Question 1

How Can Rod Bearing Caps Be Marked and Installed for Accurate Assembly on Chrysler Pacifica?

Accepted Answer

Be sure to mark the bearing caps before you remove them, because they cannot be swapped with each other. When fitting the bearing shell's tangs into the rods and caps, the rods and caps should be done in such a way that the same side of each cap's tang corresponds to the rods' tangs. Fasten the entire group of rods onto the same bank and make sure that the crankshaft journal limits remain under 0.005 mm of taper or out-of-round. Bearings can be obtained in standard sizes and sizes down to 0.025 mm (0.001 inch) and 0.254 mm (0.010 inch) in undersize diameters; install them in pairs and use new halves only and don't try to alter the rods or bearing caps. When measuring main bearing clearance and connecting rod bearing clearance, use plastigage. Check the rod bearing bolts before using them; if the threads look narrowed, you will have to replace them. Test connecting rod bolts by touching a scale to the threads; if the scale does not meet all the threads, you need to replace the bolt. Inspection of the threads should be done first, after which the bolts are installed lightly and overlapped, each being torqued in turn to attach the cap. Screw the connecting rod cap bolts to the level required in the service manual. To measure connecting rod side clearance, place a dial indicator on a still point of the engine and direct the probe perpendicular to the connecting rod cap you're checking. Go to the rear position of the connecting rod, zero the dial, move the rod forwards to its farthest point and check the dial indicator. Check each connecting rod's measurement against what is written in the engine specifications and repeat the process while turning the crankshaft to see all the rods.

Question 2

What is the Role of Rod Bearing in Measuring Engine Crankshaft Bearing Clearances with Plastigage on Chrysler Pacifica?

Accepted Answer

The preferred way to measure clearance between the engine crankshaft and its bearings is with Plastigage. The check surface should be cleaned of any oil as Plastigage dissolves in oil. In the next step, position a piece of Plastigage across the whole width of the shell in the cap, placing it about 6.35 mm from the center and to the side of the oil holes; when suspecting other wear, additional Plastigage should be put there as well. Properly tighten the bed plate or retaining cap bolts to the correct specification. When you finish, remove the bearing cap, compare the Plastigage flattening with the scale on the band and find the band with the closest width to know the clearance down to thousandths of a millimeter. If the readings between the ends differ, it means there is a taper, so note it and measure all three areas. Lookup the clearance amounts in the table of engine specifications compared to how much clearance is required. In most cases, Plastigage markings are shown in both inches and the metric system. You can find it in several clearance ranges, so select the range that matches your needs. Install the right crankshaft bearings to make sure the bearing clearance matches the requirement.

OEM Chrysler Pacifica Rod Bearing

6 Rod Bearings found

Chrysler Pacifica Connecting Rod Bearing Part Number: 4893953AA

Chrysler Pacifica Connecting Rod Bearing Part Number: 4626657AD

Chrysler Pacifica Connecting Rod Bearing Part Number: 4893951AA

Chrysler Pacifica Connecting Rod Bearing Part Number: 4893952AA

Chrysler Pacifica Connecting Rod Bearing Part Number: 68002286AC

Chrysler Pacifica Bearings Part Number: 5161294AA

Chrysler Pacifica Rod Bearing

Chrysler Pacifica Rod Bearing Parts and Q&A

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