First small block Mopar build More than a little nervous
Ok here we go per the motors auto repair manual. If anyone see that i missed something or info is wrong please dont hesitate to correct or add to this.
273, & 1967-72 318,340,360
To provide correct lubrication for the rocker arms on these engines, the rocker shafts have a small notch machined at one end, Fig. 7 below, and these notches must always face inward toward the center of the engine when installed. In other words, the notched end must be toward the rear of the engine on the right bank and toward the front of the engine on the left bank.
Rocker arms must be correctly positioned on the shaft prior to installation on cylinder head. A good way to do this is to place each rocker arm on the shaft so the adjusting screw is on the same side as the notch of the shaft when rocker arm is right side up.
It is also important when installing the rocker shaft assembly on the cylinder head to position the short retainers at each end and in the center, and to place long retainers in the two remaining positions.
Valve arrangement. Front to rear
273,340,360: E-I-I-E-E-I-I-E
Locate the assembly on the cylinder head and position rocker arm adjusting screws in push rods.
Tighten bolts finger tight, bringing retainers in contact with the shaft between rocker arms.
Tighten bolts to specified torque.
1968 340.
Rocker arm shaft bracket 15 ft lbs.
Rocker arm cover 36 inch lbs.
1969-72 340.
Rocker arm shaft bracket 210 inch lbs.
Rocker arm cover 36 inch lbs.
After running the engine to normal operating temperature, adjust valve lash to specifications.
Valve lash on 340 is hydraulic and there is no adjustment.
V8's with mechanical lifters.
Engines with mechanical lifters can be identified by the rocker arm adjusting screws. These screws are self locking and when turning them during the process of adjustment they should indicate some resistance to turning
(a minimum of 3 ft lbs of tension).
If any screw turns too easily it should be replaced and if necessary the rocker arm as well.
Valve clearances should be set up after the engine is warmed up to operating temperature and to the clearances listed below.
Checking hydraulic lifter static clearance:
After performing a valve guide job or replacing a cylinder head the hydraulic lifters should be collapsed and the valve stem-to-rocker arm clearance checked. Each lifter should be checked individually to guard against differences in machining or wear variables.
Valve stem-to-rocker arm clearance should check within limits given below.
1968-72 340.
Stem clearance
Intake: .001-.003
Exhaust: .002-.004
If the actual measured clearance is less than the minimum specified, very likely the valve has been ground down too much and a new valve should be installed.
When the actual measured clearance is more than the maximum specified, the valve face should be ground down further to bring it at or below maximum static clearance specified.
To check the clearance a special spanner type tool is commercially available to apply pressure on the rocker arm to bleed down the hydraulic lifter until the plunger is completely bottomed. Of course, checking must be done with the lifter on the heel of the cam. If the special tool is not available, a stiff rod, such as a socket extension and a length of wire can be used to collapse the lifter. Wire one end of the rod to tge rocker arm as close to the valve as possible and apply presure to tge other end until lifter is collapsed.
Fig. 7
Hope this helps
Ok here we go per the motors auto repair manual. If anyone see that i missed something or info is wrong please dont hesitate to correct or add to this.
273, & 1967-72 318,340,360
To provide correct lubrication for the rocker arms on these engines, the rocker shafts have a small notch machined at one end, Fig. 7 below, and these notches must always face inward toward the center of the engine when installed. In other words, the notched end must be toward the rear of the engine on the right bank and toward the front of the engine on the left bank.
Rocker arms must be correctly positioned on the shaft prior to installation on cylinder head. A good way to do this is to place each rocker arm on the shaft so the adjusting screw is on the same side as the notch of the shaft when rocker arm is right side up.
It is also important when installing the rocker shaft assembly on the cylinder head to position the short retainers at each end and in the center, and to place long retainers in the two remaining positions.
Valve arrangement. Front to rear
273,340,360: E-I-I-E-E-I-I-E
Locate the assembly on the cylinder head and position rocker arm adjusting screws in push rods.
Tighten bolts finger tight, bringing retainers in contact with the shaft between rocker arms.
Tighten bolts to specified torque.
1968 340.
Rocker arm shaft bracket 15 ft lbs.
Rocker arm cover 36 inch lbs.
1969-72 340.
Rocker arm shaft bracket 210 inch lbs.
Rocker arm cover 36 inch lbs.
After running the engine to normal operating temperature, adjust valve lash to specifications.
Valve lash on 340 is hydraulic and there is no adjustment.
V8's with mechanical lifters.
Engines with mechanical lifters can be identified by the rocker arm adjusting screws. These screws are self locking and when turning them during the process of adjustment they should indicate some resistance to turning
(a minimum of 3 ft lbs of tension).
If any screw turns too easily it should be replaced and if necessary the rocker arm as well.
Valve clearances should be set up after the engine is warmed up to operating temperature and to the clearances listed below.
Checking hydraulic lifter static clearance:
After performing a valve guide job or replacing a cylinder head the hydraulic lifters should be collapsed and the valve stem-to-rocker arm clearance checked. Each lifter should be checked individually to guard against differences in machining or wear variables.
Valve stem-to-rocker arm clearance should check within limits given below.
1968-72 340.
Stem clearance
Intake: .001-.003
Exhaust: .002-.004
If the actual measured clearance is less than the minimum specified, very likely the valve has been ground down too much and a new valve should be installed.
When the actual measured clearance is more than the maximum specified, the valve face should be ground down further to bring it at or below maximum static clearance specified.
To check the clearance a special spanner type tool is commercially available to apply pressure on the rocker arm to bleed down the hydraulic lifter until the plunger is completely bottomed. Of course, checking must be done with the lifter on the heel of the cam. If the special tool is not available, a stiff rod, such as a socket extension and a length of wire can be used to collapse the lifter. Wire one end of the rod to tge rocker arm as close to the valve as possible and apply presure to tge other end until lifter is collapsed.
Fig. 7
Hope this helps