Honda 12310-R40-A00 Cover, Cylinder Head

You can Select Your Vehicle to check if 12310-R40-A00 fits your vehicle.

Before removing the valve cover, unbolt the cable from the negative terminal of the battery to prevent any electrical short circuiting. After that, take out the bolts that hold the Engine cover and then take out this cover from the valve cover. Purge and remove any hoses or wires connecting the throttle body, alternator or valve cover, pull the connectors off the ignition coils and neatly lay down the harness to one side. After doing this, take out the engine oil dipstick and, ensure that the valve cover is clean to avoid cases where particles get to the exposed cylinder head or camshaft/valve train assembly. After that, loosen and take out the valve cover bolts in the direction opposite to that followed while tightening them and, finally, gently raise the valve cover and the gasket off with your hands, although trying to pry with a rubber mallet gently between the cover and the cylinder head if the cover is very stuck to the head and its gasket seal is really very tight. For installation, one has to un-fasten the old gasket and than clean the surfaces to be gasketed; these are the cylinder head surface and the valve cover surface, using the breaker system cleaner and a rag. Place a new molded rubber gasket to the groove raised at the perimeter of the valve cover; use beads of RTV sealant at the joint area of the timing chain cover and the cylinder head. Fit the cover into place and install the bolts with equations to the recommended torque. Lastly, return to procedures of the removal section and connect the battery again.

To remove the components, first disconnect the cable from the negative battery terminal. For Civic models, remove the cowl cover. Next, take out the two engine cover screws and pull the cover up and off the ball stud. Remove the ignition coils, and for 2015 and later CR-V models, disconnect the wiring to the alternator, then release the harness retainers and move the harness aside. On CR-V models, remove the dipstick, disconnect the valve cover breather hose and PCV hose. For 2015 and later CR-V models, remove the high-pressure fuel pump cover. Then, remove the valve cover bolts or screws and lift the valve cover off, tapping gently with a soft-face hammer if necessary to break the gasket seal. For installation, clean the gasket surfaces on the intake manifold, cylinder head, and valve cover using a shop rag and brake system cleaner to eliminate all residue and gasket material. Insert a new valve cover gasket into the grooved recess in the valve cover, ensuring it is properly positioned. Install new seals on the spark plug tubes, apply a slight amount of RTV sealant to the timing chain cover grooves and the high-pressure fuel pump base mating areas, and tighten the valve cover nuts or bolts in the correct sequence to the specified torque. The remainder of the installation follows the reverse order of removal, and finally, reconnect the battery.

If the cover is stuck, gently bump the end with a block of wood and a hammer to loosen it, avoiding prying at the cover-to-head joint to prevent damage.

Remove the valve cover bolts or screws and lift the valve cover off, tapping gently with a soft-face hammer if necessary to break the gasket seal.

Tighten the valve cover nuts in the correct sequence to the specified torque.

Remove the valve cover bolts in the reverse order of the tightening sequence.

Remove the dipstick and the valve cover breather hose.

12310-R40-A00 is front only