[Chevelle-list] Thermostat ?'s

[Dale]

All 66 V8s w/o A.I.R. came with 180 degree stats, those with A.I.R. came
with 195 degree stats.  Cylinder wear can occur with too cool an engine as
well as too hot an engine.  Published optimum performance figures I've seen
for water temp is between 170 and 185 or so and optimum overall operating
water temp is about 180 to 200.  If it runs fine now and doesn't overheat
with the 195, I'd use the same. With summer coming on, the 180 may give you
a little more buffer zone against overheating when caught in traffic if
that's a concern.

 

I've heard of drilling a hole in the stat, either 1/16" or 1/8", especially
on a big block when the bypass hose is removed. Many new cars come with a
bleed hole (or holes) in the stat to avoid trapping air. Drilling a hole is
free and couldn't hurt if your replacement doesn't have one. You can do some
research on the web and, for the price of a gasket, remove the stat and
drill a hole in it.  People will say they've run stats for years with no
stinking hole in them and never had a problem.  People used to drive on
2-ply/4-ply rating bias tires too but technology moves on.  :*)

 

Dale McIntosh

 <http://www.chevellecd.com> 1966/67 Chevelle Reference CDs

ChevelleStuff.com <http://www.chevellestuff.com> 

ACES #1709/TC GOLD #92 <http://www.chevellecd.com> 

 

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From: chevelle-list-bounces at chevelles.net
[mailto:chevelle-list-bounces at chevelles.net] On Behalf Of
66chevelless396 at comcast.net
Sent: Thursday, April 26, 2007 3:43 PM
To: Chevelle List
Subject: [Chevelle-list] Thermostat ?'s

 

I am replacing a leaking thermostat gasket and will replace thermostat while
apart.  Currently it has a 195* and works fine holding temp a 195*.
Autoparts store suggested to put a 180* to run it a little cooler.  Good,
Bad or Indifferent? 

 

Secondly:  I have read in the past about drilling an 1/8" hole in the
thermostat flange to relieve an air bubble if it forms at the thermostat.
Anyone do this? Autoparts store said many already come with a hole.  The
Stant I bought did not.

 

Thank you,

 

Krister Meister

'66 SS #'s



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