NPR of AMERICA, INC

1 NPR of america , INC1973 ~ 2012 ESTABLISHED:1973 PRODUCTS:PISTON RINGS, PISTONSORGANIZATION:AAIA (Automotive Aftermarket IndustryAssociation)NPR of america , INC1973 ~ 2012 ESTABLISHED:1973 PRODUCTS:PISTON RINGS, PISTONSORGANIZATION:AAIA (Automotive Aftermarket IndustryAssociation)TABLE OF CONTENTSNOA YEAR 2012 CATALOG: IndexINTRODUCTION: i ~ xviiThe Most Important Functions of NPR Piston RingsiThe Quality Advantages of NPR Steel RingsiiPiston Ring Name of PartsiiiExplanation of NPR Ring set Codeiv ~ viInstallation Instruction of Oil Rings : Series 777viiInstallation Instruction of Oil Rings : Series 777, EA Eng.

2 ViiiInstallation Instruction of Oil Rings : Series 555ixInstallation Instruction of Compression RingsxEnd Gap Informationxi ~ xiiCylinder Honing Informationxiii ~ xivPiston Surface TreatmentxvAbbreviation & Words in this WarrantyxviiNew Item or New Part Number Listxviii ~ xixDiscontinued Item ListxxUS APPLICATION CATALOG: P1 ~ P225 MAIN CATALOG ( engine SIZE SEQUENCE):US APPLICATIONP1 ACURAP2 ~ P5 AUDIP6 ~ P13 BMWP14 ~ P23 BUICKP98 ~ P153 CADILLACP98 ~ P153 CHRYSLERP24 ~ P63 CHEVROLETP98 ~ P153 DAEWOOP64 ~ P65 DAIHATSUP66 ~ P67 DODGEP24 ~ P63 EAGLEP24 ~ P63 FIATP68 ~ P69 FORDP70 ~ P97 GENERAL MOTORSP98 ~ P153 GEOP98 ~ P153 NOA YEAR 2012 CATALOG.

3 IndexHONDAP154 ~ P163 HUMMERP98 ~ P153 HYUNDAIP164 ~ P167 INFINITIP168 ~ P171 ISUZUP172 ~ P177 JAGUARP178 ~ P179 JEEPP24 ~ P63 KIAP180 ~ P183 LAND ROVERP184 ~ P185 LEXUSP186 ~ P191 LINLOLNP70 ~ P97 MAYBACHP192 ~ P193 MAZDAP194 ~ P203 MERCEDES-BENZP204 ~ P215 MERCURYP70 ~ P97 MERKURP70 ~ P97 MINIP216 ~ P217 MITSUBISHIP218 ~ P227 NISSANP228 ~ P239 OLDSMOBILEP98 ~ P153 PLYMOUTHP24 ~ P63 PONTIACP98 ~ P153 PORSCHEP240 ~ P241 SAABP242 ~ P243 SATURNP98 ~ P153 SCIONP244 ~ P245 SMARTP246 ~ P247 SUBARUP248 ~ P255 SUZUKIP256 ~ P259 TOYOTAP260 ~ P273 VOLKSWAGENP274 ~ P281 VOLVOP282 ~ P291 NEW PISTON BUYERS GUIDE: P293 ~ P364 NOA YEAR 2012 CATALOG: IndexFORKLIFT & MEDIUM SIZE DIESEL ENGINES:P367 ~ P402 MAIN CATALOG ( engine SIZE SEQUENCE):CHRYSLERP368 FORDP369 GMCP370 ISUZUP371 ~ P373 MAZDAP374 ~ P375 MITSUBISHIP376 ~ P384 NISSANP385 ~ P393 TOYOTAP394 ~ P402 EXPORT PISTON RING: P405 ~ P523 MAIN CATALOG ( engine NUMBER SEQUENCE).

4 ASIA GASOLINEP406 ASIA DIESELP407 DAEWOO GASOLINEP408 DAEWOO DIESELP409 DAIHATSU GASASOLINE P410 ~ P411 DAIHATSU DIESELP412 HINO DIESELP413 ~ P424 HONDA GASOLINEP425 ~ P431 HYUNDAI GASOLINEP432 ~ P433 HYUNDAI DIESELP434 ~ P435 ISUZU GASOLINEP436 ~ P438 ISUZU DIESELP439 ~ P451 KIA GASOLINEP452 KIA DIESELP453 ~ P454 KOMATSU DIESELP455 ~ P458 MAZDA GASOLINEP459 ~ P463 NOA YEAR 2012 CATALOG: IndexMAZDA DIESELP464 ~ P466 MITSUBISHI GASOLINEP467 ~ P473 MITSUBISHI DIESELP474 ~ P483 NISSAN GASOLINEP484 ~ P493 NISSAN DIESELP494 ~ P501 SUBARU GASOLINEP502 ~ P503 SUZUKI GASOLINEP504 ~ P506 TOYOTA GASOLINEP507 ~ P518 TOYOTA DIESELP519 ~ P523 EXPORT PISTON : P525 ~ P549 MAIN CATALOG ( engine NUMBER SEQUENCE).

