![]() ![]() Changing a single shim size will only bring it 0.01 mm closer to perfection. But if the valve adjustment is within 0.02 mm of the specification, do not remove the shim. The valve clearance specifications for these engines are:Īn assortment of 60 shims is available, in 0.01 mm increments, so it’s theoretically possible to get each valve adjusted to exactly its clearance specification. ![]() The exhaust valve clearances are more easily measured while working from beneath the vehicle. Keep the thickness gauge as close to parallel with the shim surface as possible. Insert a thickness gauge between the heel of the camshaft and the adjusting shim. Valve Adjustment Subaru DOHC 2.5: In this position, the #1 intake valve and #3 exhaust valve clearances can be inspected and the clearance adjusted as necessary. In this position, the #1 intake valve and #3 exhaust valve clearances can be inspected and the clearance adjusted as necessary. To begin the procedure, turn the crankshaft pulley clockwise until the camshaft sprocket arrows are pointing to the position shown in the figure below (approximately 2 o’clock position). The position of these arrows determines which valves are to be measured and/or adjusted. Both right side resin camshaft sprockets have a single arrow embossed on their front surfaces. ![]()
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