Well, since you asked.
I recently had to replace the thermostat in my 1995 Mazda Miata (OK, that is
a trifle older than 10 years). Since the thing failed CLOSED I also had to
replace the radiator which burst from the pressure built up when the engine
overheated (which implies that the pressure relief feature of the radiator
cap also did not work as intended). The car has been maintained per Mazda
recommendations.
As for failing in the open position, consider that it normally cycles with
engine temperature and therefore can jam in either the open or closed
position.
Best regards,
Rob Housman
A070
Airframe complete
Irvine, CA
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com]On Behalf Of Raimo Toivio
Sent: Thursday, November 16, 2006 8:39 AM
Subject: Re: Europa-List: Oil cooler thermostat
Vaughn,
I cannot be absolutely sure but NORMALLY
thermostat design itself leaves it fully
open in failure situation.
Who knows ANY broken thermostat in
cars (younger than 10-20 years)?
Problems may occur if the coolant liquid
is NEVER changed.
In cars most people never do it IMHO.
Just like brake fluid, it should be changed
regularly (lets say once a 1-3 year
to remove moisture and small obstackles etc).
May I suggest you to go some car spare shop,
keep it on your hand and look at it carefully?
Regards, Raimo
----- Original Message -----
From: Europa List <mailto:n914va@bvunet.net>
Sent: Thursday, November 16, 2006 4:57 PM
Subject: Europa-List: Oil cooler thermostat
I would be very inclined to go with a water thermostat, but I have one
question. If it fails, does it fail closed or open?
Vaughn
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