66 Sprite 1275 Marina engine, downflow rad, 74C thermostat,
high capacity water pump (GWP134), bypass hose installed,
heater installed, system filled with ready-made "parafluid"
(20% ethyleno-glycol), standard plastic fan and pulley,
electric non-shrouded fan in front of rad (unbranded) that
operates via an on/off toggle switch on the dashboard ,
dual gauge temp ether capillary tube directly on radiator.
It is not always very hot here, contrary to public belief.
It's actually cold now (10C) and the problem persists:
Engine overheats (above 90C) when at idle in traffic,
temp drops when I move, even going uphill, so, this type
of overheating is what I would like to cure, if possible.
I hate turning the electric fan on because although effective,
it makes a horrible whining noise that is unbearable.
Had the same problem with my Mini, took the rad to a good
rad shop and they installed a larger core (growth towards the
wing - there was space), problem solved.
However I think this cannot happen on the Sprite as the rad
is already a tight fit on every direction so a larger core
will necessitate banging and altering body parts or brackets,
am I right or wrong? What else can I do?
Frank Clarici wrote:
> I have been (and prefer) the old style down flow radiators. I run hot
> 1275s and never had an overheating problem except maybe 200 degrees
> while sitting in traffic when the ambient temp is 95+.
> I have had nothing but troubles with the cross flows (just changed one
> tonight in a 74 Midget) Almost put a down flow in it but I kept it
> I would just like to hear how many others have troubles with down flows.
> I only had one recored in 27 years, all the others are old stock picked
> out of parts cars and swap meets. And I just flush them out with a
> garden hose.
> Just curious
> Frank Clarici