Charley,
Your assumption about my thermostat is not correct. I replaced and
checked the thermostat several times. This was the obvious item to look at
first and I did look at it. I had fitted a 180 degree thermostat.
If I recall correctly, early Bs did not have the oil cooler -- does yours?
Also, hot (warm) water is circulating through the heater matrix irrespective
of whether the thermostat is open or closed. This will provide cooling.
Have you made any other changes from original (electric fan, perhaps) that
would help cold weather performance?
Simon
>From: Charley & Peggy Robinson <ccrobins@ktc.com>
>To: Simon Matthews <simon_atwork@hotmail.com>
>CC: mgs@autox.team.net
>Subject: Re: Decent Heat
>Date: Fri, 15 Oct 1999 15:11:03 -0500
>
>Hi Simon,
>
> I'm afraid you've drawn the wrong conclusion from your expreience with
>the '74 B. I have a '69 B that comes up to temp and puts out plenty of
>heat in sub-freezing weather. You probably had a 160 degree thermostat,
>or maybe none at all in the engine which kept it from warming up more
>than that.
>
> The thermostat opens at its preset temp (approx) and that's as cool as
>the engine can run. After that the engine temp is up to the cooling
>system in whatever driving conditions are encountered.
>
> Charley Robinson
> '69 B
>
>
>
>Simon Matthews wrote:
> >
> > Pre-'75 cars will not come up to temperature in cold weather, whatever
>the
> > thermostat -- remember the oil cooler is also providing engine cooling
>and
> > some water goes past the thermostat.
> >
> > I know this because I drove my '74 MGB (US spec) 70 miles during one
>trip
> > when the temperature gauge barely moved off the low mark.
> >
> >
> > Simon
> >
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