Date: Tue, 15 Dec 1998 11:35:00 -0800 From: Justin VanAbrahams <jvanabranopsamnet> Subject: Re: Best method for morning warmup
Roy Björkstrand wrote: > > I have always wondered what happens inside the engine if it is heated up fast. > How high are the thermal stresses (block is cold from the outside and hot > from the inside) compared to the slow heating? Does the pistons, if it is for > example aluminium, expand faster than the block? Due to these questions I´m a > "slowheater". (One could also ask what is the REAL difference between "slow" > and "fast" heating). You are dead on. One of the major "problems" with many modern engines is the use of a light alloy head (like aluminum) on an iron block, or using light pistons in an iron block. They do expand at different rates when heat is applied which can cause all sorts of problems. -Justin
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