Mike is right. Just recoring your rad won't guarantee that your engine will
run cool.
I rebuilt a U20 last year. When I tore it down, all the internal
passageways were gunked up. I had the U20 block hot-tanked. It came back
clean.
But I was surprised when I found pieces of loose casting metal inside some
passageways. Some of these were about a quarter-inch thick and 2 or 3
inches long. I fished them out, and used a dremel tool to clear some of the
other obstructions. After the rebuild, the engine never runs hot. But if I
didn't clear those passages who knows what could have happened. Sooner or
later I would have had a blockage preventing the coolant from circulating.
Fred - So.SF, CA
BADROC
P.S. I also did a 3-row recore.
______________________ Reply Separator __________________________
Subject: Re: Another Radiator question
Author: "datsunmike" <datsunmike@nyc.rr.com>
Date: 8/4/2000 7:25 PM
Pat,
Well the rads certainly help but I think the newer engines also have better
internal cooling passages and routing too.
66 Mike
----- Original Message -----
From: Patrick J. Horne <horne@cs.utexas.edu>
To: Marc Tyler <mtyler@hctc.net>
Cc: roadster List <datsun-roadsters@autox.team.net>
Sent: Friday, August 04, 2000 10:46 AM
Subject: Re: Another Radiator question
> Bend a paper clip of other small wire into an "L" shape with the short
side being about
> 1/8".
>
> Slide the clip in between fins from the front of the radiator until the
wire comes out the back. This
> is best done right against either the top or bottom tank.
>
> There are tubes that run from top to bottom with the fins between them.
Use the hook to feel
> how many tubes there are as you slowly pull it out. You will feel 2, 3,
or 4.
>
> In more modern times it was discovered that adding more rows was not the
best way to get the
> most cooling out of a radiator. The newer high efficiency radiators have
more than twice as
> many fins as the older ones. This really helps on the cooling.
>
> Peace,
> Pat
>
> > List,
> > Is there a way to determine by looking how many rows a radiator
has?
> >
> > -Marc T.
>
>
> --
> - Support Habitat for Humanity, A "hand up", not a "hand out" -
> Pat Horne, Network Manager, Shop Supervisor, Future planner
> CS Dept, University of Texas, Austin, Tx. 78712 USA
> voice (512)471-9517, fax (512)471-8885
|