These fail frequently and are easy to check.
Paul
In a message dated 6/15/2004 11:26:15 PM Eastern Daylight Time, dickb@xxxxxxxxx
writes:
>
>
> Check your fan clutch, Mike, before you go off on a wild goose chase. High
> speed driving will cause the engine to heat up. I know this is
> counter-intuitive, but I've seen it enough times to believe it. Apparently
> the aerodynamics are such that too much air gets around instead of through
> the radiator if the fan isn't doing it's job. Of course there is a lot more
> heat rejection at high speeds also (that extra gas goes partly into heat).
>
> Another cause of high speed overheating is the lack of an anti-collapse
> spring in the lower radiator hose. The average gas station mechanic
> doesn't know much about physics, and discards that spring when replacing the
> lower hose. It is important - the water pump inlet side can actually go way
> below atmospheric at high RPM.
>
> So squeeze your hose to see if you can feel its ribs. If you can't - you've
> found your problem.
>
> Dick Benjamin
> ----- Original Message -----
> From: "Mike Pittinaro" <mechimike@xxxxxxxxx>
> To: <mailing-list@xxxxxxxxxxxxxxxx>
> Sent: Tuesday, June 15, 2004 12:57 PM
> Subject: Re: IML: '68 running warm <--my '67, too!
>
>
> > > 68) - I temporarily bent up some coathangers from
> > > the motel closet to force
> > > the blades to turn with the pulley all the time.
> > > Noisy as hell, but it sure cooled the engine down!
> > >
> > > Dick Benjamin
> >
> > Dick Benjamin, or MacGeyver...you be the judge!
> >
> > On a serious note, I've noticed my own '67 running a
> > bit on the warm side now that the daytime temps in our
> > nation's capital have broken the 90 degree mark. At
> > idle, its fine, however the faster I go, the warmer
> > the needle registers. This seems counter-intuitive,
> > since there would be more air rushing past the
> > radiator at, say, 90 than at a stoplight (Not that I
> > EVER drive 90...no, not me.) At idle, the gauge will
> > return to and sit at the mark indicating the bottom of
> > the "operating range" on the gauge, but above 55 or so
> > it will begin climbing. It stays within the
> > "operating range" but gets into the top 1/3 of it,
> > which I consider a bit too warm. My old '67 would
> > stay in the same place regardless of driving
> > conditions.
> >
> > My own thoughts tend towards something wrong with the
> > engine itself, ie timing wrong, plugs, mixture, etc,
> > rather than a defect in the cooling system. Am I on
> > the right track here?
> >
> > =====
> > --Mike Pittinaro
> >
> > One point eight litres
> > Stromberg carburators sing
> > Loose nut at the wheel
> >
> >
> >
> > __________________________________
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> >
> >
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