I put a 180 in this weekend and have no heat problems. 210-220 seems a
little high with the stock stat and belt-driven fan.
How's your coolant level? If it's not high enough, you may not be
getting enough liquid into the heater core to make an impact.
Ken Allgood wrote:
>
> hmmm.. ok, well started to use the heat for the first time in my truck
> this fall, and found out, I'm getting almost no heat! Just some basic
> info. 1st - only mods are quick-d intake and gibson cat-back. 97 cc slt
> 5.2L. 2nd - I drive 30 min to work. About 5 min city, 20 min hwy,
> another 5 min city. I'll drive about 15 min, see my temp up to about
> 210-220, figure the engine is warmed up. Turn on the heat. I get about
> 5-10 seconds of BARELY lukewarm air before it goes cold again. Turn it back
> off. I drive down further. Meanwhile, I'm watching my temp gauge slowly go
> back and forth from 175(?!?!?) up to 220ish, and back down.. goes back and
> forth about every 30 seconds or so... I've even driven on the hwy at 70mph
> with od off for 10 min (little over 3000 RPM) to try to get it to warm up..
> no go.. I'm thinking thermostat, and since it's probably time to put in a
> 180 anyway (or maybe that isn't the best idea with this problem???)... I'm
> thinking the thermostat is stuck open... suggestions/ideas?? please
> help.. I don't wanna freeze my arse off and this means I gotta drive the
> little 4 banger Probe to work until it's got heat again.. hmmm.. also
> sounds like a good time to get some Autolite 3923's ;-) oh yeah, heat
> worked just fine last winter.
>
> Ken Allgood
> 97 CC SLT 5.2L
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