C5477376 Piston Ring is a multi-functional elastic ring set fitted onto piston grooves of DFCV B6.2 diesel engine. It forms airtight sealing between piston and cylinder liner to lock combustion pressure, scrap excess oil off liner wall and regulate proper oil film for lubrication. This aftermarket replacement ring set solves low cylinder pressure, burning oil, blow-by gas and poor power output caused by ring fracture, loss of tension and worn sealing face after long working cycles. Reliable sealing improves combustion efficiency and cuts lube oil waste for medium-heavy trucks running mixed highway and regional delivery routes.

Product Advantages Made of wear-resistant alloy steel with surface nitriding treatment to resist thermal erosion and fatigue. Different rings adopt exclusive profile designs for compression and oil control separately. The opening gap is pre-processed strictly following factory standard. Each piston ring undergoes tension test and surface sealing inspection before shipment, OEM dimension for direct installation during engine rebuild.

Applicable Models Fit for DFCV trucks equipped with B6.2 diesel engine, widely used for intercity cargo transportation and heavy-load regional distribution.

FAQ

Q1: What symptom will occur once the oil control ring loses its scraping ability?
A1: Blue smoke appears during acceleration and the engine oil level drops noticeably after a short run.
Q2: Is there a specific rule for staggering ring gaps during assembly?
A2: Yes, arrange each ring opening at different angles instead of aligning all gaps together.
Q3: What check should be carried out after ring installation?
A3: Measure ring end gap and side clearance strictly to avoid ring sticking inside grooves.