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Caution

• If the camshaft is rotated with the timing chain removed and the piston at the top dead center position, the valve may contact the piston and the engine could be damaged. When rotating the camshaft with the timing chain removed, rotate it after lowering the piston from the top dead center position.

• When rotating the camshaft using a wrench on the cast hexagon, the wrench may contact the rocker arm and damage the rocker arm. To prevent damage to the rocker arm when holding the camshaft on the cast hexagon, use the wrench at engine rear side as shown in the figure to secure a clearance between the cam.

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Note

• Width at the cast hexagon of the camshaft is 22—24 mm {0.87—0.94 in}.

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1.Disassemble in the order indicated in the table.

Except MX-5 (ND)

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MX-5 (ND)

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Crankshaft Pulley Lock Bolt Disassembly Note

1.Hold the crankshaft using the SST.

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2.Remove the crankshaft pulley lock bolt.

Oil Pan Disassembly Note

1.Remove the oil pan using a separator tool.

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Engine Front Cover Disassembly Note

1.Remove the engine front cover installation bolts.

2.Using a screwdriver wrapped in a cloth, peel the sealant away a little at a time, and remove the engine front cover.

Caution

• Do not apply excessive force to the screwdriver. Otherwise, the engine front cover could be damaged.

• Be careful not to scratch or damage the seal surface. Otherwise, it could cause oil leakage.

Front Oil Seal Disassembly Note

1.Remove the oil seal using a flathead screwdriver with the tip protected by a clean cloth.

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Chain Tensioner Removal Note (Chain tensioner (type A))

1.While moving the exhaust camshaft back and forth in the direction of the arrow using a wrench on the cast hexagon, press down the link plate of the timing chain tensioner using a precision screwdriver and release the plunger lock.

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Note

• When moving the exhaust camshaft back and forth, the timing chain pushes the plunger in the chain tensioner making it easier to operate the link plate.

2.Push back the plunger slowly in the direction shown in the figure with the link plate still pushed down.

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3.Remove the screwdriver from the link plate with the plunger still pushed down.

4.Release the force slightly from the plunger, and move it back and forth 2—3 mm {0.08—0.11 in}.

5.Insert a wire with an approx. diameter of 1.5 mm {0.059 in} or a paper clip where the link plate hole and the tensioner body hole overlap to secure the link plate and lock the plunger.

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6.Remove the chain tensioner.

Chain Tensioner Removal Note (Chain tensioner (type B))

1.Insert a metal rod (diameter approx. 1.4 mm {0.055 in}, length approx. 55 mm {2.16 in}) into the hole in the body of the chain tensioner.

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2.Press the resister ring and unlock the plunger.

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3.Press the timing chain in the direction of the arrow and press in the chain tensioner plunger to the position where the groove and body hole are aligned.

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4.With the plunger pressed in, further insert the metal rod set in (1) above.

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Note

• The rod secures the plunger and releases the tension.

5.Loosen the power of the hand pressing the plunger and verify that the pressed-in rod does not move.

6.Remove the chain tensioner.

Oil Pump Driven Sprocket Disassembly Note

1.Hold the crankshaft using the SST.

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2.Remove the oil pump driven sprocket.