Another type of indirect-acting overhead camshaft.oil seals latest technology.
In a second type of indirect-acting overhead-camshaft engine, the cams bear against the ends of rocker arms.
To adjust the valve clearances, use a spanner or a socket wrench on the crankshaft-pulley bolt. Turn the engine in its normal direction of rotation until No. 1 piston is at the top dead centre (TDC) of the compression stroke.
In that position, the TDC marks on the timing scale and the pulley line up, and there is a clearance between the rocker and valve stem of both No. 1 cylinder valves (this happens only once every two crankshaft revolutions).
Check the clearances of numbers 1, 2, 3 and 5 valves by inserting the blade or blades of a feeler gauge between the rocker and valve stem.
The clearance is correct when the gauge is a close sliding fit between the two parts.oil seals latest technology.
If the clearance is wrong, either the blade cannot enter the gap or it is loose, so that you can move the rocker up and down with the blade in place.
If all these valves are correctly set, turn the crankshaft on one full turn until the TDC marks line up again, and check numbers 4, 6, 7 and 8 valves in the same way.
Adjust any incorrect clearance by slackening the locknut on the adjuster screw at the camshaft end of the rocker.
Use a screwdriver to turn the screw clockwise to decrease the clearance, the other way to increase it. When the clearance is correct, hold the screw steady while tightening the locknut, then re-check the clearance.oil seals latest technology.
In a second type of indirect-acting overhead-camshaft engine, the cams bear against the ends of rocker arms.
To adjust the valve clearances, use a spanner or a socket wrench on the crankshaft-pulley bolt. Turn the engine in its normal direction of rotation until No. 1 piston is at the top dead centre (TDC) of the compression stroke.
In that position, the TDC marks on the timing scale and the pulley line up, and there is a clearance between the rocker and valve stem of both No. 1 cylinder valves (this happens only once every two crankshaft revolutions).
Check the clearances of numbers 1, 2, 3 and 5 valves by inserting the blade or blades of a feeler gauge between the rocker and valve stem.
The clearance is correct when the gauge is a close sliding fit between the two parts.oil seals latest technology.
If the clearance is wrong, either the blade cannot enter the gap or it is loose, so that you can move the rocker up and down with the blade in place.
If all these valves are correctly set, turn the crankshaft on one full turn until the TDC marks line up again, and check numbers 4, 6, 7 and 8 valves in the same way.
Adjust any incorrect clearance by slackening the locknut on the adjuster screw at the camshaft end of the rocker.
Use a screwdriver to turn the screw clockwise to decrease the clearance, the other way to increase it. When the clearance is correct, hold the screw steady while tightening the locknut, then re-check the clearance.oil seals latest technology.
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