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Cold 'No Start' Theory 700

Once again this morning the 88 760 Turbo did not want to start. Temperature about 20 degrees and the engine caught once then acted like it flooded. I turned it continually until it caught and finally fired on all four cylinders. There was not the first smoke to indicate a flooded condition though. I am thinking now that this is a combination of problems: worn cylinders, poor spark even under good circumstances, and the fact that with an expansion contraction coefficient about 12 times that of the steel cylinder, the already low compression (8.7:1) is further reduced by a piston that has shrunk several thousands of an inch more than the cylinder wall in the cold, multiplying the wear.(Which would explain why the Non-Turbo B230F motors with 9.8:1 Compression start in cold weather) I am going to do several things to try an help the problem short of putting a block heater in the lower radiator hose. First, I am putting in plugs that are two ranges hotter than the factory ones. That is a good bet for an older motor anyway. An Accel coil with a hot spark is definitely going in, and, if that doesn't work, my wife has given me permission to build one of my chevy motors for it. I'm thinking of a 4.3liter six mated up to the AW71. Anybody tried it?






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New Cold 'No Start' Theory [700]
posted by  Big Harry  on Tue Jan 25 14:33 CST 2005 >


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