healeys
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Re: Hot Problem

To: John Snyder <helyjohn@cablespeed.com>
Subject: Re: Hot Problem
From: Bob Tarwater <btarh2o@earthlink.net>
Date: Thu, 01 Jul 2004 22:52:56 -0500
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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