ok i believe the correct term is call'd COLD SEIZE. Is it caused by you not letting your engine warm up, not having a exhaust pipe, not having a air filter. Heat will always transfer from HOT to COLD. Heat will never seek the “Hotter” path but, always the “Cooler” path. The piston/cylinder area is the heat source and will be the hottest whenever the engine is running. The cooling system will ALWAYS be cooler in temp. ALWAYS! This states that energy can be neither created nor destroyed. However, energy can change forms, and energy can flow from one place to another. The total energy of an isolated system remains the same. Now that is all out of the way…let’s relate this to a 2 stroke engine. One widely held belief is that a Cold Seize is the result of “mad” rushing cold air contacting the HOT, running, engine and the result is this cold coolant/ cold air is shrinking the cylinder walls in a manner such that the hotter piston will immediately fuse itself to the cylinder walls. This VERY unlikely!!
WHY?? Well.. see what we talked about above.
Example.... You are in Antarctica and you build a fire in the frozen tundra and snow. The outside temp is -30 F BELOW ZERO and the temperature of the fire is 1800 F. The fire is giving off heat energy and you and the surrounding air are absorbing it and getting “hotter”. NOW.. you decide to construct an igloo around the fire. You KNOW that the igloo is at least 32 F, if it were not it would not be frozen solid! What does cause an engine to cold seize
Glad you asked… A cold seizure is the result of the piston expanding too fast with respect to its cylinder. Your engine is constructed on many different types of materials all housed together and designed to work as one system. All internal engine components, when heated (running engine) will expand to some extent. This expansion is normal and unavoidable. Different components will expand at different rates and will expand to different extents. When you fire an engine after it has been able to completely cool down to a state where all internal components are at their “NEUTRAL” state.. meaning they are in no state of any expansion due to heat, these components will begin their expansion all over again. It is THIS expansion rate differences that will cause an engine to “Cold Seize”. So, you have an entire engine that is being heated and, as a result, ALL of its internal components are expanding at different rates. This INITIAL expansion is what you need to be mindful of to avoid a cold seize. Once these engine components have reached their full expansion, then the engine should be operating in its design spec and safe to run and run hard. If you choose to fire up a cold engine and immediately pour large amounts of heat into the components (i.e. high rpm) you RISK having these varying expansion rates collide and seize.symptoms after seize will be, cracked piston ring's, warped piston rings,warped pistons, damaged pistons,damaged connecting rod. Make sense?? OK It should be clear that it is VERY unlikely to have ANY coolant or cold air cause enough rapid cooling of a running engine to seize it… NEAR IMPOSSIBLE! Simply because the "magnitude" of the heat source is simply too great for the ,smaller, cooling source to over-come. It is like a spider vs. your foot! but can happen!!!!