Quote Originally Posted by kulotz View Post
meron po akong nabili na spark plug na bosch platinum sabi ng mekanik di na daw yun inaadjust so kinabit namin pino naman takbo pero at certain times bgla parang nwwlan ng power for a second tapos sinabi ko sa mekanik sabi niya hindi daw hiyang ng makina ung spark plug na iyon, totoo b un hindi ba nareremedyuhan ang current spark plug ko eh ngk at ang makina ko ay ga14de (sentra) anu po sa tingin niyo gagawin ko sa bosch na plug?

kulotz,
every parts store should have a spark plugs substitution catalog. the factors determining what spark plugs to use are:
1. heat range
2. reach- the threaded barrel length or your plugs might puncture your pistons
3. thread size-14 mm or 19 mm(1940's cold running vehicles)
4. resistor or non-resistor ( resistor to reduce electromagnetic interference and radio frequency interference)
5. seat type- gasket type or tapered seat
6. socket wrench size- 5/8 ", 13/16", 7/8"
7. tip design- single ground, twin ground, four ground, barrel ground
8. tip material- nickel, platinum or iridium
9. gap design
the platinum and iridium are used because they are designed for 60-100kmiles intervals between tuneup (labor is expensive outside of the third world countries, yomsayin'). if your engine is run at optimum performance, not too cold nor too hot, and the air/fuel mixture is around 14.7 pounds of air per 1 pound of fuel, it should last up to 60k miles
jick
instructor
guam community college