on the tab on the cap, nothing spewed into the resevoir. When I took off the cap it was all foamy white.
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Old 05-12-2004, 06:46 PM
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foamy & white, eh? did it look kind of like Irish Cream?
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Old 05-12-2004, 06:47 PM
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uh oh.... foamy-yellowish cap?

head gasket, or crack.
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Old 05-12-2004, 06:50 PM
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Low coolant level will make it foamy......................Before suspecting a bad head gasket or cracked head, make sure it is full and drive it a bit.
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Old 05-13-2004, 05:12 AM
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Blown head gasket would pressurize your system, have you flushed the system recently? residual flush solution will foam up if not completely flushed out!
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Old 05-13-2004, 06:24 AM
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Quote:
Originally posted by Wrencher
Blown head gasket would pressurize your system, have you flushed the system recently? residual flush solution will foam up if not completely flushed out!
not always true....

as with my old cutlass the cracks were in the intake area, so it was'nt even noticed.
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Old 05-13-2004, 07:22 AM
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I'd say lack of pressure or a gasket
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Old 05-13-2004, 08:55 AM
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Lightbulb

Have you mixed orange/green prestone ?
Mix those two type of prestone give pretty weird results..
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Old 05-13-2004, 09:16 AM
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Quote:
Originally posted by 87442lover
not always true....

as with my old cutlass the cracks were in the intake area, so it was'nt even noticed.
That's why my reply stated " head gasket!! Not crack!
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Old 05-13-2004, 09:40 AM
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it was foamy white. has not been flushed. did not mix orange and green.
wouldn't a blown head gasket make it run funny [rough]?
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Old 05-13-2004, 06:01 PM
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Quote:
Originally posted by toddtheodd
it was foamy white. has not been flushed. did not mix orange and green.
wouldn't a blown head gasket make it run funny [rough]?
Not necessarily........................depends if it is causing a compression loss, or fouling plugs etc.
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Old 05-13-2004, 08:27 PM
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Did you put any of that coolent system cleaner through it? I did that one and didn't make sure to flush it out all the way and had foam.
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Old 05-14-2004, 05:27 AM
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Check Oil....

Take off your oil filler cap. Is there a grey film on it?? If so I say youve got a cracked cylinder or head gasket problem. And I'd quit driving it right away the moisture is killing your bearings.
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