Measuring Piston Projection

Measuring Piston Projection (Part 1 Of 2):

Measuring Piston Projection (Part 2 Of 2):

PROCEDURE
After replacing the pistons/conrods or machining the crankcase contact surface, it is necessary to measure the piston projection.

Measure projection between piston crown and contact surface of crankcase without the cylinder head gasket installed.

The measurement has to be carried out in the direction of the piston in order to eliminate the piston rock.

Measure piston projection at the two measuring points (arrows).

PROJECTION SPECIFICATIONS
- Piston projection (a) with new crankcase: 0.785-1.015 mm
- Piston projection (a) with machined crankcase: 0.985-1.215