Originally Posted by Dutchess B Body
I read on here about a gm bulletin saying to avoid flushing machines mostly for the transmission. Is a cooling system flushing machine safe to use?.
At first I thought you were asking something completely different. Basically, you just wonder if the rationale behind criticism of tranny flushers is the same for shying away from coolant flushers? If that's your question, then I say YES. As explained by others it's an expensive solution for a simple process, and comes with lots of ways of doing it incorrectly. We're all saying to do it right, do it yourself and do it manually according to the (simple, well-described, cheap) methods on the forum.
\'96SS SOB: SSRI, Herter Tune, Tri-Y II, , 3000 Edge, F/HO bars, METCO extendeds with CV MMC, Bilsteins, currently Vredestein Ultrac Sessanta (315/35 rear). Finally, wait for it... LT-4 knock module!
\'96FWB BUW-Butt Ugly White: PCMPerformance tune, HDFA w/ swissed filter, 1/2 SLP s.s. catback with H- and Flow Super 50s, oem opti rebuilt 3 times, SS Bars, METCO LCA, Airlift 1000, Monroe SS, PowerTrax No-Slip, CTS wheels with +1 rubber. Finally, yes again... LT-4 knock module!