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| caution | Never turn the crankshaft counterclockwise. |
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| note | Lightly press down the tail end of the precision flat-tipped screwdriver to press up the tip of the precision flat-tipped screwdriver inserted to the timing chain tensioner to unlock. |
| caution |
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| note | With the timing chain tensioner unlocked, insert the special tool MB992103 along the tension side of the valve timing chain, according to the special tool MB992103 top shape. The special tool MB992103 can be inserted smoothly to the position where the special tool MB992103 insertion guideline aligns with the timing chain case assembly top surface (B in the figure), and the spread timing chain tension side guide can be hold (C in the figure). |
| caution | The valve timing chain may be bitten by other parts. After sagging the valve timing chain, never rotate the crankshaft. |
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| caution | Be careful not to drop the camshaft bearing. |
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| caution | When the camshaft bearing cap mounting bolts are loosened at once, the mounting bolts jump out by the spring force and the threads are damaged. Always loosen the mounting bolts in four or five steps. |
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| caution | The valve timing chain may be bitten by other parts. After removing the camshaft and camshaft sprocket assembly, never rotate the crankshaft. |
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| caution | After removal of the oil feeder control valve, be careful to prevent dust from getting into the oil passage in the cylinder head. |
| caution |
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| note | Because the camshaft bearing thrust cap and camshaft bearing cap are the same in shape, check the bearing cap number and additionally its symbol to identify the inlet and exhaust sides for correct installation. |
| caution | Be careful not to drop the camshaft bearing. |
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| note | Lightly press down the tail end of the precision flat-tipped screwdriver to press up the tip of the precision flat-tipped screwdriver inserted to the timing chain tensioner to unlock. |
| caution |
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| note | With the timing chain tensioner unlocked, insert the special tool MB992103 along the tension side of the valve timing chain, according to the special tool MB992103 top shape. The special too MB992103 can be inserted smoothly to the position where the special tool MB992103 insertion guideline aligns with the timing chain case assembly top surface, and the spread timing chain tension side guide can be hold. |
| caution | When installing the camshaft and camshaft sprocket assembly (exhaust side), be careful not to let the camshaft bearing which is installed to the front cam bearing deviate from its position. |
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| caution | When the mounting bolts are tightened with the camshaft bearing front cap tilted, the camshaft bearing front cap is damaged. Install the camshaft bearing front cap properly to the cylinder head and camshaft. |
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| caution | Sufficiently check that there is no residual oil on the place where degreasing is performed. If fingerprints are left, do not touch it with bare hands after the degreasing, since the oils from your fingers will harm the seal ability. |
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| note | Install the rocker cover assembly immediately after the application of sealant. |
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| caution | After the installation, until a sufficient period of time (one hour or more) elapses, do not apply the oil or water to the sealant application area or start the engine. |