Checking and adjustment is carried out on a cold engine (at normal temperature).
Be careful, because the locations of the intake and exhaust valves are different from conventional engines.
1. Remove the following parts.
- Engine protection from the bottom
- Intercooler
- engine cover
- valve cover
2. Set the piston of the 1st cylinder to the TDC of the compression stroke.
By turning the crankshaft clockwise, install the left camshaft pin straight up.
Note: There is no position mark on the crankshaft pulley.
3. Apply alignment marks on the crankshaft pulley and on the oil pump.
4. Looking at the figure, measure the clearances in the valves marked in table No. 1 with the sign O.
Note: The firing order of the cylinders is 1-3-4-2.
The measurement is carried out using a special JIS probe.
Standard Clearances:
On a cold engine:
- Inlet: 0.28±0.04mm
- Outlet: 0.30±0.04mm
On a warm engine (at 80°C):
- Inlet: 0.33±0.056mm
- Outlet: 0.37±0.062 mm
5. Turn the crankshaft one revolution clockwise and set the piston of the 4th cylinder to the TDC position of the compression stroke.
6. Looking at the figure, measure the clearances in the valves marked in table No. 2 with the sign O (see next. page).
Table #1
Table number 2
7. If clearances are different from standard, adjust as follows.