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Home > Knowledge > Weichai National VI WP13SNG engine, valve clearance adjustment method

Weichai National VI WP13SNG engine, valve clearance adjustment method

Author:F-Diesel Date:September 17, 2025 2:40 AM Tag:[ engine , diesel engine valve clearance setting , brake valve adjustment tool , cylinder valve clearance sequence ]
This knowledge base introduces or describes the This guide details the WP13SNG Youshun engine brake valve clearance adjustment procedure, including flywheel position marks, intake and exhaust valve clearance settings, brake rocker arm clearance values, and the correct adjustment sequence for all six cylinders.

Table of contents

1、WP13SNG Youshun Brake Valve Clearance Adjustment Method

 

1. WP13SNG Youshun Brake Valve Clearance Adjustment Method

 

1.1. Facing the flywheel, turn the flywheel counterclockwise from the OT line to the mark "1 6" on the outer edge of the flywheel. Check whether the intake clearance of cylinder 1 is adjustable. If so, adjust the intake valve clearance of cylinders 1, 4, and 5 by 0.5mm, and the exhaust valve clearance of cylinders 1, 3, and 5 by 0.8mm. Use the dedicated tool to adjust the brake rocker arm clearance of cylinder 6 to 2.8mm. If the intake clearance of cylinder 1 is not adjustable, proceed directly to the clearance adjustment in step d, then push forward.

1.2. Facing the flywheel, turn the flywheel counterclockwise to the mark "2 5" on the outer edge of the flywheel. Use the dedicated tool to adjust the brake rocker arm clearance of cylinder 2 to 2.8mm.

1.3. Facing the flywheel, turn the flywheel counterclockwise to the mark "3 4" on the outer edge of the flywheel. Use the dedicated tool to adjust the brake rocker arm clearance of cylinder 4 to 2.8mm.

1.4. Turn the flywheel counterclockwise toward the flywheel to the mark "1 6" on the outer edge. Adjust the intake valve clearance of cylinders 2, 3, and 6 by 0.5mm. Adjust the exhaust valve clearance of cylinders 2, 4, and 6 by 0.8mm. Use the dedicated tool to adjust the brake rocker arm clearance of cylinder 1 by 2.8mm.

1.5. Turn the flywheel counterclockwise toward the flywheel to the mark "2 5" on the outer edge. Use the dedicated tool to adjust the brake rocker arm clearance of cylinder 5 by 2.8mm.

1.6. Turn the flywheel counterclockwise toward the flywheel to the mark "3 4" on the outer edge. Use the dedicated tool to adjust the brake rocker arm clearance of cylinder 3 by 2.8mm. Valve clearance adjustment diagram.