Mopar 53021557AA PUSHROD-Exhaust Valve

You can Select Your Vehicle to check if 53021557AA fits your vehicle.

To do this you will need to remove the valve covers from the cylinder heads and the bolts that hold the rocker arm shafts in place and these bolts are the center bolts followed by the bolts at the extremity of the rocker arm shafts. After the last nut is fully loosened, carefully lift the rocker shaft assembly off of the cylinder head, being sure note the position betwen the upper intake and lower exhaust rocker arms so that they can be reassembled in their original orientation. Rocker arm positions should be recorded in order to reinstall them in the correct position; each set of components should be replaced and stored as they were found; and the pushrods should be removed and stored in an order to avoid crossing them up. It is important for one to note that exhaust pushrods are a little longer than intake pushrods not interchangeable. If the cylinder heads have been machined to a standard of flatness then it is crucial to 'shorten' the appropriate length pushrods to cover the now shorter distances of the rocker arms to the camshaft dimensions, unless consulting with a machine shop. For each rocker arm, check if there is wear, cracks, and damage on the surface that comes into contact with pushrods and or valve stems, and the rocker arm shafts and the bores should also be checked to establish if they have worn out and or damaged, a worn out or damaged part must be replaced. There must be free passage into the hole at the pushrod end of each rocker arm; bears checking for crackline and abnormal wear, pushrods can be rolled across a flat surface to check for bend. Coat the lower end of each pushrod with clean engine oil or assembly lube and install these into their original position and ensure that it seals fully into the lifter socket. Coat the valve stems and the upper ends of the pushrods with assembly lube for protection of any mating surfaces during initial start up, then lubricate the rocker shafts, the rocker shaft assembly should have all components located in their original positions before being installed in to the head of the cylinder. Tighten the rocker arm shafts beginning with the centre bolt, in a preset sequence till the appropriate torque is secured so that the pushrods fit tightly in the rocker arms. If bolts when installed appear light before the shaft is seated or if pushrods bind, all the components inside should be examined. Last, put the valve covers back on, crank up the engine, scan for valve train rattles and knock and look for oil leaks at the gaskets.

In order to take off the valve covers on the cylinder heads, loosen the rocker arm shaft bolts by first unbolting the middle ones to outer ones. Fully loosen the bolts and pull up rocker shaft assembly from off of the cylinder head. Keep track of rocker arm positions and store each set of rockers so that they can be reinstalled in their original positions. Remove push rods and store them in a way that prevents mixing them up at installation time. When examining the rocker arms, search for wear, cracks, and other types of damages particularly where it comes into contact with both pushrods as well as valve stems. Similarly, look at the rocker arm bores and shafts for any signs of stress cracks, galling or wear patterns that are not usual. Any worn out or damaged parts should be replaced with new ones including installing new shafts as well. Make sure there is an opening at each end hole part of all rocker arms' pushrods. Examine push rods for end cracks excessive wear; also check them by running across a plate glass to see if they are bent or rolled. To lubricate lower ends before replacing in lifter socket put clean engine oil or engine assembly lube on lower end of each pushrod; this will ensure that they seat properly in their original places when installed again.Apply some engine assembly lube to protect valve stem ends and upper portion of stem from damage during initial start-up process. At first lubricate most components present on top sides such as upper ends for push rods together with valve stem bottoms using either pure old engine oil or brand new motor assembly greases hence avoiding knocks while starting up your vehicle for instance Rocker arm has being fully oiled using either just refined old motor oil or absolutely unused motor grease with complete assemble back onto cylinder heads through which it is expected must have gone through full application treatment.Tighten center bolt first then followed by center right bolt, center left bolt, outer right bolt, and finally the outer left bolt for rocker arm shafts. Tighten bolts, making sure that as the tightening process is proceeding push rods are properly seat in rocker arms. If such conditions develop where rocker arm bolts start becoming tight before shaft has been completely seated or else push rods are binding; all rocker arm shafts must be removed followed by totally checking all components before taking next action. Lastly install valve covers and start the engine to listen for unusual sounds from valve train and observe oil leaks at valve cover gaskets.

Inspect the pushrods for cracks and excessive wear at the ends, and check if they are bent by rolling them across a piece of plate glass.

Inspect the pushrods for cracks and excessive wear at the ends, and check if they are bent by rolling them across a piece of plate glass.