Valve Stem Seals For CAT 3412 V12 Diesel Engine Rubber Valve Oil Seals

• Product Name: 3412 Valve Stem Oil Seal
• Compatible Engine: CAT 3412 V12 Diesel Engine
• Material: Fluorine rubber outer casing + metal inner skeleton
• Full Set Quantity: 24 pieces per complete 3412 engine (V12, 2 valves per cylinder)

1. Integrated metal inner frame ensures stable installation on valve guide, no loose displacement under high-speed valve reciprocating movement
2. Fluorine rubber material withstands high engine operating temperature, excellent oil resistance and aging resistance, long service life
3. Precision inner hole fits valve stem tightly, effectively scrape excess lubricating oil on the valve stem
4. Standard size fully matches original 3412 engine valve train assembly, direct replacement without modification

These valve stem oil seals are core small sealing parts for CAT 3412 V12 heavy-duty diesel engine cylinder head assembly. Installed on the intake and exhaust valve guides, their main function is to control the amount of lubricating oil flowing down along the valve stem, avoiding excessive oil being sucked into the cylinder for combustion.

Widely used for CAT 3412 marine main engines, large diesel generator sets and industrial power equipment major repairs. Worn, hardened or cracked valve stem seals will lead to excessive engine oil consumption, blue smoke from exhaust, carbon deposit accumulation on pistons and valves, and reduced engine power output. It is a mandatory consumable part in full cylinder head overhaul kits.

We supply parts for Kubota, Cumm ins, CAT, Perkins, Yanmar, Isuzu, Komatsu, Mitsubishi, Hino, Nissan, Vo lvo, Deutz, Doosan, Daewoo, John D eere, Scania, Hyundai, JCB etc.

1. How many valve stem seals does one CAT 3412 engine need? 3412 is V12 engine with 2 valves per cylinder, total 24 valve stem seals for one engine.
2. What symptoms indicate failed valve stem seals? Blue smoke when starting or accelerating, frequent low oil level, heavy carbon buildup on spark plugs and combustion chamber.
3. Why use fluorine rubber instead of ordinary nitrile rubber? Fluorine rubber can resist long-term high temperature inside cylinder head, not easy to harden and fail, more suitable for large heavy-duty diesel engines.
4. Do I need to replace all seals together during overhaul? It is recommended to replace all 24 valve stem seals at the same time when disassembling the cylinder head to avoid secondary disassembly cost.