I believe Mike is right, and remember reading previous threads on the list
about the problem of no thermostat.
Basically, you get a mix of hot and cold spots in the cylinder head that
cause warpage. The reason for the thermostat is to regulate an even
temperature throughout the head. Even with the thermostat closed, I think
there is a small hole that allows some water to flow during warmup. Some
people drill a wider hole to increase this flow, thereby allowing the
engine to run cooler. But don't do this unless you do some homework!
Fred - So.SF
________________________ Reply Separator _________________________
> Subject: Re: Thermostat stuck!
> Author: "Mike Kerr" <email@example.com>
> Date: 4/13/2000 10:50 AM
> "What are the disadvantages, if any,of running a motor without a
> thermostate" you get to buy a new head :-)
> Mike Kerr
> Restoration Products
> 3730 todrob Ln.
> Placerville, CA 95667
> Ph# 530-644-6777
> Fax# 530-644-6777
> E-mail firstname.lastname@example.org
> Web; innercite.com/~wolfgang
> -----Original Message-----
> From: nruff <email@example.com>
> To: datsun list <firstname.lastname@example.org>
> Date: Thursday, April 13, 2000 9:45 AM
> Subject: Thermostat stuck!
>>What are the disadvantages, if any,of running a motor without a thermostat
>>(in the summer months anyway)?
>>Several weeks ago, while tuning my carbs, I reached over and felt the
> top >radiator hose--it was cold, but the rest of the motor was
> definitely HOT. I
>>killed the key and could hear the coolant boiling inside the motor for
>>several seconds! (no apparent damage yet) After letting the motor cool,
> I >pulled out the thermostat and have left it out since. Now the motor
> seems >to have no cooling problems. Obviously, it will take the motor
> longer to >reach operating temp but beyond that, is there really any harm
> to leaving it
>>out? I definitely don't want to risk having the thermostat not open
> again. >
>>What do ya think?