7 replies to this topic

[Saxo-Fiesta-Mini]

I have a 1984 austin mini mayfair with a 1275 a series engine with a standrad 2 core rad

the problem is whenever i stop the car after ive been drivin hard the rad cap releases and all the water goes into my expansion bottle

also whenever i go the motorway doing 80 the car gets HOT and i can gaurenty when i stop and let it cool the rad need about a 500ml to a litre of water


ive fitted a new rad cap and this is better but still using water i did have a rad leak and put some rad seal in which did indeed stop the leak but im unsure if it the thermostat or rad thats at issue with the engine using water seems like it gets too hot and the rad caps just saying ive had enough

head gaskets fine, water pumps fine

so im not sure if one the rad isnt cooling enough or 2 the thermostat crap and not working properly or 3 im being a retard and this is how mini rads are unless u fit a 3 or 4 core rad and a racing cap

[lawnmowercrap]

Personally i'd stroll on down to Halfords and pick a stat up, theyre only about £4 so its not going to break the bank. I'd be tempted to pick another rad cap up as well, incase the over pressurising has caused it to fault.
If that fails, give your cooling system a clear out.
I had a cooling issue with my old 1098 and it turned out to be because of all the bar seal someone had put in.
Lee

[Asphalt]

A mate of mine had a similar problem when he fitted a 998 cooling system to a 1275 A+ w/o a water pump bypass

The rad should be sufficient for an un- or mildly tuned 1275.

Did you do a pressure loss test?

Other thing I can imagine:
- air in system (had this once)
- stuck thermostate
- wrong ignition timing / lean mixture
- headgasket

Edited by Asphalt, 13 April 2009 - 11:16 AM.

[Saxo-Fiesta-Mini]

pressure tested the rad, fine then a stone cause a leak, rad cap pressure released at 10lb so got a new one, stats not been touched so thats my new port of call, gonna be rebuilding the engine soon so gonna get new rad, wp, stat, rebore, cam kenlow the lol

i might just stop being a *woman of ill repute* and leave it alone lol

or i may indeed wip the stat out when im welding it at college this week

[il-barba]

if you fill it to the top there will always be a little amount going out of the overflow as the coolant expands.

[mini_mad69]

Have you flushed the system out? try a new stat in it may not be opening properly. they don't cost alot.

Also check your fan is on the right way around, lot's of minis have this.

[leepol83]

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Edited by leepol83, 16 April 2009 - 07:44 PM.

[Dan]

Are you using the right rad cap for an expansion bottle system?