Note:
- The springs for the intake and exhaust valves are identical.
- Valve springs must be installed with the narrowed part (6) facing upwards.
1. Remove the valve springs (see above) and position them according to their position on the cylinder head for correct installation later.
2. Using a micrometer or caliper, measure:
- the height of the valve spring in a free state,
- the height of the valve spring in a compressed state,
- spring coil diameter,
- inner diameter of valve spring bottom and top,
- outside diameter of valve spring bottom and top.
Source is located on the website RenaultBook.ru
3. Install the valve spring in a special test stand and use it to check the height of the valve spring (X2) when compressed with a certain force.
Note:
The height of the valve spring (X2) should be:
- 33.80 mm under load 218-242 N;
- 24.80 mm under load 477-523 N.
4. Remove the valve spring from the test stand.