[520SC]

Today's radiator back flush did nothing to improve system performance. I was hoping to see a large camel-sized turd blow out of that pipe upon initial pressurization, but just a few chunks and a lot of gray water were present. The mechanic went through three cycles of 20 flushes/cycle. Nada. The result? No performance improvement. His initial checks (system pressure drop test, and exhaust gas contamination test) were negative. So, for my $243, I gained nothing...well, sort of. At least I know for sure that my primary (Griffin) radiator is not the problem.