Chrysler 4648828AE Piston

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The cylinder head as well as the oil pan has to come off before the piston and connecting rod assemblies are to be slid off. Feel with your fingertip for ribbing just below the top of ring travel that should be worn off with a special wire to facilitate piston breakage. After that, right side up the engine with the crankshaft facing up after having detaching the ridges. Now align the connecting rod with the crankshaft journal and measure the end play of the connecting rod end using feeler gauge, if it is beyond the limit a set of new connecting rod may be required. Place marks on the connecting rods and caps for easier identification then remove the first connecting rod cap and bearing insert by loosening the connective rod cap bolt but do not drop it. Withdraw the connecting rod/piston assembly out through the top of the engine; make sure that all the ridge material has been taken off. Do the same for the other cylinders; reassemble the connecting rod caps and the bearing inserts because when they are out, they are sensitive to being scratched. While replacing piston rings, the end gap best be checked and equalized, and the piston ring side clearance best be set. Oil separate batches for matching during assembly of the piston/connecting rod assemblies, the new ring sets. Place the top ring into the first cylinder, and then using the feeler gauges to check the end gap and if needed further regulate the value. The first step is to fit the oil control ring in the right position and the other rings are the middle and the top rings. Prior to this the cylinder walls should be cleaned, the edges chamfered and the crankshaft must already be set. Place the new upper bearing insert in the connecting rod as appropriate then tighten and again do not lubricate. Align the gaps of the piston ring at equal measures of ninety degrees and lightly oil the piston as well as the rings before use of the piston ring compressor for compressing the rings for installation. Place the piston/connecting rod assembly into the cylinder in a manner that the connecting rod should sit on the crankshaft journal. Do this on the connecting rod bearing oil clearance using limited Plastigage while making sure that the surfaces are free from oil. In the event of this clearance is not as specified, check the bearing inserts or journal diameter. Remove the Plastigage and coat the bearing faces with grease or assembly lube before replacing a connecting rod and cap and torque to the factory recommended amount. As for the other assemblies, the same procedure is followed with regard to cleanliness and correct orientation of the components. The crankshaft needs to be installed and then turned by hand in order to look for tight places and then to check the connecting-rod end play and compare it with the permissible472 tolerance.

Apply a uniform layer of assembly lube to the bearing faces, reinstall the rod cap, and repeat the process for the remaining assemblies.

Insert the top ring into the first cylinder, measure the end gap with feeler gauges, and adjust if necessary. Install the oil control ring first, followed by the middle and top rings, ensuring the correct orientation.

The cylinder head(s), oil pan, and oil pump must be taken off.

Remove the cap from the number one connecting rod, taking care to note the marks made during removal, and clean the bearing surfaces with a lint-free cloth.

The piston ring side clearance is measured by placing a new piston ring in each groove and using a feeler gauge at several points around the groove, ensuring the correct ring is used for each groove.