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post #1 of 5 (permalink) Old Apr 21st, 2010, 4:51 pm Thread Starter
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coolant question

Okay, the manual specifies a coolant that's 'nitrite-free'.

Is there some material incompatability involved here, or is this an EU ecological thing?

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Joe

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post #2 of 5 (permalink) Old Apr 22nd, 2010, 3:35 am
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Quote:
Originally Posted by sloowpoke
Okay, the manual specifies a coolant that's 'nitrite-free'.

Is there some material incompatability involved here, or is this an EU ecological thing?

regards,
Joe
When engines started using aluminium many years ago there was sudden realisation that nitrites in coolant mixes increased internal corrosion. Now virtually all modern engines use aluminium most reputable coolants contain corrosion inhibitors and are nitrite free. If the coolant mix says it's suitable for aluminium engines then you should be good to go. I use a 50% mix and only buy the concentrated Ethylene Glycol products. Recently I got a de-ionising setup for washing windows, so I now mix with de-ionised water - but it's not essential. I steer clear of products that are either Methyl alcohol based or are pre-mixed (expensive and cost more eco to ship).



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post #3 of 5 (permalink) Old Apr 22nd, 2010, 8:44 am Thread Starter
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So, the only difference for the recommended BMW product is the labeling? Nobody in the U.S. bothers to label their aluminum compatable anti-freeze as nitrite-free even though they all are?

Marketeers... They should all be hung.

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post #4 of 5 (permalink) Old Apr 22nd, 2010, 9:00 am
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Well BMW 'brand loyal' riders will always tell you to buy the expensive BMW coolant. Personally I'm totally brand agnostic when it comes to service consumables. Filters are about the only BMW service items which I usually buy mail order.

Actually, all Glycol based coolants are pretty agressive, but only when exposed to air. The last time I had my water pump off I noticed corrosion where the bottom hose hadn't been sealing well. Fortunately I was able to clean up and restore the ring profile with Epoxy, adding a thin coat to the ali for good measure and I've not seen any more leaks. When you poke your fingers into a radiator core and it crumbles away, often that's because the cooling system puked and the core wasn't washed down afterwards.



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Last edited by voxmagna; Apr 22nd, 2010 at 9:07 am.
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post #5 of 5 (permalink) Old Apr 22nd, 2010, 8:34 pm Thread Starter
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heh heh... Since no 'brand' has ever demonstrated any loyalty to me, I've never seen any reason to be loyal to them.

regards,
Joe

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