Editing Pistons and rings (section)
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==Ring end gap location== The idea behind staggering the ring end gaps in a certain way is to have the engine start up without any gaps being aligned. The rings tend to rotate on their own during the life of the engine, so starting them out as shown will prevent them from aligning, at least not right away. Hastings has instructions if there's a problem with installing their rings on some pistons, located [http://www.hastingsmfg.com/ServiceTips/oil_ring_installation_problems.htm '''here''']. While there are different thoughts on ring end gap placement, unless the manufacturer's instructions say otherwise, the following diagram will work fine: [[File:PISTON RING END GAP LOCATION.jpg]] ===Metric rings=== And if that wasn't enough, there were metric rings (2mm x 1.5mm x 4mm) used from about 1992 to 2002 when the Vortec bowed out. If you have access to the vehicle VIN and the original engine is still there, the metric ring engine is VIN '''P'''. There may be other VIN/applications that use metric rings so this has to be checked, regardless.
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