[Healeys] Vanishing Coolant

[Oudesluys]

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