Valve taper gasket measuring method (physical foaming gasket)
The meaning of the valve cylinder value
1. There are numbers in the valve lifter. For example, N342 indicates 3.342 mm, N3000 indicates 3.000 mm, and N302 indicates 3.302 mm. The N725 indicates 3.725 mm. Ante is the practice thickness of the directly labeled valve taper.
How to replace the valve taper:
1. Use the two-disc method to measure the valve clearance between the original camshaft and the valve lifter with a feeler gauge in the cold state. And divided into 1 and 2. . . . . Enter 8, row 1, row 2. . . . . Different gaps of the valves of row 8. If 1 = 45 wire = 0.45 mm, enter 2 = 15 wire = 0.15 mm
2. Disassemble the valve lifter on the original car, corresponding to 1 and 2. . . . Into 8. Row 1, row 2,. . . . Row 8 records and uses the 0-25 mm micrometer micrometer to measure the thickness of the inner core of the original valve taper to the top of the valve taper, such as 1 = 3. 350 mm, 2 = 3.380 mm.
3. Calculate the difference and convert it to the desired value.
Example 1: The thickness of the practice 1 is 3.350 mm. The gap is 0. 45 mm. According to the 4S specification, 0. 25 mm should be reserved for the specification gap. That is, the original car exceeded the specification gap of 0. 20 mm. In the calculation, it should be thickened by 0. 20 mm on the original car scale to reach the specification gap. That is, 3.350 mm + 0. 20 mm = 3.550 mm thick taper. 3. The 550 mm thick taper Changan Ford has no such number. Only use the closest ones that are 3.542 or 3.562 mm.
Example 2: The thickness of the practice 2 was 3.380 mm. The gap is 0. 15 mm. According to the 4S specification, 0. 25 mm should be reserved for the specification gap. That is, the original car Xiaoyu specification gap is 0. 10 mm. When calculating, it should be reduced by 0. 10 mm on the original vehicle scale to reach the specification gap. That is 3. 380 mm - 0. 10 mm = 3. 370 mm thick taper. 3. The 370 mm thick taper Changan Ford has no such number. Can only be applied with the closest 3.362 or 3.382 mm,
And so on. Calculate the scale of 16 valve lifters.