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 > > > > > > > > __________________________________ > > Do you Yahoo!? > > Yahoo! Mail Address AutoComplete - You start. We finish. > > http://promotions.yahoo.com/new_mail > > > >