Not mentioned yet
Look for shiny lime green stain at WP weep hole
Pinhole leak in hose, only manifests itself under pressure. Will also prompt higher temps by way of losing system pressure. To catch, must open hood immediately after driving under load and before hole has a chance to pucker up. If lucky will (not always) leave aforementioned faint green stain in the engine compartment where it is shooting under pressure.
\'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!