정기점검 수리 사례
총 비용
-
공임
-
부품비
-
소요 시간
-
2026. 7. 15. 작업
난이도 & 준비물
증상
너울링된 피스톤(knurled piston)이 무엇인지, 일반 피스톤과의 차이점, 그리고 너울링된 피스톤을 사용해야 하는 이유가 궁금함
처리 내용
너울링은 금속에 격자 무늬 스탬프를 눌러서 가공하는 공정으로, 일부 부분은 압축되고 다른 부분은 올라오게 됩니다. 주로 피스톤 스커트(skirt) 부분을 너울링 처리합니다. 너울링을 하는 이유는 두 가지입니다: 첫째, 피스톤 스커트가 더 많은 오일을 보유하도록 하여 실린더 벽과 피스톤 스커트의 윤활을 개선합니다. 둘째, 더 일반적인 이유로는 엔진을 재구성할 때 마모된 스커트를 가진 낡은 피스톤을 너울링 처리하여 마모로 인한 유격을 메워주고, 실린더 내에서 피스톤이 더 잘 맞도록 합니다. 이는 엔진 빌더가 부품 비용을 절감하려고 할 때만 수행됩니다. 피스톤 스커트의 너울링 부분에서 실제로 실린더 벽과 접촉하는 표면적이 매우 적기 때문에, 이 부분은 빠르게 마모됩니다.
출처
이 사례는 Stack Exchange (미국)에서 수집한 데이터입니다.
신뢰도 4.1점(높음) — 출처 소스의 전문성/검증구조를 기준으로 산정된 점수이며, 정확성을 보장하지 않습니다.
원문 보기 ↗다른 차종의 정기점검 사례
BMW M5
I started this thread really with a question about pros and cons of putting an AJP or something else in my scrap Cerbera and it has morphed into a project build thread over time. Brief history:I was thinking about buying myself a fun sports car, there's nothing new in the £50-80k range I would particularly be interested in. Had to feel special, had to be light, "analogue" and not overly-assisted. Had to be manual and i prefer a large capacity NA to forced induction. Ford Mustang maybe, perhaps not quite special enough and a bit porky. Emira - I love Lotus and have had a few but i'm not a fan o
BMW X5
After writing off my BMW 320d halfway through the month, I suddenly found myself in the market for a new car.Once the insurance payout landed, I had just under £5,500 to play with after paying my excess. I spent hours trawling AutoTrader trying to find the right replacement.I'd lined up a BMW X5 that was slightly over budget and was due to view it today... only for it to sell yesterday before I got the chance. Frustrating, but that's just how it goes.I kept looking, but nothing else really grabbed me.Then I spotted a Range Rover Sport on AutoTrader just five miles away. I called the dealership
BMW X5
After writing off my BMW 320d halfway through the month, I suddenly found myself in the market for a new car.Once the insurance payout landed, I had just under £5,500 to play with after paying my excess. I spent hours trawling AutoTrader trying to find the right replacement.I'd lined up a BMW X5 that was slightly over budget and was due to view it today... only for it to sell yesterday before I got the chance. Frustrating, but that's just how it goes.I kept looking, but nothing else really grabbed me.Then I spotted a Range Rover Sport on AutoTrader just five miles away. I called the dealership
BMW M5
I started this thread really with a question about pros and cons of putting an AJP or something else in my scrap Cerbera and it has morphed into a project build thread over time. Brief history:I was thinking about buying myself a fun sports car, there's nothing new in the £50-80k range I would particularly be interested in. Had to feel special, had to be light, "analogue" and not overly-assisted. Had to be manual and i prefer a large capacity NA to forced induction. Ford Mustang maybe, perhaps not quite special enough and a bit porky. Emira - I love Lotus and have had a few but i'm not a fan o