Conrod engine problem Brisbane - BENT

Bent con-rods can occur as a result of coolant entering the combustion chamber as the result of a crack or blown head gasket. If the engine is wound over on the starter after coolant has entered the combustion chamber it is probable that the hydraulic action of the piston trying to compress the coolant will bend the con rod. Vehicles driven through deep water may ingest water into the engine via the air cleaner and will bend the con rods. In most cases the rod will need to be replaced but with a very slight bend the rectification can be done on a rod straightening jig. Foreign objects, broken valves or valve inserts getting lodged between the piston crown and cylinder head will obviously bend con rods. Engines that are over loaded and over revved may develop slightly bent con rods. This is very evident on a rebuild as the big end bearings will have a distinct diagonal wear pattern. The upper bearing shell will show wear on one side and the lower bearing shell on the opposite side. These slight bends can be rectified in a straightening jig but with any severe bend the rod should be replaced. If a rod is straightened it is a good practice to replace the rod bolts as the rod must have been over stressed at some point. 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
Performance Engines
Bent Conrod due to hydraulic action
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Conrod engine problem Brisbane -

BENT

Bent con-rods can occur as a result of coolant entering the combustion chamber as the result of a crack or blown head gasket. If the engine is wound over on the starter after coolant has entered the combustion chamber it is probable that the hydraulic action of the piston trying to compress the coolant will bend the con rod. Vehicles driven through deep water may ingest water into the engine via the air cleaner and will bend the con rods. In most cases the rod will need to be replaced but with a very slight bend the rectification can be done on a rod straightening jig. Foreign objects, broken valves or valve inserts getting lodged between the piston crown and cylinder head will obviously bend con rods. Engines that are over loaded and over revved may develop slightly bent con rods. This is very evident on a rebuild as the big end bearings will have a distinct diagonal wear pattern. The upper bearing shell will show wear on one side and the lower bearing shell on the opposite side. These slight bends can be rectified in a straightening jig but with any severe bend the rod should be replaced. If a rod is straightened it is a good practice to replace the rod bolts as the rod must have been over stressed at some point. 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
Performance Engines
Bent Conrod due to hydraulic action
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