12 replies to this topic

[JTBob]

Hi,

I had gotten a 1992 SPi and was changing the radiator and hoses. The hose running off the top of the radiator for the expansion tank went to nowhere. After testing the new radiator on a good run, the cap let off a little fluid after a few minutes when the Mini was shut off.

Did all Minis, 1992 and newer, come with an expansion tank? I checked under the left front by the damper, but no tank. If they are supposed to have one, where does it mount? I couldn't find anything in the Haynes or workshop manuals I have.

Minispare.com listed one, but they show it currently unavailable. Any other sources for this part?

Thanks,
JT

[taffy1967]

Yes the tank should be mounted to the left of the damper mount. Well it was on my sister 92' Mini British Open Classic LE anyway.

[Sprocket]

I got one you can have, I cannot use it any more as the brace bars that i fitted are in the way.

Its yours for the cost of postage

[miniboo]

Sorry to hijack the thread a bit but have you had to change anything else sprocket? or is the overflow just like older minis now?

[topcat]

I have a small one on my 1991 carb cooper but I didnt on my 1995 Spi sidewalk if thats any use to you.

[Sprocket]

I have a small one on my 1991 carb cooper but I didnt on my 1995 Spi sidewalk if thats any use to you.

On the 1995, Im sure you did, it fits under the nearside wing, your 1991 will have had it in the engine bay next to the wiper motor. Mine is a 1995 Sprite SPi and it is (was) under the wing

Miniboo, nah, nothing else, just run the pipe as per older minis, i've never had a problem of overheating, yet and it has never blown down either so im confident i dont need it, we'll see if Mr MOT says anything, if he even notices

[miniboo]

yeah thats what i thought. bet they wouldnrt even notice. i wnder about the charcoal filter on mine aswell to be honest

[Sprocket]

That I did refit, at least im doing a little for the environment. Hydrocarbon emissions are BAD

[miniboo]

hmmmm true

[JTBob]

Once I get one, I need to figure out how it goes on. Hopefully it's pretty self-evident.

Thanks everyone for the info.

Cheers,
JT

[Dan]

Boo, (and Sprocket) you'll need to change the rad-cap. The one for the expansion tank system doesn't have a pressure valve in it. It's always open to the overflow so you won't have a pressurised system.

Sorry, it does have a pressure valve but it's also always open to overflow so you'll never get pressure unless a tank is fitted to the overflow.

Or something like that, you get what I mean.

Edited by Dan, 11 July 2006 - 10:49 PM.

[Sprocket]

Boo, (and Sprocket) you'll need to change the rad-cap. The one for the expansion tank system doesn't have a pressure valve in it. It's always open to the overflow so you won't have a pressurised system.

Sorry, it does have a pressure valve but it's also always open to overflow so you'll never get pressure unless a tank is fitted to the overflow.

Or something like that, you get what I mean.

The tank is open to atmosphere through a small vent so if the rad overflow was open to it, the system would never pressurise anyway.

You are right about the rad cap being different, but I believe the difference to be that as the system cools, if and when a vacuum is produced it alows the the sytem to suck what it had expelled, back in. Ordinary caps maintain the vacuum

[miniboo]

well i made up a new bracket yesterday and refitted the tank. might aswell have it if its there i guess.

here is a pic of mine. the nut is a 10mm one. and it sits ontop of the suspension bracket

http://www.theminifo...e=post&id=17713

Edited by miniboo, 12 July 2006 - 08:08 AM.