Adam,
It may be an unfortunate coincidence. Things like that do happen and it's
maddening. You fix one thing and something else breaks.
My neighbor with a Volvo has that problem all the time.
Or as Forrest Gump said: Shit Happens.
Mike
----- Original Message -----
From: "Adam Bradley" <ambradley@yahoo.com>
To: "Ronnie Day" <ronday@home.com>; "Roadster List"
<datsun-roadsters@autox.team.net>
Sent: Friday, June 08, 2001 8:01 PM
Subject: Re: It's the head gasket
> Agreed, and I certainly appreciate everyone's help. The car ran pretty
> well before this water pump/electric fan operation and I didn't change
> anything else - timing, point gap, etc. It all stayed connected. The
> car runs pretty much the same - in fact, aggrivatingly well - except
> for the overheating and pressure building in the coolant.
>
> Adam
>
> --- Ronnie Day <ronday@home.com> wrote:
> > > Well, after flushing and burping and still overheating, I'm pretty
> > sure
> > > it's the head gasket. The car actually runs cool enough if it just
> > > idles, but once it gets up to speed and under load it heats up too
> > > quickly.
> > >
> > > I noticed that the water level in the overflow tank keeps rising
> > and it
> > > is covered with a frothy white foam. I assume this is from the air
> > in
> > > the system pushing the water out and some of the air rising to the
> > top
> > > (the foam). If I'm mistaken about this, please let me know.
> > Otherwise
> > > the parts are going to be ordered soon, the electric fan is staying
> > on,
> > > and the head's coming off and going into a machine shop.
> >
> > It could be the head gasket. In fact the "white foam" sounds like oil
> > in the
> > water. Air bubbles just dissipate, doesn't any kind of residue. Have
> > you run
> > a compression check? Can't hurt, but then you can have a leaking head
> > gasket
> > that's not into a cylinder.
> >
> > Regarding the timing, if it's off it could cause over heating above
> > idle,
> > too. Set the points first and then set the timing. Does it still
> > overheat?
> > Changing the point gap or the dwell changes the timing. That's why
> > you set
> > the points first, then do the timing.
> >
> > Like I said before, be methodical, do one thing at at time. Don't
> > jump to
> > "obvious" conclusions. Verify suspicions by testing. Trust me it'll
> > cost you
> > less in the end.
> >
> > HTH, Ron
> >
> > Ronnie Day
> > ronday@home.com
> > Dallas/Ft. Worth
> > '71 510 2-dr (Prepared Class Autocrosser)
> > '73 510 2-dr (Street Toy)
> >
>
>
> =====
> Adam
> '70 1600 SPL311-28181
> http://www.picturetrail.com/abend
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