[Healeys] Fw: Vanishing Coolant

[rkeysor]

I'll give that a chance and see what happens.  I did not have any coolant loss
before installing what you term the expansion vessel.  As for suggestions that
the radiator cap may not have enough depth, I think it hss the prescribed
dimensions.  By the way, Moss terms the tube I discuss as a thermostat bypass
blanking sleeve.  I found that the thermostat housing would accept a regular
thermostat with the use of s slightly thicker gasket. It sets right on top of
the sleeve, which is held in place at its top by the relief cut in the
thermostat port. I read about this online somewhere.
----- Forwarded Message
-----
From: Oudesluys <coudesluijs at chello.nl>
To: healeys at autox.team.net
Sent: Tuesday, March 4, 2014 10:57 AM
Subject: Re: [Healeys] Vanishing Coolant
If one uses a expansion vessel, you have to fill up the radiator up to the
very brim. When the engine heats up air in the standard filled up radiator is
expelled trough the expansion vessel. When cooling down the coolant in the
vessel is sucked into the radiator and "disappears". However after a few times
the radiator and cooling system will have expelled all air and the radiator
will be full to the brim. From this moment on you will not "loose" any more
coolant.

If you find drops of coolant there is a leak somewhere which will
loose you coolant. Heater hose, head gasket, freeze plug???

Kees Oudesluijs
NL



rkeysor schreef op 4-3-2014 14:35:
> As I have dealt with the cooling
issue with my BN7, I'm having some
> interesting experiences.  Lately it's the
coolant in the reserve tank going
> away.  After purchase, I had the radiator
recored, which did nothing to reduce
> the tendency to run hot in warm
weather. We have an abundance of that here in
> Florida.   I next constructed
an aluminum surround for what I understand is a
> Texas cooler type of fan
installed by the PO.  I added a new 7 lb. radiator
> cap, and then the tubular
sleeve Moss sells to block the recirculation port in
> the head.  With these
in place, I drove the car more than 400 miles to a Brit
> car show near
Tampa.  The car generally ran below 190 degrees, though it got
> to 200 in
heavy traffic. No hint of boiling. Subsequently, I installed a 160
> degree
thermostat inside the Moss sleeve (the car didn't have a thermostat and
> the
locals tend not to use them) and also mounted a coolant reserve tank,
>
basically a ketchup bottle with the top
>   drilled to take the rubber
radiator overflow hose.  I fill the bottle about
> half way with coolant, with
the hose end reaching the bottom of the
> receptacle.  On two occasions since
doing this, I have found the reserve tank
> empty after fairly long drives,
with the radiator coolant level remaining
> normal and no overheating. The
engine never reached 190 degrees on that last
> longer run. On one briefer
run, upon stopping, I noted bubbling from the hose
> in the reserve tank, and
that continued for several minutes after stopping.
>   There is no suggestion
of coolant in the engine oil. The car runs perfectly.
>   I have on occasion
found a couple of drops of coolant on the floor toward the
> rear of the
engine.  I have suspected a Welsh plug leak, but I haven't been
> able to
locate it. Question, where is the reserve tank coolant going?
>
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-- Kees Oudesluijs
Dorpsstraat 183
2995XG
Heerjansdam
T: 078-677 1233
E: coudesluijs at chello.nl

Technische commissie
Jensen Healey en GT
Het Jensen Genootschap Holland
www.jensenholland.nl
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