Well, It is still running hot at idle.
I removed the air baffles which push air to the radiator (BT7 MK2) and
modified them so that they extended past the sides of the radiator and fit
tight. Also added tabs at their top so that the baffles go all the way up to
the bottom of the radiator top tank.
Took the car for a short drive on local streets. It ran on the thermostat
setting. Came home and let it idle in my shop (hood closed) where the temp
was 70F. It took 3 minutes to go from 165F to 190F. At this point I give
up!! Everything on this car is to spec.
John Snyder
----- Original Message -----
From: "M Lempert" <mlempert@bellsouth.net>
To: "Healey List" <healeys@autox.team.net>
Sent: Friday, July 02, 2004 6:35 PM
Subject: Re: Hot Problem
> I've been reading this thread with interest since it's a problem that I've
> been wrestling with for some time with my BN2. However, it appears not
all
> symptoms are the same, so while we're all having heat problems (cooling
> problems) I'm inclined to believe that we might be experiencing them for
> different reasons.
>
> Some cars are having problems while moving while others only when stopped.
> I had a BT7 that ran too hot only when the air temperature was extreme.
My
> Bugeye (granted, a different class) never has a problem regardless. My
BN2
> only has a problem while standing. In May I drove it to and from Tampa, a
> 10 hour drive each way, in extreme heat. The temperature had to have been
> in the 90's. Fortunately I encountered no traffic problems - very
> fortunately. My temp gauge stayed constant (while moving) at 170.
>
> When I stop the temp immediately starts to rise and will go well over 200,
> to a point where it experiences vapor lock. The moment I start to move
> again the temp responds downward rather quickly. I think I may be onto
> something, but first some more data. I had asked my mechanic during one
> visit to check out my cooling system. He reported everything was fine and
> the car never exceeds 190 degrees even after sitting at idle for some
time.
> I was puzzled yet happy to hear it. When I arrived to pick the car up I
> noticed he had the bonnet raised. I hated to ask, but yes, he had it up
> during his test. Duh ! What I thought I learned was that the rising heat
> in the engine compartment overcame the cooling system's ability. I was
> thinking of ways to exhaust the engine compartment.
>
> While at the Southeastern meet in Tampa I listened to a few people talking
> about the same problem. A few people there had added shrouds at the sides
> of their radiators. The rational was that while sitting, the fan must
suck
> air through the radiator, and the fan will pull air from points of least
> resistance. Without the shrouds air will be pulled from the sides; with
the
> shrouds preventing that, the suction is greater in front of the fan
> resulting in more air being pulled through the radiator. Makes sense,
> doesn't it ?
>
> I noted that my car doesn't even have the top shroud, so air must be
pulled
> from all over, minimizing air flow through the radiator.
>
> Now on another note, I read this on the E-Type list. I'm copying
everything
> so the author can get credit (or criticism) as merited. Attached below...
>
> Mike L.
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