Datatek
Well-Known Member
Since when have alloy cylinder heads rusted?
Must be a new type of ferrous aluminium developed specially for BMW. Unless it the steel sleeve insert that has rusted.
Datatek
Well-Known Member
Must be a new type of ferrous aluminium developed specially for BMW. Unless it the steel sleeve insert that has rusted.
Sleeve insert looks like alloy to me.
Zinc plated steel i think Keith.
Datatek
Well-Known Member
I'll check tomorrow, but that would be a recipe for some serious electrolytic corrosion. Oh of course, it's BMW
O Bife
Active Member
Hence the title I gave this topic....
Hopefully off out to pick her up in about an hour. Looking forward to see what the "mechanic" has to say, should be a laugh. Will let you all know if I manage to get her home without too much hassle.
Datatek
Well-Known Member
Unless they have invented a non magnetic steel, both mine are alloy with a wall thickness of about 3mm.
Don't know Keith the small rear one on mine has a fair wall thickness but don't think the large front one has. Can't remember to be honest and i am not about to pull the top hose to find out. Have you never heard of stainless steel?
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They have - any of the austenitic stainless steels (rather than ferritic) are non magnetic.
However, I doubt that LR would have used stainless for stub tubes.
A
Grit Valve
2000 4.6 Vouge
Was talking more the steel insert , but just because its alloy doesn't mean crud doesn't build up and narrow the waterways know all
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Datatek
Well-Known Member
No hoses on my scrapper to easy to check. Yep stainless is non magnetic but sure as hell it's not stainless. Stainless is hard, the stub is not only non magnetic, but it's soft and as I said has a wall thickness of about 3mm.Don't know Keith the small rear one on mine has a fair wall thickness but don't think the large front one has. Can't remember to be honest and i am not about to pull the top hose to find out. Have you never heard of stainless steel?
Datatek
Well-Known Member
If there is rust, it's from the block and as I said, due to old or non existant antifreezeWas talking more the steel insert , but just because its alloy doesn't mean crud doesn't build up and narrow the waterways know all
