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Block engine problem Brisbane - WORN OUT

Evenly worn out bores are a normal condition after considerable use. Abnormal excessive wear can occur for the same reasons as stated in PISTON - Worn Out. See PISTON - WORN OUT One worn bore, especially if it is close to the water pump or the returned water from the radiator indicates that the engine is running without a thermostat. This abnormally worn bore will be running too cold. As most wear occurs during cold start up and before normal operating temperature is reached. The removal of a thermostat will accelerate bore wear in the coldest cylinder.(or a stuck wide open or modified thermostat.) Thermostats can fail either stuck closed or stuck fully open. Unfortunately the stuck fully open position quite often goes unnoticed by the driver as the engine damage may not be as sudden, but long term it is terminal. Ring spin causes severe localised wear at the top or bottom of the bore. It is usually more pronounced at the bottom where less pressure is forced on the rings. Ring spin is usually a result of Unidirectional Honing. This hone pattern moves the ring around the piston during its travel up and down the bore. When the piston ring reaches bottom dead centre little or no pressure is applied to the ring so it can keep turning or spinning while the piston stops to change direction. This problem will cause pre-mature wear and is very easily recognisable upon strip down. Disclaimer Agreement : Every care has been taken in writing this information and procedures, but no responsibility can be excepted for errors, omissions or misuse of this information and procedures. The information available on this site is for your instruction only and cannot be copied for sale, © copyright 2001 UMR Engines
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Block engine problem Brisbane - WORN

OUT

Evenly worn out bores are a normal condition after considerable use. Abnormal excessive wear can occur for the same reasons as stated in PISTON - Worn Out. See PISTON - WORN OUT One worn bore, especially if it is close to the water pump or the returned water from the radiator indicates that the engine is running without a thermostat. This abnormally worn bore will be running too cold. As most wear occurs during cold start up and before normal operating temperature is reached. The removal of a thermostat will accelerate bore wear in the coldest cylinder.(or a stuck wide open or modified thermostat.) Thermostats can fail either stuck closed or stuck fully open. Unfortunately the stuck fully open position quite often goes unnoticed by the driver as the engine damage may not be as sudden, but long term it is terminal. Ring spin causes severe localised wear at the top or bottom of the bore. It is usually more pronounced at the bottom where less pressure is forced on the rings. Ring spin is usually a result of Unidirectional Honing. This hone pattern moves the ring around the piston during its travel up and down the bore. When the piston ring reaches bottom dead centre little or no pressure is applied to the ring so it can keep turning or spinning while the piston stops to change direction. This problem will cause pre-mature wear and is very easily recognisable upon strip down. Disclaimer Agreement : Every care has been taken in writing this information and procedures, but no responsibility can be excepted for errors, omissions or misuse of this information and procedures. The information available on this site is for your instruction only and cannot be copied for sale, © copyright 2001 UMR Engines
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