expansion cap

[heatherpetch]

Hi guys,can you confirm that the expansion tank top when you press the release button that it should pop back up on it's own i am not sure if we have a problem or not we keep losing a small amount of water no overheating probs,but when we topped up the tank today Garry noticed that the black button on the cap was pressed in,so should it be in or out we think in so i hope you techie peeps out there can clear up the confusion please cheers Heather

[trevd01]

Ours doesn't have a black button...

[daveblueozzie]

no black button on mine , just the same as Trev's

[heatherpetch]

ok then here is what we think if we press the black button it releases the pressure then if its sticking down the system is not pressurised so this might be the cause of the water dissapearing instead of the pressure building as it should i think its allowing water to escape,this only happens when the bongo has worked hard up hill etc,normal flat driving no loss there is defo no overheating going on all hoses are ok,cheers confused.com

[francophile1947]

I'd get a proper cap Heather - the one you've got doesn't sound standard at all - mine's the same as the others here.

[daveblueozzie]

i think you have the wrong pressure cap on the tank, it should look like the one in Trev's photo, YELLOW ON THE TANK AND RED ON THE RADIATOR.

[heatherpetch]

well it is yellow but with this black button which says press to release it also says 1.1 on it.Where would i get one from?and could it let water escape if it stays pressed in as this does release the pressure

[daveblueozzie]

well it is yellow but with this black button which says press to release it also says 1.1 on it.Where would i get one from?and could it let water escape if it stays pressed in as this does release the pressure

you should not be losing water from the cap, it sounds like you just press it to release the pressure before you take the cap off. you may have a small leak elsewhere.

[francophile1947]

you should not be losing water from the cap,

Might lose some if this button isn't sealing properly Dave.
I'd have thought that a cap should be available at your local car spare shop - surely they're not specific to a Bongo

[daveblueozzie]

you should not be losing water from the cap,

Might lose some if this button isn't sealing properly Dave.
I'd have thought that a cap should be available at your local car spare shop - surely they're not specific to a Bongo

you are right John if its not sealing properly, but it does not sound like any cap ive seen, and ive helped fit a lot of coolant alarms and never seen one like heather's description

[trevd01]

This is the one on the rad...

[francophile1947]

you should not be losing water from the cap,

Might lose some if this button isn't sealing properly Dave.
I'd have thought that a cap should be available at your local car spare shop - surely they're not specific to a Bongo

you are right John if its not sealing properly, but it does not sound like any cap ive seen, and ive helped fit a lot of coolant alarms and never seen one like heather's description

Right Dave - I've never seen or heard of one either It sounds dangerous if you should accidentally push the button when system is still hot and pressurised

[daveblueozzie]

Heather i would put a wanted post on the, er ,er stuff wanted section , for an expansion tank cap. you may be lucky someone may have a spare . then you will know if its that whats been leaking , with any luck thats all it is.

[dandywarhol]

You'll get a 1.1 bar cap in most motor factors for around a fiver. They fit most Jap cars/vans

[haydn callow]

pm me your address and I'll pop one in the post...Quick though as I'm off on holiday Sat.