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| radiator https://www.ausmini.com/forums/viewtopic.php?f=2&t=37063 |
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| Author: | mooman10_0 [ Wed Oct 24, 2007 5:41 pm ] |
| Post subject: | radiator |
Has anyone run one of these before (is a 1275) motor. http://cgi.ebay.com.au/Mini-Cooper-S-Al ... dZViewItem Went for roadworthy today and passed, but he did say it needs a new radiator and while I m at it I know it either has a bad head gasket or a small crack somewhere wo will get that fixed while I m at it! Looks like she wont make minis at the mill 
Let me know about the radiator |
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| Author: | sgc [ Wed Oct 24, 2007 5:47 pm ] |
| Post subject: | |
Quote: Warranty does not cover electrolyses
Beware.. aluminium is the first metal to suffer in a mixed-metal engine. Same goes for the alloy water pump housings, they corrode fairly quickly in a Mini engine. |
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| Author: | Mick [ Wed Oct 24, 2007 5:53 pm ] |
| Post subject: | |
You can get it recored for less, or even just a reverse flush for less than a 80 depending on the damage to the radiator. Nothing wrong with copper as a heat conductor, slightly better than aluminium I believe. Aluminium is cheaper than copper too by the kilo... |
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| Author: | buztoy [ Wed Oct 24, 2007 7:00 pm ] |
| Post subject: | |
so why do poeple go for alloy, all the new cars have alloy these days for some reason |
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| Author: | Morris 1100 [ Wed Oct 24, 2007 7:03 pm ] |
| Post subject: | |
buztoy wrote: so why do poeple go for alloy, all the new cars have alloy these days for some reason Mick wrote: Nothing wrong with copper as a heat conductor, slightly better than aluminium I believe. Aluminium is cheaper than copper too by the kilo...
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| Author: | buztoy [ Wed Oct 24, 2007 7:16 pm ] |
| Post subject: | |
alloy vs copper would be like a buck or 2 difference, i think there is more to it than price of the mineral that it is made out of, |
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| Author: | sgc [ Wed Oct 24, 2007 7:17 pm ] |
| Post subject: | |
buztoy wrote: so why do poeple go for alloy, all the new cars have alloy these days for some reason
Alloys are fine, as long as they're similar throughout the water jacket. It's when you get cast iron, steels, aluminium, copper, etc. all in the same fluid that you get electrolysis. The weakest metal becomes sacrificial, and corrodes. In the Mini, you've got cast iron (block and head), copper (radiator), aluminium alloy (water pump). It's the water pump which is the first to go. More modern engines which use alloy blocks and heads don't suffer this problem with alloy radiators, because the materials are all similar. |
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| Author: | buztoy [ Wed Oct 24, 2007 7:39 pm ] |
| Post subject: | |
so did they ever make a cast iron water pump, |
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| Author: | KLAS [ Wed Oct 24, 2007 8:13 pm ] |
| Post subject: | |
sgc wrote: Alloys are fine, as long as they're similar throughout the water jacket. It's when you get cast iron, steels, aluminium, copper, etc. all in the same fluid that you get electrolysis. The weakest metal becomes sacrificial, and corrodes.
In the Mini, you've got cast iron (block and head), copper (radiator), aluminium alloy (water pump). It's the water pump which is the first to go. More modern engines which use alloy blocks and heads don't suffer this problem with alloy radiators, because the materials are all similar. thats true, but over here there are still a lot of mixed materials engines, iron block with alloy head are very common. and the alloy won't suffer 'cause the cooling fluid is made for this, just don't use plain water |
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| Author: | drmini in aust [ Wed Oct 24, 2007 8:19 pm ] |
| Post subject: | |
buztoy wrote: so did they ever make a cast iron water pump,
Yes they did, every Austalian Mini had one originally. `Detroit Wonder Metal'. 
The alloy ones are all aftermarket. They are cheaper then the repair kits for the cast iron ones eventually were. Easier to fit a new one than repair the old. |
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| Author: | slinkey inc [ Thu Oct 25, 2007 5:08 pm ] |
| Post subject: | |
"Just don't use plain water" That's interesting, because it's hard to define plain water, being from different countries and all. Tap water, and rain water would be different. But distilled water should be fine, as it does not conduct electricity well at all. So the electrons should not leave the aluminium. Electrons leaving the aluminium (or any metal) is a process called 'oxidation'. And the Aluminium ions (which are now ions, not aluminium metal) would flow through the electrolyte, leaving a radiator with less and less metal until it leaks, falls appart etc. But this wouldn't happen as distilled water is a poor conductor of electricity, hence isn't an electrolyte? How is coolant for conducting? Also in an electrolytic cell you usually use a solution containing the ions you want to oxidise or reduce as the electrolyte. 
This is equally a questions as it is a statement. |
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| Author: | Mick [ Thu Oct 25, 2007 7:12 pm ] |
| Post subject: | |
24 Oct Official Prices Cash Copper $77.36 Aluminium $24.75 It sure is about the dollar. It's not about thermal conductivity, and it sure isn't about weight although that will be the positive spin they might try to tell you. |
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| Author: | Morris 1100 [ Thu Oct 25, 2007 7:44 pm ] |
| Post subject: | |
Mick wrote: 24 Oct Official Yep, it is all about the dollar.
Prices Cash Copper $77.36 Aluminium $24.75 It sure is about the dollar. It's not about thermal conductivity, and it sure isn't about weight although that will be the positive spin they might try to tell you. Not only do you have copper core but there is also the brass tanks and then you need solder (lead/zinc) to stick it together. Plastic and Aluminum is much much cheaper. 
Because aluminum is less effective for cooling you need a bigger radiator, once you make the radiator bigger you also need more water. So the damn thing ends up heavier anyway. |
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| Author: | sgc [ Thu Oct 25, 2007 8:03 pm ] |
| Post subject: | |
Mick wrote: 24 Oct Official
Prices Cash Copper $77.36 Aluminium $24.75 Yeah, that accounts for people stealing live overhead train power lines in Melbourne, and circa 300km of trackside wiring in country Victoria. Copper is valuable. Thank the Chinese for that. |
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| Author: | KLAS [ Thu Oct 25, 2007 8:18 pm ] |
| Post subject: | |
slinkey inc wrote: "Just don't use plain water" That's interesting, because it's hard to define plain water, being from different countries and all. Tap water, and rain water would be different. yes, thats true. if i say "plain water" i mean the tap water over here (has to be of much better quality than most bottled drinking waters over here) Quote: But distilled water should be fine, as it does not conduct electricity well at all. So the electrons should not leave the aluminium. Electrons leaving the aluminium (or any metal) is a process called 'oxidation'. And the Aluminium ions (which are now ions, not aluminium metal) would flow through the electrolyte, leaving a radiator with less and less metal until it leaks, falls appart etc. But this wouldn't happen as distilled water is a poor conductor of electricity, hence isn't an electrolyte? How is coolant for conducting? Also in an electrolytic cell you usually use a solution containing the ions you want to oxidise or reduce as the electrolyte.
This is equally a questions as it is a statement. i am not sure about distilled water without coolant, i know it will corrode less than with non-distilled water, but it still does (tested with a summer-only car). only distilled water with some coolant kept the system clean (and lubed the waterpump), but don't ask me why |
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