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| Coolant Leak https://www.ausmini.com/forums/viewtopic.php?f=2&t=21692 |
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| Author: | Razor [ Sun Aug 20, 2006 2:17 pm ] |
| Post subject: | Coolant Leak |
Hi When I turn the motor off coolant leaks from the overflow tank coming out from the end of the hose but hose seems ok no cracks and tight maybe wrong type of caps heres some photos 
if they are correct which cap is for the overflow tank and radiator? |
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| Author: | drmini in aust [ Sun Aug 20, 2006 4:29 pm ] |
| Post subject: | |
Neither is correct for the radiator if you have a Moke or Morris 1100 type pressurised overflow tank- they have a flat cap on the rad and a pressure cap on the overflow tank. But... if you had a plastic coolant recovery bottle (like many modern cars do now) the cap on the left would be the right sort for the radiator, as it has a rubber outer seal to hold vacuum. But the one on the bottle would be just a vented cap, no pressure spring. |
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| Author: | Razor [ Sun Aug 20, 2006 6:28 pm ] |
| Post subject: | |
My overflow tank is steel not plastic it looks like this but mounted at the front 
but my radiator neck doesnt have the tube sticking out like this pic 
the tube is sitting inside not sticking out. Where can I get a pressurised cap for the overflow tank and radiator cap? anyone knows the part number? thanks |
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| Author: | DTrain [ Sun Aug 20, 2006 8:34 pm ] |
| Post subject: | |
omg that is nasty! |
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| Author: | Razor [ Sun Aug 20, 2006 8:38 pm ] |
| Post subject: | |
what do you mean? the previous photos are not mine I just posted photos I found in this forum. |
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| Author: | Razor [ Mon Aug 21, 2006 7:32 pm ] |
| Post subject: | |
here's a pic of my radiator neck its a bit dirty, I will flush the cooling system ASAP note the tube is not sticking out like the previous photo for flat cap 
So do I still need the flat cap? and does anyone know where I can get a new one? Cheers[/img] |
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| Author: | Morris 1100 [ Mon Aug 21, 2006 7:48 pm ] |
| Post subject: | |
If you are using an expansion tank you need the flat cap. You can get them from any place that sells mini parts. If you are using an overflow bottle you need to use a recovery cap. This is the one on the left in your first photo. Regarding the photo of the Morris 1100 radiator, the pipe sticks into the radiator neck so that idiots don't fit the wrong cap. 
So if you have a tank like the one in the photo use a flat cap on the radiator and a normal radiator cap on the tank. |
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| Author: | Razor [ Mon Aug 21, 2006 8:18 pm ] |
| Post subject: | |
Morris 1100 I'm confused My radiator doesnt have the tube sticking out as I stated on my previous post whats the difference between expansion tank and overflow tank? I got the same as the 3rd pic but mounted at the front |
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| Author: | Morris 1100 [ Mon Aug 21, 2006 8:32 pm ] |
| Post subject: | |
You don't need the tube to stick in to the radiator. An expansion tank had a radiator cap on it. An overflow tank is just a plastic bottle to stop coolant spilling on the road. When the motor warms up the coolant expands and is forced out of the radiator. With and overflow bottle the excess coolant sits in the bottle and when the motor cools down the coolant is sucked back into the radiator. |
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| Author: | Razor [ Mon Aug 21, 2006 8:39 pm ] |
| Post subject: | |
OK so I have a an expansion black steel tank and I've got the right cap for it (the on with two rubber seal) now I need a flat cap for my radiator right? thanks now its very clear |
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| Author: | drmini in aust [ Mon Aug 21, 2006 9:25 pm ] |
| Post subject: | |
Yes, U got it..
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| Author: | 68matic [ Mon Aug 21, 2006 10:31 pm ] |
| Post subject: | |
i got my blanking cap (flat cap that fits on rad) from mini padstow for about $10. you need abit of grease to get it on real tight. solved my coolant-surging-everywhere problem. |
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| Author: | Razor [ Sat Sep 23, 2006 11:19 pm ] |
| Post subject: | |
sorry to bring this old thread back I bought the proper flat radiator cap but i drove the mini today, the longest time since I got it and when I got back home coolant was coming out from the hose of the expansion tank it wasnt overheating maybe too much coolant? should the expansion tank be full or empty when motor is cold |
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| Author: | drmini in aust [ Sun Sep 24, 2006 6:34 am ] |
| Post subject: | |
Water expands when heated, so it will overflow the expansion tank if you fill it. Leave it an inch or more below the neck...
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| Author: | Razor [ Sun Sep 24, 2006 10:48 am ] |
| Post subject: | |
Cheers Doc will check and test it again. |
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