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The BMW Range
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e38 730il v8
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<blockquote data-quote="Ecc0" data-source="post: 584108" data-attributes="member: 20086"><p><em><strong>The Nikasil problem</strong></em></p><p>BMW used Nikasil, an Aluminium, Nickel, and Silicon alloy, to line the cylinders of the M60 engines. The cross-hatched Nikasil linings react with high sulfur content found in lower quality gasoline, such as those in parts of the United States. This reaction causes damage to the very top of the bore, where there is the most contact between the combusting fuel and the cylinder lining. The damage prevents a good seal from forming between the piston and the cylinder wall, causing a loss of compression in the combustion chamber. This "leak down" will cause M60's with worn linings will exhibit a rough idle and, if the problem continues unchecked, the engine will not start.</p><p>The only permanent fix for this problem is the replacement of the short block with the equivalent block using Alusil linings, which do not exibit this corrosion problem. After the problem was found, BMW issued an extended 6 year, 100,000 mile (160,000 km) warranty to cover these engines at no cost to the owner.</p><p>The composition of the engine can be found by checking the serial number stamped into the engine block:</p><p>M60B30:</p><p>· 1 725 970 - Nikasil</p><p>· 1 741 212 - Nikasil</p><p>· 1 745 871 - Alusil</p><p>M60B40:</p><p>· 1 725 963 - Nikasil</p><p>· 1 742 998 - Nikasil</p><p>· 1 745 872 - Alusil</p></blockquote><p></p>
[QUOTE="Ecc0, post: 584108, member: 20086"] [I][B]The Nikasil problem[/B][/I] BMW used Nikasil, an Aluminium, Nickel, and Silicon alloy, to line the cylinders of the M60 engines. The cross-hatched Nikasil linings react with high sulfur content found in lower quality gasoline, such as those in parts of the United States. This reaction causes damage to the very top of the bore, where there is the most contact between the combusting fuel and the cylinder lining. The damage prevents a good seal from forming between the piston and the cylinder wall, causing a loss of compression in the combustion chamber. This "leak down" will cause M60's with worn linings will exhibit a rough idle and, if the problem continues unchecked, the engine will not start. The only permanent fix for this problem is the replacement of the short block with the equivalent block using Alusil linings, which do not exibit this corrosion problem. After the problem was found, BMW issued an extended 6 year, 100,000 mile (160,000 km) warranty to cover these engines at no cost to the owner. The composition of the engine can be found by checking the serial number stamped into the engine block: M60B30: · 1 725 970 - Nikasil · 1 741 212 - Nikasil · 1 745 871 - Alusil M60B40: · 1 725 963 - Nikasil · 1 742 998 - Nikasil · 1 745 872 - Alusil [/QUOTE]
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