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radiator flush - READ ONLY

45 messages,  Last post on Nov 21, 2001 at 6:17 AM

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#41 of 45 It needs to say "DEX-COOL" somewhere on the front somewhere. by adc100 Nov 12, 2001 (5:30 am)
I believe that DEX-COOL was developed by Texaco in conjunctionn with GM. Allegedly to provide a lifetime coolant, but more specifically to address the problem of GM's leaking intake manifolds on their aluminum head V-6's. The DEX-COOL has been linked to turning jelly-like in the coolant system. I can't prove it personally though. I would think though that this would occur after a long period of time possibly with some other problems in the engine. If I were you I would not rush out to change until the stuff is in there for say 30K or so.
#42 of 45 Never mix red/orange and green without a flush by q45man Nov 12, 2001 (5:39 am)
When incompatable coolants are mixed [not flushing out the system completely], they can react forming a gel IF left in years without changing. The problem is seen most often when the radiator is only drained [< 40% of total coolant].
#43 of 45 I've been told by gsleve Nov 18, 2001 (2:01 pm)
that a backflush kit usually involves a tee valve in one of the heater core hoses, then screw in a garden hose on the tee valve turn on water open radiator cap and petcock run engine 20min or 30min usually will flush the system including the heater core
#44 of 45 Coolant quantity by joe3891 Nov 19, 2001 (9:15 am)
When you read cooling system capacity does it also include the amount in the overflow tank to the cold level.
#45 of 45 Flush kits by adc100 Nov 21, 2001 (6:17 am)
They are another weak link in your coolant system integrity. Both times I have installed them I developed a hose failure there. If you are going to use one, buy a new OEM heater hose and install it before you put on the new hose (double clamp it)

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