Product information "Cylinder bolt 22 x 7.5mm Shineray 250 ST-9E STIXE ST-3 ST-5 Spyder ATV Quad"
Precise Alignment for Your Engine! – Cylinder Dowel Pin 22 x 7.5 mm for Shineray 250
Exact Centering Sleeve – Essential for proper assembly of cylinder and head
Small parts, big impact! This Cylinder Dowel Pin (also known as a centering sleeve) ensures the exact alignment between the crankcase, cylinder, and cylinder head. This precision is vital to ensure that the sealing surfaces match perfectly and oil passages are aligned. Made of robust steel, this pin provides the stability needed to absorb shear forces and withstand vibrations. Suitable for the entire Shineray 250cc water- and air-cooled series.
Technical Specifications & Details
Component: Dowel Pin / Centering Sleeve
Dimensions: 22 mm (Length) x 7.5 mm (Diameter)
Material: Hardened steel
Compatibility:
Shineray: 250 ST-9E, STXE, STIXE, ST-3, ST-5
Models: Spyder ATV, Quad 250cc
Also fits many other Chinese engines (Loncin, Zongshen) with identical bore sizes.
Benefit: Prevents the head gasket from slipping during the assembly process.
Visual Compatibility: Before installation, perform a visual check. Measure the length (22 mm) and outer diameter (7.5 mm) of your old pin. Dowel pins may vary slightly across different production years.
Cleanliness: Ensure that the holes in the crankcase and cylinder head are perfectly clean and free of old oil or gasket residue. Debris in the hole can prevent the pin from seating fully.
Smooth Fit: The pin should insert with light pressure. If it sticks, carefully clean the bore. Never use force to hammer the cylinder or head into place.
Completeness: Check your exploded view diagram to see how many pins are required (usually 2 or 4 per assembly). Missing dowel pins can lead to leaks and engine damage.
Corrosion Protection: A very thin film of engine oil on the pin facilitates installation and protects against future seizing due to corrosion
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