Thank you! Glad it worked out. After the first few flushes I thought I did something wrong. Was relieved when the water started to get lighter. Engine has been running great!
@@oldsguysgarage when the "stop leak" coolant dried, was there any white residue ? Had a subaru that blew the radiator (son was driving so information is sparse), but it splashed all over the engine bay and when it dried, there was this white crystalline powder. Tow guy said that was stop leak.
@@DanTheManIOM I wouldnt know. As far as I know stop leak was never used on the old radiator in the 72 cutlass. There was what appeared calcium buildup of sorts in coolant passages of intake manifold before system was flushed. Could a stop leak have contributed to the buildup perhaps, but It was put in by me and the car sat for so long I dont really know what it was.
@@oldsguysgarage from sitting and tap water, I think we get calcium carbonate deposits. They were super hard in the eldo radiator (car sat 22 years), but I put vinegar in and they were soft, and gooey, like that teflon paste thread sealant. I don't care, it;s flush it out, brownish coolant and rusty bits, vinegar sitting in there now, in the radiator. I'll let it sit as I work on other things on teh car maybe in a few days, start it up and let it circulate to clean it, drop it out, and refill and test it, that is the plan, FWIW.
10 flushes ? I hope not. My coolant in the 77 Eldo looks like 5 right now and the car sat 22 years. I drove it home with heat on, not knowing heater core might be shot. After I got it home, I found out, The radiator took 2 gallons of coolant ! Total system holds 6 gallons. Radiator has heavy scale on the tubes. Vinegar ? CLR, IDK yet. Doing the bumper fillers and paint. If it looks better, it will fit in better with my neighbors.
The bottle says run it for 4 to 6 hours. You can do it over multiple days or weeks. Have to drain the coolant first though. Then fill with distilled water.
