1994 BMW 740I Engine cooling Problems

“Since 1999 my 1994 740I with 41,367 miles has interim car shakes on the street and at freeway speeds. For two years the dealer told me it was nothing and we should replace the mounts. Now in 2004 the engine shakes real bad, lacks power, and a lot of grey smoke is coming out of the exhaust system. We've gone back to the dealer and after charging us $350 for a cylinder leak test we have confirmation that all 8 cylinders have between a 38%-60% leak. Bmw now states that at 73,114 we need to replace the engine at a cost of $14,732.”

“I have listed a number of complaints that are equal to the type of problem that I am having. Tell if this true and what can I do. I have a 1994 Bmw 740I with 89,000 miles. 1) 740I m60 slight shaking vibrating at idle hello, my 740I model 1994 95,000 miles (built spet. 1993) is shaking a little at idle. I heard about the nikasil issue, Bmw shop says that's not the reason. The air pressure has been tested for leakage (at oil fill in) and with 2.5 (of whatever) it is okay, says the mechanic. 3.5 and above would be bad, he says. …”

“1994 740I Bmw leak down problem that destroyed the engine**cc the leak down flaw caused the engine to develop worn linings and exhibit a rough idle. The consumer stated the manufacturer used nikasil, an aluminum, nickel and silicon alloy to line the cylinders of the m60 engine. The cross hatched nikasil linings reacted with high sulfur content found in lower-quality gasoline. The reaction caused damage to the very top of the cylinder bore, where there is most contact of the burning mixture and the cylinder lining. …”