Old 07-15-05, 03:30 PM
Thread Starter
Join Date: Sep 2002
Location: illinois
Posts: 67

Is crud buildup at the radiator neck a common problem with dex-cool,how serious is it I've heard that it can damage your heater core and engine?
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Old 07-15-05, 06:40 PM
hspr's Avatar
Join Date: Jun 2005
Location: Ontario, Canada
Posts: 106
Crud build up at the filler neck is normal for dex-cool. I believe it has to do with how it reacts to air since it also tends to be found around hose clamps. As far as I have seen it doesn't move throughout the system, so as long as the fluid itself looks good I wouldn't worry.

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