How to install LS piston rings скачать в хорошем качестве

How to install LS piston rings

A set of Hastings steel performance piston rings (Summit PN SM8531035) will be used to control the oil and compression, but the two top compression rings need to be filed to fit each cylinder before assembly can begin. Out of the box, the ring endgap is very small and needs to be filed to fit the cylinder bore using a piston ring filer like this one from Summit Racing (PN SUM-970011). Working slowly, Martelli sneaks up on the magic number for each ring’s endgap, 0.018 inch for the top rings and 0.023 inch for the second rings, carefully deburring the ends as he goes. Each ring must be installed in the bore a handful of times and measured using a feeler gauge until the desired endgap is achieved. With the compression rings filed to Martelli’s satisfaction, installation of the rings can begin, starting with the oil control rings. First, the spring-like expander ring is installed, followed by the upper and lower rails. Martelli installs the two oil rail rings so that their endgaps are 180 degrees opposite. It should also be noted that the oil rings did not need to be filed to fit Next, the Napier-style second ring is installed. Martelli ensures that any directional marking is pointed toward the top of the piston before inserting one end of the ring into the ring groove and then carefully rotating it into place. The top compression ring is installed in a similar manner. Martelli orients the top ring’s endgap at the top of the piston’s skirt, while the second ring is 180 degrees opposite. Once all the rings have been installed, Martelli is ready to begin dropping the slugs into their respective holes. A light coat of oil is applied to the rings and the piston, while a similar coat of assembly lube is applied to the upper and lower connecting rod bearings, before the piston is dropped into the cylinder bore, aided by an ARP piston installation tool.