Engine Rings Des Moines IA
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.
Aamco Transmissions Complete Car Care
(515) 954-7209 3416 SE 14th St
Des Moines, IA Aamco Transmissions Complete Car Care (515) 954-7209
3416 SE 14th St
Des Moines, IA 50320
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(515) 278-7850, 001-2004 4224 Merle Hay Road
Des Moines, IA Bob Brown Chevrolet (515) 278-7850, 001-2004
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Des Moines, IA 50310
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Clive, IA Westside Auto Pros (515) 225-9090, 001-2004
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Des Moines, IA Midas Des Moines 515-243-1253
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Des Moines, IA Tlc Fast Lube (515) 244-8329
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Des Moines, IA 50314
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(515) 257-7694 1501 Se Cortina Drive
Ankeny, IA Ankeny Auto Body 1 (515) 257-7694
1501 Se Cortina Drive
Ankeny, IA 50021
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(515) 243-8185, 001-2004 901 - 8th Street
Des Moines, IA Beckley Automotive Services (515) 243-8185, 001-2004
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Des Moines, IA 50309
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Des Moines, IA Wal-Mart Supercenter (515) 274-6618
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(515) 243-1253 2010 Ingersoll Ave
Des Moines, IA Midas Auto Service Experts (515) 243-1253
2010 Ingersoll Ave
Des Moines, IA 50312
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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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