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Cooling system questioin
TOO BADD - 9/8/08 at 06:07 PM

Would you need an overflow pipe from the header tank in a sealed system using a standard type rad cap on the tank ?
Thanks for any replies

indykid - 9/8/08 at 06:16 PM

no

tom

TOO BADD - 9/8/08 at 06:31 PM

Thanks, will learn to spell next time !

britishtrident - 9/8/08 at 06:43 PM

You don't need it but generally speaking a good idea saves potential mess in the engine bay + stops the electronics getting sprayed if the engine boils.

02GF74 - 9/8/08 at 07:27 PM

quote:
Originally posted by britishtrident
You don't need it but generally speaking a good idea saves potential mess in the engine bay + stops the electronics getting sprayed if the engine boils.


hmmm, maybe i am misunderstanding the question of the response but if you do that, then it will no longer be a sealed system,

the expasnion tank souod be about 1/2 full when cold and large enough to hold the water when it expands when hot.

TOO BADD - 9/8/08 at 07:38 PM

Interesting replies.......
the reason for the question is .. I have a low water sender in the tank but if I fill to half level it seems to spit a little out to the level sender and keeps flashing my warning light. never empties out but just keeps to this level.
A bit annoying to get a bright red light flashing at you. Thought of blocking the overflow to overcome

adithorp - 9/8/08 at 08:05 PM

Sounds to me like the presure cap is knackered. Level should only increase slightly when hot. If the level is coming up enough for to push water out then the cap is duff. It should only release presure when when there's a problem.

adrian

TOO BADD - 9/8/08 at 08:06 PM

brand new cap !

indykid - 9/8/08 at 09:07 PM

hmmm, just reread the OP and i notice you say it has a standard type rad cap.

i assumed with you saying it was a sealed system that it'd have a plastic header tank screw cap and thus no provision for an overflow connection.

can we have a picture of your system just to confirm the specifics? if it is a sealed system, the small top pipe will be a breather to let air escape from the engine into the tank, not an overflow.

tom

britishtrident - 10/8/08 at 02:55 PM

quote:
Originally posted by 02GF74
quote:
Originally posted by britishtrident
You don't need it but generally speaking a good idea saves potential mess in the engine bay + stops the electronics getting sprayed if the engine boils.


hmmm, maybe i am misunderstanding the question of the response but if you do that, then it will no longer be a sealed system,

the expasnion tank souod be about 1/2 full when cold and large enough to hold the water when it expands when hot.


If the engine boils no amount of airspace would be enough --- I can't remember the exact figure but as steam water has about 2000 times the volume it has as liquid water.