5 DAEWOO GASOLINEP526 DAIHATSU DIESELP527 HINO DIESELP528 HONDA GASOLINEP529 HYUNDAI GASOLINEP530 HYUNDAI DIESELP531 ISUZU GASOLINEP532 ISUZU DIESELP533 ~ P534 KIA GASOLINEP535 KIA DIESELP536 MAZDA GASOLINEP537 MAZDA DIESELP538 MITSUBISHI GASOLINEP539 MITSUBISHI DIESELP540 NISSAN GASOLINEP541 NISSAN DIESELP542 ~ P543 SUZUKI GASOLINEP544 TOYOTA GASOLINEP545 ~ P546 TOYOTA DIESELP547 ~ P549 NOA YEAR 2012 CATALOG: IndexMEXICO APPLICATION CATALOG: P551 ~ P563 MAIN CATALOG ( engine NUMBER SEQUENCE):CHRYSLERP552 ~ P553 DODGEP552 ~ P553 FORDP554 ~ P555 GMCP556 ~ P557 HYUNDAIP556 ~ P557 JEEPP558 ~ P559 NISSANP560 ~ P561 SUZUKIP560 ~ P561 TOYOTAP560 ~ P561 VOLKSWAGENP562 ~ P563 2012 NPR of america , (Nippon Piston Ring) Piston The most important functions of NPR Piston s most important principles of Piston Rings are:a.

6 Function (Reliability).b. Reduced Low Low Production of each 1st, 2nd, and Oil Control Rings (please see below figures):1) Gas Seal:The seal must perform during both the compression stroke and expansion stroke to provide maximumperformance. This is the best achieved with the proper amount of lubricant oil film on the piston ring cylindercontact point and complete contact of the bottom of the piston ring against the piston groove. Therefore, theproper seal improves performance and decreases oil ) Oil Control:The function of the oil control ring is to assure the proper amount of lubricant film.

7 By providing the correctlubricant film for all piston ring contact points on the cylinder, this will prevent scuffing and excessive , an excessive amount of lubricant film will force too much oil into the combustion chamber resultingin soot in the ) Heat Conduction:The function of heat conduction is to allow heat to escape from the piston head to cylinder wall and then tocooling water and/or cooling fins. If the heat is not allowed to decrease, oil temperature will increased. Theseresults in reduced oil viscosity and increased oil ) Bearing:Pistons have reciprocation motion in both expansion and compression strokes.

8 Because of this the piston exertsa higher pressure against one side of the cylinder wall during the expansion stroke. The piston ring assures aproper clearance between the piston and the cylinder wall while maintaining complete contact around the entirecircumference of the cylinder wall. This prevents both gas blow by and piston scoring. 2012 NPR of america , The quality advantages of NPR Steel s unrivaled Piston Rings and Pistons will satisfy the needs of today s higher performance engine . AllPiston Rings and Pistons listed in this catalog are the results of our hard bench engine tests taking intoconsideration material composition and surface treatment design.

9 These tests on actual engines were conductedwith the cooperation of the automobile manufacturer to assure a proper match to your engine s Steel vs. Cast Iron vs. Ductile s modern engines have higher operating temperatures, higher compression, higher stress and higherrestrictions on emissions. These conditions have put greater demands on piston rings. Steel rings outperformtheir cast iron predecessors in reduced oil consumtiopn, reduced blow by, reduced wear, reduced breakage, andreduced consumptionSteel piston rings allow for a reduction in the radial wall thickness.

10 This (thinner) and lighter design seals morecompletely against the ring groove. Also, the steel ring with greater strength, reduced width conforms better toless than perfect cylinder bores. These two advantages reduce oil consumption by move than 30%.Durability of SteelThe inherent strength of high alloy steel dramatically reduces the chance of ring breakage. Late model engineshave reduced their ring thickness from to and mm. Steel also provides for longer service lifebecause ring wear is reduced by over 60%. Simply stated steel rings last 50% Piston RingsAdvantages:Higher tensile yield fatigue ring :Better stress rings side grooves pound service oil blow-by TreatmentNPR s surface treatment is also very high quality, and the result of our technology.