Valve clearance — checking and adjustment [Toyota Duet M100]

1. Remove the ignition coils and cylinder head cover.

2. Set the piston of the first cylinder to TDC of the compression stroke.

a) Turn the crankshaft and align the mark on the pulley with the mark on the timing belt cover.

b) Make sure that the timing marks on the sprockets are facing upward as shown in the figure, otherwise turn the crankshaft one revolution.

3. Using a feeler gauge, check the clearance in the valve drive shown in the figure.

4. Turn the crankshaft one revolution and check the clearance in the valve drive shown in the figure.

Nominal clearance in the valve drive:

inlet 0.18 ^+0,055 _-0,035
graduation 0.31^+0,055 _-0,035

Note: Write down which valve clearances do not correspond to the nominal ones.

5. If the clearance is outside the specified limits, remove the camshafts and replace the tappets with new ones, adjusting the clearance.

a) Use a micrometer to determine the thickness of the removed tappet.

b) Calculate the thickness of the new tappet so that the valve clearance is within the recommended limits.

N = T + (A - B) mm

N - thickness of the new pusher,
T - thickness of the removed pusher,
A - measured clearance in this valve,
B - nominal clearance.

Note: The tappets are available in 29 sizes with a step of 0.02 mm and thickness from 5.12 mm to 5.68 mm. The tappet thickness designation is stamped on its inner side.

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c) Apply engine oil to the circumference of the tappets and install them into the tappet holes.

Note: After installation, make sure the tappets rotate freely.

6. Install the camshafts.

7. Install the cylinder head cover.

a) Apply sealant to the cylinder head cover in the areas shown in the figure.

Sealant: Three Bond TV 1280E or similar.