[Healeys] Radiator filler neck

[Peter Schauss]

If the coolant overflows after you stop the engine on a hot day, that
is normal behavior
for our cars.  When the water pump stops circulating the coolant through the
radiator the water in the block gets hot and the pressure in the system gets
high enough to overcome your radiator cap.  The simple solution is not
to overfill
radiator.  Just keep the coolant level about an inch above the coils.
I find on my
car, that if do not add coolant to compensate for the overflow, it
evenually reaches a level
where it does not overflow.

HTH,
Peter Schauss
1963 BJ7
1980 MGB


On Tue, Oct 12, 2010 at 12:14 PM, Pieter and Linda <pieters at pt.lu> wrote:
> I haven't had any real problems with my car over heating in anything but
> extreme conditions but I do get a lot of coolant loss through the overflow
> pipe. I have tried a number of different brands of rad caps with no real
> difference. I recently bought a new alloy radiator and noticed that the
depth
> of the filler neck is much shallower. My original radiator is 26mm deep,
> measured from the top down to the sealing lip for the rubber cap seal. The
> alloy is only 19mm deep and you really have to push the cap down to get it
on.
> I suspect that the original may have had a different filler neck fitted at
> some stage.
>  Could somebody please measure their radiator for a comparison? The car is
a
> BJ7,
> thanks