Genuine Sinotruk HOWO VG1238110153 Intermediate Exhaust Manifold - Heavy-Duty Ductile Iron Casting

Genuine Sinotruk HOWO VG1238110153 Intermediate Exhaust Manifold - Heavy-Duty Ductile Iron Casting

Technical Specifications

Installation Notes

Replacing an intermediate manifold requires precision. To avoid premature gasket failure or bolt snapping, please observe these professional guidelines:

1. Surface Preparation: Ensure the mounting faces on the cylinder head and the adjacent manifold sections are perfectly clean. Use a straightedge to check for flatness.

2. Always Use New Gaskets: Exhaust gaskets are "crush style" and should never be reused. Pair the VG1238110153 with high-quality multi-layer steel (MLS) gaskets for the best seal.

3. Anti-Seize Lubricant: Apply a high-temperature copper anti-seize lubricant to the manifold studs and bolts. This prevents "galling" and ensures easier removal during future maintenance.

4. Torque Sequence: Tighten the manifold bolts in a "star" pattern, starting from the center and working outwards. Tighten in three stages to reach the final OEM torque specification.

5. Heat Cycle Retorque: After the first 500-1,000 kilometers of operation, check the bolt tension. The constant expansion and contraction can sometimes cause bolts to settle.