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Genuine-specification valve stem seal replacement for SINOTRUK HOWO diesel engines. Part number VG1560040032. Essential engine component in regular maintenance and overhaul kits.
SINOTRUK OEM-Compatible Engine Valve Seal – Model VG1560040032 | For HOWO Truck Diesel Engines
Ensure maximum engine efficiency and prevent excessive oil consumption with this genuine-specification valve stem seal (Part No. VG1560040032) , designed specifically for SINOTRUK HOWO trucks equipped with WD615, D10, and MC05/MC07 series engines. This critical engine spare part plays a vital role in maintaining proper lubrication balance while preventing engine oil from leaking into the combustion chamber — a common cause of blue exhaust smoke and reduced performance.
Manufactured using high-temperature resistant NBR (nitrile butadiene rubber) or optional FKM (fluoroelastomer/Viton®) material, the VG1560040032 valve seal withstands extreme heat up to 250°C, aggressive blow-by gases, and prolonged exposure to diesel fuel and oil contaminants. Its precision-molded design ensures perfect fitment on the valve guide, offering long-term sealing integrity under heavy-duty operation.
This part is widely used in Sinotruk spare parts maintenance programs, especially during mid-life engine services, injector replacements, or turbocharger repairs. It fits both intake and exhaust valves across multiple models including HOWO A7, A5, T7H, T5G, cement mixers, dump trucks, and logistics vehicles.
Technical Specifications:
OEM Part Number: VG1560040032
Function: Valve Stem Oil Seal (Intake & Exhaust)
Material: High-Temp NBR or FKM (Optional)
Outer Diameter (OD): ~28.5 mm
Inner Diameter (ID): ~8.0 mm (fits standard valve stems)
Application: Diesel Truck, Bus, Construction Equipment
Sealing Type: Positive Contact Lip Seal with Retaining Spring
Packaging: 16 pcs/set (per engine), vacuum sealed per cylinder bank
Package Includes:
1 x Valve Seal Set (16 pcs total for full engine), Installation Guide (PDF available online)
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How to Install the VG1560040032 Valve Seal on SINOTRUK HOWO Engines:
Drain Coolant & Remove Valve Cover: Shut down engine, wait to cool, then drain coolant slightly below head level. Remove bolts and gasket from cylinder head cover.
Decompress Valves: Rotate engine to TDC (Top Dead Center) and lock camshaft to prevent valve drop.
Compress Valve Springs: Use a valve spring compressor tool to compress the spring and remove the keepers (collets).
Remove Old Valve Seal: Carefully pull off the old rubber seal from the valve guide using pliers or tweezers. Clean carbon deposits with brake cleaner.
Install New Valve Seal (VG1560040032): Slide the new high-temperature nitrile rubber or FKM (Viton®-type) seal onto the valve stem guide. Ensure it sits flush against the guide top.
Repeat for All Cylinders: Replace all worn seals during engine service to prevent oil consumption.
Reassemble & Test: Reinstall rocker arms, valve cover with new gasket, refill coolant, start engine, and check for blue smoke (oil burning) — indicates faulty seal installation.
