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Q how to increase compression in an engine
AnnabelleRhys
RodHobson Release Time: July 2, 2024, 9:11 AM
To increase engine compression, you primarily focus on modifying the compression ratio, which is the difference between cylinder volumes when the piston is at the bottom versus the top of its stroke. Techniques include installing domed pistons, which reduce the combustion chamber volume, or using a thinner head gasket to decrease the space above the piston at top dead center. Milling the cylinder head to make the combustion chamber smaller is another method. For high-performance applications, adding a turbocharger or supercharger compresses air before it enters the combustion chamber, effectively increasing the mixture’s density and enhancing combustion force. These modifications require careful planning and tuning, as increasing compression can lead to engine knock if the fuel’s octane rating isn’t sufficiently high or if engine timing isn’t properly adjusted. Always ensure changes adhere to your vehicle’s manufacturing tolerances to prevent engine damage...
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Q how to tell if riding mower engine is locked up
IngridRichard
RodHobson Release Time: June 29, 2024, 8:36 PM
To determine if a riding mower engine is locked up, first try manually turning the crankshaft. Remove the spark plug for safety, then use a wrench on the crankshaft bolt to turn it. If it won’t budge, the engine might be seized. Common causes include overheating, lack of oil, or internal damage. Also, listen for unusual noises when trying to start it; a clicking sound without the engine turning over could indicate a locked engine. Before concluding, ensure it’s not a dead battery or a starter issue. If confirmed locked, it’s often more cost-effective to replace the engine or mower, depending on the age and condition of the equipment.
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Q how to fix a stripped bolt hole in engine block
Robvfc
RodHobson Release Time: June 29, 2024, 9:22 AM
Fixing a stripped bolt hole in an engine block involves a precision approach to restore thread integrity. One efficient method is using a Helicoil insert, a coiled wire insert that provides a new threaded area. Firstly, carefully drill out the original stripped hole to the specified size for the Helicoil. Next, tap the hole with the appropriate size tap to create new threads. Insert the Helicoil, which effectively becomes the new thread for the bolt to grip. Alternately, for larger bolts or critical areas, consider a Time-Sert, which is a solid bushing and often considered more robust than a Helicoil. Both methods require precision tools and adherence to manufacturer’s specifications to ensure the repaired thread can withstand engine pressures and temperatures. It’s crucial to ensure all metal shavings are cleaned from the repair area to prevent engine damage.
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