Vannin' Home Forums Chevy Troubleshooting G20 Heating issue

I assume the blower works? There is a valve on the heater core hoses. I have one even though I have no A/C. Check to see if there is vacuum present at the valve with the heater on. There should be no vacuum, if there is remove the line and plug it. The valve fails safe, meaning if something should go wrong you still have heat. Have heat? I struggled the first 2 winters with my van. I had to put cardboard in front of half radiator to get it to heat up. What I did eventually find was that my heater core was half plugged up. I swear by this, and that is to drain all the coolant at the radiator drain plug. and refill with water and 2 loads of liquid Tide, remove the thermostat. Drive the next 2 days like that. Then Run just water to rinse it out one more day. This worked for me as I didn't feel that bad about dumping water and soap in the driveway. I was horrified by what came out. This is hard to do in the winter as chances are it will freeze and break things. I am running a 160 stat and a 16 pound cap on a plastic tank radiator, motor has 200k on it. I have good heat. Warms up in 15 min. It did all sorts of stupid to figure this out.

I am not picking on you or anything just curious.What kind of coolant is blue? I prob saw it somewhere just been awhile since I saw anything except green.You keep mentioning ,possible electrical .

http://www.eurocarparts.com/blue-antifreeze

http://www.walmart.com/ip/Super-Tech-Antifreeze/16645420

http://www.amazon.com/Subaru-MIXED-SUPER-COOLANT-SOA868V9270/dp/B007NLOZAU

Thanks man I figured it was out there I usually just stick with what works.and the green works for me.By the way wal-mart anti-freeze is green just a blue bottle.I have a bottle of it in my 84 right now. I also noticed this has blue in it as well
bars leaks linky

Thanks For everyones help on this. I had to take the van to my mechanic. My thermo was shot, he also flushed the system, and threw in a new blower motor.Basically did all three! My van was kind of seldom used when I got it, Imaginably the main culprit was the build up in the system, but I will truly never know. Heat is toasty and noticed the blower is much stronger now.
This is the kind of thing I wish I could have tried myself...but without a garage not really happening!