Z06 Senior Member
Join Date: Nov 2001
Location: Palm Coast, Fl.
If it is stuck open (and if the car doesn't warm up past 135 degrees that is the only reasonable explanation). IMO you should squeeze the upper radiator hose when your first start it (cold) and you should not feel the water running through the hose - it shouldn't be until the block water reaches the temp. that the stat was designed to open (say 170 degrees in my case). Have someone moniter coolant temp. from inside the car while you "feel" the hose and tell them when you feel the water gurgling through - that is the temp. that the stat opened.
If the water comes through the upper hose at a temp. lower than the advertised value of the stat get a new one or get your money back. If the stat opens as designed at 170 degrees the car will warm to that temp just as quickly as it would if you have a factory stat in the car, it just won't go above that temp. as fast (depending on when your fans are set to come on and if you are moving, outside temp etc).
Sorry this is so long, hope it helps.
[sold] 02 QS Z06 383 c.i.
441 RWHP 445 RWTQ, FLP Long Tubes & GHL Quads, 42# Injectors, LS1 Edit Tuning, Vararam w/T1 C. F. Bridge, Vinci 170 Stat, Ripper Shifter, Lowered and Tinted