They use the A series Datsun heads on those engines when needed. I was
reminded of that yesterday at my MGB club meeting. I think the datsun head
also flows better.
Mike
----- Original Message -----
From: "Brian Hollands" <bholland@hayes.ds.adp.com>
To: "Marc Sayer" <marcsayer@home.com>; "Datsun Roadster Mailing list"
<datsun-roadsters@autox.team.net>
Sent: Saturday, June 09, 2001 7:28 PM
Subject: RE: No Thermostat
> It does depend on the car. The one example I know for sure is the BMC
> A-series in the Austin Healey Sprite. If you run that car without a
> thermostat your temp gauge will read lower but you wind up with flow
> problems at the back of the head. Basically the coolant flows in one side
> of the head and right out the water neck. Nothing circulates at the back
of
> the head and the result is that although the coolant temp at the front of
> the engine and in the radiator is fine, the #4 cylinder is overheating.
In
> the extreme, it can fry the #4 cyl. The t-stat provides enough
restriction
> to create more circulation of coolant in the head.
>
> Brian
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