On my 1968 Ford Falcon I had a similar problem. Simply flushing the
coolant out of everything didn't help. I had to have the engine
pressure/power flushed. I found one radiator shop that had a high pressure
water system that looked like it could have put a clean hole right through
a 2 foot brick wall. The car had been sitting for years and apparently had
collected a lot of debris (rust, dirt?) in the water chambers inside the
engine... Just an idea...
Geoff
This one time, at band camp, Tab Julius wrote:
>
> I've been in the middle of this myself. My '78B (your message quoted here
> doesn't say which year you have) is often running hot. Never below 70%,
> often up to the edge of the red.
>
> Various solutions are (not in any particular order):
>
> - New thermostat
> - Flush radiator
> - Flush the thermostat housing
> - Flush the heater
> - Replace or recore the radiator
> - Sufficient coolant
> - Make sure the thermoswitch on the radiator works (more important when
> idling than when driving)
> - Make sure the temperature sender is okay (a bad guage will lead you astray)
>
> Not sure if I forgot any...
>
> Personally, I'm about to recore the radiator. I've done about everything
>else.
>
> - Tab
>
> At 08:24 AM 7/28/00 -0500, Mark Purtell wrote:
> >Thanks for the help already, but I'm still a bit puzzled by the MGB's
> >cooling system. I flushed the system, and refilled the block and radiator
> >with coolant. Then I drove the car (to open up the thermostat) and added
> >more coolant (I did this twice). Now when I drive the car, the
> >temperature needle moves up to the middle of the gauge temperature at a
> >"normal" rate, and then once it reaches about halfway, it stays there for
> >a minute or two and then it shoots up to the overheat area-it doesn't
> >always reach "overheat", but it gets close and will occasionaly peg the
> >end of the gauge. Once the needle says "overheat", as I drive faster, the
> >temperature gauge moves down from overheat, but never remains in the
> >middle of the gauge. The engine doesn't seem really hot, and my Hayden
> >fan is running fine. I have already replaced the temp sensor and have 180
> >degree thermostat in it.
> >
> >Thanks in advance-
> >Mark
> >
> >
> >
> >
>
>
--
Geoffrey Gallaway || Violence is only for those who have run out of good
geoffeg@sloth.org || ideas.
D e v o r z h u n || -- Doug
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