well, you may discover something expensive or surprising, but you seem to be in-tune with getting the cars up to as high level of reliability they're capable of, and will save a little $$ as you do a few services yourself, so - that's good. Puts you way ahead of 75% of the car-owning public.

GOOD NEWS!

 

Sutible headgasket bandaid? was prestone the problem?

 

I was getting bubbles in my coolant slight smell of exhaust had prestone with nanotech sealant....

 

emptied entire cooling system

 

flushed with bluedevil radiator flush ran for 10 min drove around the block varified thermostat opened.

 

drained entire system filled with distilled water ran for 10 min drained entire system

 

filled with zerex "asian" coolent and added blue devil pour and go head gasket sealant. idled 50 min shut off and let cool

 

I have only drivin the car 70 or so miles but it was up and down carson pass which is nothing to sneeze at. I have checked and don't see coolant loss I had been having to add several oz or more every 30 miles so to prevent overheating from to much air space in the system.

 

will update at 100 500 1k miles I do plan on repairing the head gasket properly but for now this worked for me.

Here's hoping it worked.  but probably not.  Enclosed utube is interesting.

 

400 miles later, up and down mountain passes still running strong!