John,
Are the fans on the two BT7's different from each other ?
Bob T
John Snyder wrote:
>Hello List,
>
>I have a problem w/ both of my recently restored tri-carb Healeys. One is a
>BN7 (2500 miles), and the other is a BT7 (1500 miles). Both overheat very
>quickly when idling in neutral. Both had a complete overhaul of the engines,
>both have new radiator cores (4 staggered rows of tubes, like the factory
>original). I also have an original, unrestored BT7 MK1 (head has never been
>off, radiator has never been rodded, has over 100,000 miles) that does not
>have this problem. Have owned this car for over 34 years.
>
>Currently working on the BT7. Timing is right on, checked the clearance
>between the water pump impeller and the housing, richened the fuel mixture.
>Took it for a drive on a deserted road at 30 mph, 4th gear, o'd, 3.54 axle,
>about 1200 rpm. Ran cool, right on the thermostat. Stopped, put in neutral,
>but kept the engine at 1200 rpm. Started to overheat immediately. Started
>driving w/ same settings, and trmperature stabilized, and then started to cool
>down. Clearly the problem is air flow. The car has a standard fan, and I
>really don't want to go to a Texas Cooler as I would like to keep the engine
>original looking.
>
>Question: Has anyone tried changing the pitch of the fan blades? I am temped
>to try this, but it could be a really big mistake. Won't try it unless
>someone out there has had success and can tell me just how far to bend them.
>Maybe this is a Really Dumb Idea, but had to ask.
>
>TIA
>
>John Snyder
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