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#16
11-14-2009, 11:35 AM
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Re: DCCV in 2002 LS V6
The car had only 20k on it when I purchased. I have 125k on it now. I don't think the dealer ever flushed my radiator during services. I also don't think anything has ever been aded to it (stop leak). That was my first thought as well. The stuff in the lines was light brown and hard as clay. It took me hours just digging this out of all my hoses connected to the DCCV. Now it's clean and still blows cold so it must be the DCCV. I'm back @ square one now. It could also be my heater control valve. Evereything looks the same under the hood so I can't distinguish where it is. Any ideas? Thank you again for all of your help.
FYI, this clay buildup had completely blocked the DCCV and all the hoses attachted to it. It seems like it didn't get into the motor etc though. So it must have started just recently but that's what is so strange cause I haven't added anything to the radiator. If oil and radiator fluid mix will it turn hard? Thx again JP 
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#17
11-14-2009, 11:52 AM
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Re: DCCV in 2002 LS V6
Did you bench test the DCCV, when it was off the car?
0volts/12volts is used to trigger both solenoids to open or closed! 12volts, if you apply air pressure with a cupped hand on the water inlet, the air shouldn't come out of both outlets. 0volts = The air should come out of both outlets. I had to use WD40 , clean, 12volts + mussle the solenoids to work again! The DCCV is a Dual electronic contol solenoids for coolant, the pistons can get seized, and the DACT loses control. Like a bad fuel injector, or spouse! Just because you got a signal + sound doesn't mean that it's working. Do a LS forum search tool ''DCCV'' ,not thread. Goggle ''Troubleshoot LS DCCV'' Last edited by danielsatur; 11-15-2009 at 03:07 PM.
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#18
11-14-2009, 10:36 PM
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Re: DCCV in 2002 LS V6
Quote:
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#19
11-14-2009, 10:36 PM
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Re: DCCV in 2002 LS V6
The DCCV is the heater control valve, so you don't need to spend any time looking for a heater control valve.
I've never heard of oil and coolant forming a hard substance. The DCCV solenoids actually close the valves when voltage is applied, so no voltage would be full coolant flow if the DCCV is working properly. However, if the hoses really are all plugged, you won't get flow and therefore no good heat. As you suspect, the build up may be preventing the solenoids from moving properly. -Rod
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#20
11-16-2009, 11:17 AM
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Re: DCCV in 2002 LS V6
When you trigger the dccv with 12volts, the build up of gunk will cause one or both pistons toget stuck in coolant off pos. ''No Heat''
In most cases, it looks like neglected coolant services, it's once every 5years! Last edited by danielsatur; 11-18-2009 at 09:48 PM.
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