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>
|