<VV> "Lazy" Thermostat?

[John Headley]

Hi All,

Been working on a few last minute items before the
winter stops me from doing any more.  I had asked
about adjusting thermostat doors when putting on the
shrouds I recently acquired.  I did one side and took
it for a spin, and the door opened when it got hot, no
problem.  I did the other side later because I wanted
to see if an oil leak was fixed (it was).  When I went
for a spin, this side didn't open at all (passenger
side).  I had to block it open to go the rest of the
way back home.  The adjustment pin was almost all the
way to the end of travel (end of the rod), but still
the door didn't budge.  I thought these were designed
to fail open.  Mine definitely had to be pulled out to
attach the door (doesn't seem failed), so what gives? 
Do they ever get "lazy"?  Do I have a part problem or
an adjustment problem?  Advice is appreciated.

Vehicle is a 64 monza w/110.

-John Headley
64 monza convert
Royal Oak, MI

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