Measure the unloaded spring length
Characteristic
Standard length
(1.602)in (40.7)mm
Allowable limit after use:
(1.543)in (39.2)mm
- Clean the valve seats of any carbon residues.
- Using the Prussian blue, check the width of the
impression on the valve seat "V".
Characteristic
Standard value:
(0.039÷0.051)in (1 ÷ 1.3)mm
Limit allowed:
(0.062)in (1.6)mm
- If the impression width on the valve seat is larger than the prescribed limits, true the seats with a 45°
mill and then grind.
- In case of excessive wear or damage, replace the head.
- Measure the diameter of the valve stems in the
three positions indicated in the diagram.
STANDARD DIAMETER
Specification Desc./Quantity
Intake: (0.1951÷0.1957)in (4.957÷4.972)mm
Exhaust: (0.1942÷0.1948)in (4.935÷4.950)mm
MINIMUM DIAMETER PERMITTED
Specification Desc./Quantity
Intake: (0.194)in (4.942)mm
Exhaust: (0.192)in (4.92)mm
- Calculate the clearance between the valve and the valve guide.
Beverly 400 E5 Technical Data
DT - 37
To Next Page
Loading...
