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Engine Rings Louisville KY

Ring sets in late-model engines are running hotter than ever before. As rings move up higher and higher on the piston to reduce emissions, they are exposed to more heat. A decade ago, the land width between the top ring groove and piston crown was typically 7.5 to 8.0 mm.
Highland Automotive
(502) 219-3581
2036 Midland Ave
Louisville, KY
Medleys Auto & Truck Repair
(502) 272-0497
3913 Shepherdsville Road
Louisville, KY
St. Matthews Import Service
(502) 896-0305, 001-2004
280 North Hubbards Lane
Louisville, KY
Ken Towery's Auto Care #3
(502) 425-4402, 001-2004
7511 Shelbyville Road
Louisville, KY
Ken Towery's Auto Care #10
(502) 367-2275, 001-2004
6919 Southside Drive
Louisville, KY
Medleys Auto
(502) 509-6911
633 S. Campbell Street
Louisville, KY
Simpsonville Auto
(502) 257-8905
6986 Shelbyville Rd
Simpsonville, KY
Barnes Auto Service, Inc.
(502) 966-8644
3730 Bishop Lane
Louisville, KY
John Overley Automotive
(502) 964-8459, 001-2004
3800 Fern Valley Road
Louisville, KY
MSD Fleet Services
(502) 540-6994, 001-2004
3050 Commerce Center Place
Louisville, KY
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Engine Rings



By Larry Carley
4/1/2007

Adapted from Larry Carley's article in Underhood Service



The Extreme Life of Piston Rings and the Technology Used
in their Development

Piston rings have one of the toughest jobs inside an engine. Theyre slammed up and down between the ring lands thousands of times a minute, theyre subjected to searing temperatures and extreme pressures, and theyre constantly scraping back and forth against the cylinder walls. In spite of all of this, the rings are expected to seal combustion and vacuum, prevent blowby, control oil consumption, keep the cylinder walls lubricated, cool the pistons, and last but certainly not least, last almost forever (150,000 miles plus in a passenger car/light truck engine or up to 1 million miles in a heavy-duty over-the-road diesel)!

Its a demanding list, yet most rings are up to the task and hold up pretty well assuming the right rings are used for the application, the cylinders are finished properly and the rings are installed on the pistons correctly. Obviously, the ring sealing requirements of a high-revving racing engine or a hard-working diesel engine are much more demanding than those of a mild stock engine. So with that in mind, lets look at some of the latest thinking as it applies to piston ring designs, materials and coatings.

Stock Rings
With so many late-model engines running thinner, low-tension moly-faced ductile iron and steel rings, one might think cast iron rings are fading into histor...

Click here to read the rest of the article from Tomorrow's Technician

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