That's a valve from the early cars and the one I have. As soon as you
mentioned square base I recognized it. The water will not gush out and
there's probably crud blocking the passageway of the valve making the
coolant come out even slower. When I removed the plug on my block I saw all
kinds of crud blocking the passage. I used a Dremel before I brought the
block in for machine work and boiling.
Mike
----- Original Message -----
From: "L Jordan" <ay107@lafn.org>
To: "roadster" <roadster@rcn.com>
Cc: "Datsun Roadster Mailing List" <datsun-roadsters@autox.team.net>
Sent: Friday, January 01, 1904 5:12 AM
Subject: Re: No Thermostat
> Fred,
> i haven't heard the" brass vs steel "argument yet, what is your preference
and
> why? And how often are the freeze plugs removed and cleaned?
>
> Also the block plug on my 1600 which looks like a big flat head screw
does not
> seem to come all the way out, is it supposed to? Or do you have to remove
it by
> it's square base into the engine itself if you wanted to put some kind of
valve
> there to make it easier to back flush? The water is just trickling out .
> thanks,
> Linda
>
> roadster wrote:
>
> > Linda,
> >
> > Place the tip of a flat-blade screwdriver on an edge of the freeze plug,
and
> > whack the screwdriver with a hammer. The freeze plug will rotate in the
> > hole. Then you can grab the freeze plug portion sticking out of the
hole,
> > with a large-jaw pliers and pull it out.
> >
> > The freeze plugs are not reuseable, as they get bent in use and removal.
> > Besides, they're cheap, couple bucks apiece if that. They go back in by
> > placing a socket of the same diameter in the freeze plug, and then
tapping
> > them in with a mallet. There are different opinions about using brass or
> > steel freeze plugs and I'm sure you'll hear them but you decide which
you'll
> > use.
> >
> > Fred - So.SF
> >
> > ----- Original Message -----
> > From: "L Jordan" <ay107@lafn.org>
> > To: "datsunmike" <datsunmike@nyc.rr.com>
> > Cc: "Datsun Roadster Mailing List" <datsun-roadsters@autox.team.net>
> > Sent: Saturday, June 09, 2001 9:34 AM
> > Subject: Re: No Thermostat
> >
> > > Mike,
> > > How are the freeze plugs removed and are they reusabe?
> > > Linda
> > >
> > > datsunmike wrote:
> > >
> > > > I did the same with my blocks too. I couldn't believe how much
casting
> > flash
> > > > was in the water jackets.
> > > >
> > > > I also used a dremel tool to smooth out the water passages and take
the
> > > > sharp edges off where I could especially by the waterpump. I did the
> > same to
> > > > the head.
> > > >
> > > > Mike
> > > >
> > > > ----- Original Message -----
> > > > From: "roadster" <roadster@rcn.com>
> > > > To: "Charlie" <cehubbard@home.com>; "Datsun Roadster Mailing List"
> > > > <datsun-roadsters@autox.team.net>
> > > > Sent: Saturday, June 09, 2001 2:38 AM
> > > > Subject: Re: No Thermostat
> > > >
> > > > > Charlie,
> > > > >
> > > > > Something sounds wrong with your engine overheating situation. You
say
> > the
> > > > > block has been flushed twice?
> > > > >
> > > > > A couple years ago when I had my block flushed, I checked the
water
> > > > jackets
> > > > > before doing any rebuilding. I was shocked to find pieces of metal
> > casting
> > > > > inside the jackets. Some of these pieces were several inches long.
I
> > > > fished
> > > > > them out thru the freeze plug holes. You can imagine that metal
debris
> > > > like
> > > > > this can impede the flow of coolant in the engine, and that other
gunk
> > can
> > > > > build up behind it creating a blockage. (After assembly, the
engine
> > never
> > > > > ran hot.)
> > > > >
> > > > > This was no fault of the block tank flushing. It was a by-product
of
> > the
> > > > > manufacturing process. A long time ago another 2000 engine block
of
> > mine
> > > > had
> > > > > a constricted passage, and I opened it up by breaking off the
metal
> > > > casting
> > > > > that constricted the flow of coolant from the block into the
cylinder
> > > > head.
> > > > > The engine ran cooler after that.
> > > > >
> > > > > Not saying that this is the situation with yours, just a
possibility
> > to
> > > > > investigate.
> > > > >
> > > > > Fred - So.SF
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "Charlie" <cehubbard@home.com>
> > > > > To: "Datsun Roadster Mailing List"
<datsun-roadsters@autox.team.net>
> > > > > Sent: Friday, June 08, 2001 6:56 PM
> > > > > Subject: No Thermostat
> > > > >
> > > > > <snip>
> > > > > > I don't have a thermostat in my car and it runs at about 230
> > > > > > deg.
> > > > > >
> > > > > > Before you start...I removed a stuck/bad thermostat in order to
do a
> > > > test
> > > > > > drive. My engine was just rebuilt and the block has been flushed
at
> > > > least
> > > > > > twice. The radiator has a brand new triple core. My timing is
dead
> > on 16
> > > > > deg
> > > > > > BTDC and the carbs are running a little rich. The heater valve
on
> > the
> > > > > engine
> > > > > > is closed.
> > > > > >
> > > > > <snip>
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