Re: IML: Thermostat issue 160 or 180

["Gary Wilson" <mopar413@xxxxxxxxxxx>]

You would have to put a lot of miles on an engine in order to ruin the heads 
even if they still have the early valve seats.  If you run  a quart of ATf 
thu the gas tank once in awhile they old valve will last a long time.  I had 
69 super bee that I installed a 64 413 in it and ran it really hard.  Never 
had any problem with the valves.
----- Original Message ----- 
From: "PAUL WENTINK" <randalpark@xxxxxxx>
To: <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Wednesday, October 24, 2007 3:12 PM
Subject: Re: IML: Thermostat issue 160 or 180


None on my Imperials ping or spark knock, and they have the correct
thermostat. They have been "de-tuned" to run on today's fuel, which
will eventually ruin the engine. That is until I have the cylinder
heads reconditioned to handle unleaded gas. In the meantime, I try to
use them enough to keep the gas fresh, and not enough to burn up the
valves over the weekend.

Paul W.


-----Original Message-----
From: spicemanii@xxxxxxx
To: mailing-list@xxxxxxxxxxxxxxxx
Sent: Wed, 24 Oct 2007 1:41 pm
Subject: IML: Thermostat issue 160 or 180


This could be for anyone who has issues with deceiding which thermostat
to use, in Imperials or any other vehicle.
Fisrt, like kenyon said, Chrysler engineered what was best, but, at
that time, gas was what I use in a term as better gas. Gasoline has
been altered since these were built. The closed chamber design heads,
for example, 58 thru 67, do not like the fuel we have to buy today. I
have experimented for years here in the desert and the cure was an open
chamber from 68 and newer. And, without going thru all the other issues
involved here, since this is a thermostat talk, yes, after it opens,
they all flow water about the same.
But, with the pinging issue here when an engine is forced to run
hotter, as a 180 will do, I have control sooner if it opens at 160
there about, I have less of a chance for a pinging situation than
waiting till it is 180 opening where I guarantee myself to ping. Their
is a bad when running cooler. Less fuel mileage and you loose a bit of
performance because the oil is thicker. Their is a perfect point for
these all to meet. But, it will not happen with air conditioning,
traffic, mountains, altitude, your foot, the weight of the vehicle,
gear ratio and so many other things.
So, I run a 160 because of the desert with way less humidity.
When these cars were new, owners traveled thru the desert at night.
My 61 Imperials all came with a 22 inch radiator. Not big enough for
todays traffic and driving the desert all day or climbing a grade with
these heavy cars and keeping the air on. Signs used to say, "Turn off
air conditioners to prevent overheating" when pulling a desert
grade. This is not the end of this, it has so many other facets, you
would be bored. joe machado
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