As a 1997 GL owner without heat for 2+ years(couldn't afford $500 fix), I searched and read alot of guides & suggestions on what to do to get some heat. I had the cooling system drained, filled, flushed, drained & filled again. No heat. Then I read & studied OLDWAGON's "how-to" backflush my heater core. His pictures were GREAT so decided to give it a shot.
I went to Lowes and found everything I needed. I even bought a 6' length of clear tygon for dramatic "crud detection" effect. I followed the pictures to a 'T" and started the procedure. Had my son turn on the water and WOW! The water turned cloudy right away! Then it cleared up. I did the off & on surge technique and MORE cloudy water. After 10 minutes or so I noticed I had forgotten to clamp off the bypass hose(so much for following to a "T"). I rag padded & visegripped the hose (not too tightly), turned on the water and HOTDOG, ever MORE cloudy water! Surged it again several times & stopped.
Hmmm... remembered about the CLINTON "purge" and decided to give it a shot. Disconnected the supply garden hose from the heater return and "self-conciously" purged & flushed until I couldn't get anything cloudy through the tygon connected to the heater core inlet hose. Reinstalled everything, refilled & fired 'er up!
Approx 10 min later the WONDERFUL smell of HEAT permeated my ol' taurus. It was 30 deg outside but I had to turn the heat way down to less than half way. All I can say is thanks to everbody who gave me the courage to try something I had ALOT of self doubts about trying.
NOTHING went wrong, NOTHING leaked and I actually look forward (kinda) to Michigan winter weather (If I don't have to shovel)... '-) I'm really a HAPPY CAMPER!!!!! Thanks Again!! Sorry if too wordy...