How to Check

Perform inspection as follows after removal, installation or replacement of camshaft or valve-related parts, or if there are unusual engine conditions regarding valve clearance.

1. Remove rocker cover. Refer to Removal and Installation .
2. Measure the valve clearance with the following procedure:
   • Set No. 1 cylinder at TDC of its compression stroke.
     1. Rotate crankshaft pulley (1) clockwise and align TDC mark [no paint (B)] to timing indicator (A) on front cover.

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        (C)	: White paint mark (Not used for service)

     2. At the same time, check that both intake and exhaust cam noses of No. 1 cylinder face inside ( ) as shown in the figure.

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        (1)	: Camshaft (EXH)
        (2)	: Camshaft (INT)
        	: Engine front

     3. If they do not face inside, rotate crankshaft pulley once more (360 degrees) and align as shown in the figure.
   • Using a suitable tool, measure the clearance between valve lifter and camshaft.

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     Valve clearance

     : Refer to Service Data .

     • By referring to the figure, measure the valve clearances at locations marked \"x\" as shown in the table below [locations indicated with black arrow ( )] with a suitable tool.

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       (A)	: Exhaust side
       (B)	: No. 1 cylinder
       (C)	: No. 2 cylinder
       (D)	: No. 3 cylinder
       (E)	: No. 4 cylinder
       (F)	: Intake side
       	: Engine front

       Measuring position		No. 1 CYL.	No. 2 CYL.	No. 3 CYL.	No. 4 CYL.
       No. 1 cylinder at compression TDC	EXH	x	x
       	INT	x	x

3. Set No. 4 cylinder at TDC of its compression stroke.
   • Rotate crankshaft pulley (1) one revolution (360 degrees) and align TDC mark [no paint (B)] to timing indicator (A) on front cover.

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     (C)	: White paint mark (Not used for service)

   • By referring to the figure, measure the valve clearance at locations marked \"x\" as shown in the table below [locations indicated with black arrow ( )] with a suitable tool.

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     (A)	: Exhaust side
     (B)	: No. 1 cylinder
     (C)	: No. 2 cylinder
     (D)	: No. 3 cylinder
     (E)	: No. 4 cylinder
     (F)	: Intake side
     	: Engine front

     Measuring position		No. 1 CYL.	No. 2 CYL.	No. 3 CYL.	No. 4 CYL.
     No. 4 cylinder at compression TDC	EXH	x			x
     	INT	x		x

4. If out of standard, perform adjustment. Refer to Work Procedure .