Low temp thermostat causing lukewarm heater output?
My Caprice, with a warmed over LT1, has always blown lukewarm air from the heater. My mechanic blamed the 160F thermostat, but my Mustang Cobra has a 160 stat too and has no problem blowing HOT air from the vents. But of course they're two totally different cars, so not apples to apples.
I've flushed the heater core a couple times in the 8 or so years I've owned the Caprice, and it seems like it maybe blows a little warmer air after I do so, but if there is a difference, it's not significant. The car has an F-body cluster in it and the temp gauge needle typically stays halfway between the first notch (160) and second notch (not denoted), although it sometimes goes above the second notch in the summer.
My gut feeling is that the heater core is partially clogged, but I figured I'd see what the consensus is before I commit to a heater core replacement project.
--'94 Caprice "SS" wagon, 0.30 over, high-volume oil pump, LT4 hot cam, 1.6:1 rockers, ported aluminum Corvette heads, shorty headers, PCM4Less tune, 4.10s, shift kit, side-exit dual exhaust with Flowmasters, OR X-pipe, F-body gauge cluster, Bonneville front and rear seats (working electrics), Bravada console shifter, Bilsteins, 12.7:1 Impala steering box, Boss 338s with 255/45R20s, bunch of other stuff I'm forgetting.
--'04 Mustang Cobra, '15 Audi S4
--1125R, 1050, VMax, VFR800, DRZ-400E