What are the methods for removing rocker arms and lash adjusters in 4.0L SOHC V6 engine on Ford Explorer?

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We find two ways of removing the rocker arms and lash adjusters in this model engine. The manufacturer describe a technique, by which the rocker arms can be withdrawn without having to withdraw the camshaft(s), using a valve spring compressor for SOHC engine. This compressor employs the camshaft as its fulcrum and, with a ratchet or a breaker bar, compresses the valve spring in an attempt to reduce pressure on the rocker arm. The other approach is much more destructive, involving the stripping of the camshaft. This two ways give the same readings but use of the manufacturers special tool is way easier if available. Firstly, take off the valve cover or covers and then have the valve spring compressor placed so that it removes the required pressure to free the rocker arm. All the camshaft rocker arms and hydraulic lash adjusters need to be fitted back in their correct locations, therefore one should take great care and make sure that after disassembly none of the parts get misplaced and as such one should make sure that all the parts get labeled so that during assembly there is no confusion. Then, which is done to reduce the amount of backlash between the valve stem and the bucket take out the hydraulic lash adjuster and Ricardo recommends that it together with the rocker arm must be arranged in an orderly manner to facilitate its replacement. If the vehicle has high mileage, the adjusters may be gummed up and somewhat stubborn, they can be removed with penetrating oil. Check all adjusters for signs of wear or damage because they tend to become clogged as miles are put on the engine and think about new ones if there is doubt the condition of them or if there is noise coming from the valves. Using a thin wire or paper clip it is possible to observe the movement of the plunger to be not more than 1.5mm in total. In the case of any adjustment that requires replacement, it is preferable to replace the whole set so that no further repairs will be required. Also check the rocker arms for wear or damage at the roller area, on the top edge of the stem, and at the lash adjuster contact place. Before fixing the lash adjusters, purge the air from them by placing the adjusters vertically, immersed in the oil and proceed to pull the plunger upwards and downwards to charge the adjuster. Coat the end of the valve stem, the rocker arm, and the hole where the lash adjuster is to go with clean engine oil and then fit the lash adjusters and the rocker arms as the valve spring is compressed. If applied, removal is relatively simple and the installation process is exactly the opposite of removal. When replacing the adjusters, it is advisable that there will be some noise when starting the engine until all the lash adjusters have been purged of any air; while operating the engine, bring it from idle to 3000 rpm, then give it a cool down; on restarting, the noise should be gone.

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Ford Explorer Valve Rocker Arm Assembly

Ford Explorer Valve Rocker Arm Assembly

Ford Explorer Valve Rocker Arm Assembly

Ford Explorer Valve Rocker Arm Assembly

Ford Explorer Valve Rocker Arm Assembly

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Ford Explorer Valve Rocker Arm Assembly

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